Re: How can I do this? toggling between two APRS messages.
I believe that's right Bob.? On a couple of balloons I launched with Byon some years ago I made a little programmable gizmo to toggle the bank pins on two different transmitters, and it was predicated on the new tx beginning just after pin state change.? This was on some older products, but I suspect the TTx products work the same way.
?
I wanted the APRS transmitters to be slightly different timings from each other? (they will be asynchronous, and transmissions will collide relatively infrequently with differing rates), and none of them a multiple of 60 seconds (so no possible synchronous collisions with other folk's transmitters, who will maybe/probably use multiples of 60 seconds).? We used slower primary transmissions on national APRS channel 144.390, and faster secondary tx on 144.920 (quiet channel for chase cars).? But could also use the national channel on both, and define different symbols to go with the different ssids.
So control line would change to primary, tx-pri would be sent, then would transition to secondary, tx-sec would be sent...
By setting?primary tx rate much longer that this period, the tx-pri is only controlled by the control line transitions.? However, then set the?secondary page tx rate to a low enough number such that we get multiple tx-sec transmissions (for the quiet channel) during the sec time.? FWIW -- something like this, from my old notes:
ssid-11:? main APRS transmitter (MT-1000):
? - set SEC_MODE control line to 10 seconds primary and 70 seconds secondary.
? - In MT-1000, config primary tx rate to 300* seconds (needs to be >80 secs),
????? and sec page tx rate to 20 seconds.
? - This will result in primary transmissions every 80 seconds, and secondary
????? every 20 seconds, on average.
? - For power calculations, the total transmissions will average once every 16 seconds.
ssid-12:? backup APRS transmitter (MT-400):
? - set SEC_MODE control line to 15 seconds primary and 55 seconds secondary.
? - In MF-15, config primary tx rate to 150** seconds (needs to be >70 secs),
????? and sec page tx rate to 22 seconds.
? - This will result in primary transmissions every 70 seconds, and secondary
????? every 23 seconds, on average.
? - For power calculations, the total transmissions will average once every 18 seconds.
* ssid-11:? by setting primary rate to 300 seconds (5 minutes), we can, after say five or six hours,
? hold the control line in primary mode, and let the transmissions occur every 5 minutes?(to save some power).
?
** ssid-12:? by setting primary rate to 150 seconds (2.5 minutes), we can, after say five or six hours,
? hold the control line in primary mode, and let the transmissions occur every 2.5 minutes?(to save some power).
?
----- Original message -----
Subject: Re: [TinyTrak] How can I do this? toggling between two APRS messages.
Date: Wednesday, June 23, 2021 1:18 PM
I think the TT4 will send out the BEACON each time it "starts".? And if
it "starts" because of the toggling of the BANK pin, then you will automatically
get a beacon based on the toggling of the BANK pin and independent of the
BEACON timing.? Though the BEvery setting will take over once it
has run long enough.... I think.....? Bob
On Wed, Jun 23, 2021 at 2:15 PM Rob Giuliano via groups.io
>
> What do you mean by 2 flavors of APRS messages?
> Do you mean 2 different callsign-ssid settings?
>?? Or message types like MICe, text, or compressed?
>?? Or message types such as position, status, telemetry, ... ?
>
> Within the TT# family, each has an input which can be used to switch between Primary (Bank0) and Secondary (Bank1) settings.? By having the desired different settings in each bank, you can switch between them using a pin on the Radio connector.? Connect a switch from that input to ground:
>?? Switch Open??? => Bank0 main settings
>?? Switch Gnd????? => Bank1 second set of settings
>
> If your desire is to swap back and forth at automatically, regular intervals, that would require a little thought.
>
> A 555 type timer circuit could be used to change the state of SW1 at regular intervals, but how would you ensure the TT# sends and switches between TX intervals.? Well, the pulse interval would have to be the same as the TX and synchronized to ensure you catch it.
>
> Or possibly a flip-flop circuit (input PTT out, output SW1), so with each "send", the circuit flips (or flops) to the other bank
>
> Another option is a second TT# unit.? I've never tried, you could possibly tee 2 units to share the same PTT (don't connect PTT IN), audio out, and ground.? The CD line might be tricky, but should also be doable.? The GPS could be shared as well.
>
> Robert Giuliano
> KB8RCO
>
>
>
> On Wednesday, June 23, 2021, 12:43:00 PM EDT, Bear Albrecht < w5vzb.nm@...> wrote: >
>
> I want to generate two flavors of APRS messages, switching on the fly back and forth.? This is for a coverage study and it would be great if I can do it for two repeaters more-or-less simultaneously, while I drive around and switch the radio between transmitting two different PL tones.? If I can do this I can have my path come out on a map in two different colors.
>
> Thanks
>
> Bear Albrecht W5VZB OOOTC
>
>?
|
Re: How can I do this? toggling between two APRS messages.
That'll do it!? (the two bank thing)? Which pin on the radio connector?? 2, 4, 8, or 9 I suppose.
How do I get into the molded connector?? Not.? I could make an "interconnector" 9-pin male to female with a switch on it.
OR put a little switch right on the TT4 box.? Aha!? Sounds better.??
(Sounds like I will need to remember to switch the PL on the transmitter before I flip the switch.)
Thanks much
;B
|
Re: How can I do this? toggling between two APRS messages.
I think the TT4 will send out the BEACON each time it "starts". And if it "starts" because of the toggling of the BANK pin, then you will automatically get a beacon based on the toggling of the BANK pin and independent of the BEACON timing. Though the BEvery setting will take over once it has run long enough.... I think..... Bob On Wed, Jun 23, 2021 at 2:15 PM Rob Giuliano via groups.io <kb8rco@...> wrote:
What do you mean by 2 flavors of APRS messages?
Do you mean 2 different callsign-ssid settings?
Or message types like MICe, text, or compressed?
Or message types such as position, status, telemetry, ... ?
Within the TT# family, each has an input which can be used to switch between Primary (Bank0) and Secondary (Bank1) settings. By having the desired different settings in each bank, you can switch between them using a pin on the Radio connector. Connect a switch from that input to ground:
Switch Open => Bank0 main settings
Switch Gnd => Bank1 second set of settings
If your desire is to swap back and forth at automatically, regular intervals, that would require a little thought.
A 555 type timer circuit could be used to change the state of SW1 at regular intervals, but how would you ensure the TT# sends and switches between TX intervals. Well, the pulse interval would have to be the same as the TX and synchronized to ensure you catch it.
Or possibly a flip-flop circuit (input PTT out, output SW1), so with each "send", the circuit flips (or flops) to the other bank
Another option is a second TT# unit. I've never tried, you could possibly tee 2 units to share the same PTT (don't connect PTT IN), audio out, and ground. The CD line might be tricky, but should also be doable. The GPS could be shared as well.
Robert Giuliano
KB8RCO
On Wednesday, June 23, 2021, 12:43:00 PM EDT, Bear Albrecht <w5vzb.nm@...> wrote:
I want to generate two flavors of APRS messages, switching on the fly back and forth. This is for a coverage study and it would be great if I can do it for two repeaters more-or-less simultaneously, while I drive around and switch the radio between transmitting two different PL tones. If I can do this I can have my path come out on a map in two different colors.
Thanks
Bear Albrecht W5VZB OOOTC
|
Re: How can I do this? toggling between two APRS messages.
What do you mean by 2 flavors of APRS messages?
Do you mean 2 different callsign-ssid settings? ? Or message types like MICe, text, or compressed? ? Or message types such as position, status, telemetry, ... ?
Within the TT# family, each has an input which can be used to switch between Primary (Bank0) and Secondary (Bank1) settings.? By having the desired different settings in each bank, you can switch between them using a pin on the Radio connector.? Connect a switch from that input to ground: ? Switch Open??? => Bank0 main settings
? Switch Gnd??? ? => Bank1 second set of settings
If your desire is to swap back and forth at automatically, regular intervals, that would require a little thought.
A 555 type timer circuit could be used to change the state of SW1 at regular intervals, but how would you ensure the TT# sends and switches between TX intervals.? Well, the pulse interval would have to be the same as the TX and synchronized to ensure you catch it.
Or possibly a flip-flop circuit (input PTT out, output SW1), so with each "send", the circuit flips (or flops) to the other bank
Another option is a second TT# unit.? I've never tried, you could possibly tee 2 units to share the same PTT (don't connect PTT IN), audio out, and ground.? The CD line might be tricky, but should also be doable.? The GPS could be shared as well.
On Wednesday, June 23, 2021, 12:43:00 PM EDT, Bear Albrecht <w5vzb.nm@...> wrote:
I want to?generate two flavors of APRS messages, switching on the fly back and forth.? This is for a coverage study and it would be great if I can do it for two repeaters more-or-less simultaneously, while I drive around and switch the radio between transmitting two different PL tones.? If I can do this I can have my path come out on a map in two different colors.
Thanks?
Bear Albrecht W5VZB OOOTC
|
How can I do this? toggling between two APRS messages.
I want to?generate two flavors of APRS messages, switching on the fly back and forth.? This is for a coverage study and it would be great if I can do it for two repeaters more-or-less simultaneously, while I drive around and switch the radio between transmitting two different PL tones.? If I can do this I can have my path come out on a map in two different colors.
Thanks?
Bear Albrecht W5VZB OOOTC
|
Re: Tiny Trak 3+ questions
Rob,?
Thank you for your well thought out tips.??
I believe 1) Callsign, etc. and 2) digipath are good.?
Will start testing the rest of these troubleshooting ideas next.?
Thank you,
Joel?
On June 7, 2021 10:44:38 AM "Rob Giuliano via groups.io" <kb8rco@...> wrote:
If the power up sequence is continually repeating, there is something with Vin (low battery?).
The TT3+ tracker only has a few settings and of course all are for TX.
Key Settings are: 1.? Callsign SSID, Symbol, etc. (of course)
2.? DIGI path: with an HT, suggest WIDE1-1,WIDE2-1 (or maybe WIDE1-1,WIDE2-2) 3.? Audio level (R6) adjustment => best to have another radio to listen to the TX on. 4.? CD setting(R9) to tell the TT3+ when the RF is clear and it can TX.
Other troubleshooting ideas: 1. For testing, it is best to use the longer packets (MIC-E OFF) ??? If possible, another receiver (RTL dongles work well) and soundcard TNC (like Direwolf)
?????? to decode your packets and display on screen.? If not, just the audio on another receiver
?????? will help. 2. Does the TT3+ transmit TX LED come ON at the correct interval? ??? You can disable SmartBeaconing and use Auto Transmit Rate, set? to a short time for testing.
? ? ?? Don't forget to turn back on if you intend to use it!
??? If no TX LED, most common issue is the CD LED is constantly ON or ON most of the time.? ?????? This prevents TX.?
?????? Adjust R9 or use the radio's SQL control (works okay for TX only)
3. When TXing, can you hear it with another radio??
???? Does it sound like other packets you can hear? ???? Adjust R6 to get it sounding properly.? HTs tend to be very sensitive to audio levels.
4. Does the GPS get a lock?? For testing, you can uncheck "Only Send Valid". ??? Don't forget to turn back on if you intend to use it!
??? ???
On Monday, June 7, 2021, 9:55:15 AM EDT, Joel <joelgroup@...> wrote:
Hi,
I am new to both the Tiny Trak 3+ and using APRS.
Setup is pre-built TT3, Beofeng UV-82, and radio cable made by Bionics.? Both VFO set to 144.390 (MA in USA) high power of about 5W into quarter wave mag mount.? Battery for a charged 12V and 12 AH gel battery.?
Goal of the setup is a tracker used for my hiking / bicycling / motorcycling.?
My setup currently does not make it into the APRS network and show up in sites like aprs.fi.
In to configuration of TT3 via the web page app and unsure where I should be improving / modifying.??
Is it trial and error, or is there a troubleshooting diagram to document on how to get it to work when near my local node or digipeater??
Currently testing the TT3+ will power up and within a few minutes flash 1 red, then three flashes of orange and green together, then repeat.??
Is there a way to understand the flashing LED pattern??
Any thoughts on where to look next to be successful??
Thank you,
Joel Desrochers N1KRL?
|
Re: Tiny Trak 3+ questions
If the power up sequence is continually repeating, there is something with Vin (low battery?).
The TT3+ tracker only has a few settings and of course all are for TX.
Key Settings are: 1.? Callsign SSID, Symbol, etc. (of course)
2.? DIGI path: with an HT, suggest WIDE1-1,WIDE2-1 (or maybe WIDE1-1,WIDE2-2) 3.? Audio level (R6) adjustment => best to have another radio to listen to the TX on. 4.? CD setting(R9) to tell the TT3+ when the RF is clear and it can TX.
Other troubleshooting ideas: 1. For testing, it is best to use the longer packets (MIC-E OFF) ??? If possible, another receiver (RTL dongles work well) and soundcard TNC (like Direwolf)
?????? to decode your packets and display on screen.? If not, just the audio on another receiver
?????? will help. 2. Does the TT3+ transmit TX LED come ON at the correct interval? ??? You can disable SmartBeaconing and use Auto Transmit Rate, set? to a short time for testing.
? ? ?? Don't forget to turn back on if you intend to use it!
??? If no TX LED, most common issue is the CD LED is constantly ON or ON most of the time.? ?????? This prevents TX.?
?????? Adjust R9 or use the radio's SQL control (works okay for TX only)
3. When TXing, can you hear it with another radio??
???? Does it sound like other packets you can hear? ???? Adjust R6 to get it sounding properly.? HTs tend to be very sensitive to audio levels.
4. Does the GPS get a lock?? For testing, you can uncheck "Only Send Valid". ??? Don't forget to turn back on if you intend to use it!
??? ???
On Monday, June 7, 2021, 9:55:15 AM EDT, Joel <joelgroup@...> wrote:
Hi,
I am new to both the Tiny Trak 3+ and using APRS.
Setup is pre-built TT3, Beofeng UV-82, and radio cable made by Bionics.? Both VFO set to 144.390 (MA in USA) high power of about 5W into quarter wave mag mount.? Battery for a charged 12V and 12 AH gel battery.?
Goal of the setup is a tracker used for my hiking / bicycling / motorcycling.?
My setup currently does not make it into the APRS network and show up in sites like aprs.fi.
In to configuration of TT3 via the web page app and unsure where I should be improving / modifying.??
Is it trial and error, or is there a troubleshooting diagram to document on how to get it to work when near my local node or digipeater??
Currently testing the TT3+ will power up and within a few minutes flash 1 red, then three flashes of orange and green together, then repeat.??
Is there a way to understand the flashing LED pattern??
Any thoughts on where to look next to be successful??
Thank you,
Joel Desrochers N1KRL?
|
Hi,
I am new to both the Tiny Trak 3+ and using APRS.
Setup is pre-built TT3, Beofeng UV-82, and radio cable made by Bionics.? Both VFO set to 144.390 (MA in USA) high power of about 5W into quarter wave mag mount.? Battery for a charged 12V and 12 AH gel battery.?
Goal of the setup is a tracker used for my hiking / bicycling / motorcycling.?
My setup currently does not make it into the APRS network and show up in sites like aprs.fi.
In to configuration of TT3 via the web page app and unsure where I should be improving / modifying.??
Is it trial and error, or is there a troubleshooting diagram to document on how to get it to work when near my local node or digipeater??
Currently testing the TT3+ will power up and within a few minutes flash 1 red, then three flashes of orange and green together, then repeat.??
Is there a way to understand the flashing LED pattern??
Any thoughts on where to look next to be successful??
Thank you,
Joel Desrochers N1KRL?
|
Re: new here - MTT4BT on a bicycle
I meant to say seven months of the year when the weather is NOT suitable for bicycling :-( The order for the MTT4BT went in this morning. Could we ever use some APRS coverage here, if not for our own use then for visitors once the COVID restrictions are lifted. Hundreds of miles of highway with no cell coverage, at least amateur radio oeprators on the highway should be able to contact someone before they arrive at Yellowknife. Ron VE8RT On Tue, 1 Jun 2021 17:59:21 -0600 "Ron VE8RT" <ve8rt@...> wrote: Very good question as its hard to think of a reason to operate a digi
on a bicycle, apart from using the bicycle as an antenna support at a
temporary location. The digi is a desired option for the seven months
of the year when the weather is suitable for bicycling.
I have the battery power (Lithium battery pack for larger RC vehicle)
to operate the 10W MTT4BT, rather than buying a TX only tracker for the
bike and then and a Digipeater for other uses I'll start with the more
versatile MTT4BT. APRS here in VE8 is under utilized, so many
potential applications but only one gateway and one digipeater, unless
our friends in Inuvik have one its the only access in the call area.
The digipeater (on its own) would come in very handy for some of our
events support work.
Maybe at some future point we'll have some solar/wind (solar doesn't
work well in our winter :-) powered digipeaters along the highway
(about 300 miles) to provide coverage to the Alberta border.
Hope you're doing well, I've been regretting not picking up an APRS
capable handheld as you suggested a couple of years ago, I haven't been
able to find one in recent months.
Nice to hear from you, thanks!
Ron
On Tue, 1 Jun 2021 16:11:31 -0400
"Robert Bruninga" <bruninga@...> wrote:
why a digi on a bike?
Bob
On Tue, Jun 1, 2021 at 12:52 AM Ron VE8RT <ve8rt@...> wrote:
I have installed APRSDroid on a smart Phone (its a spare without a
SIM card), I need to read up on it's features, whether it will do
digipeating. For use on the bike I would do without the GPS receiver
if I could, otherwise where space and wiring is less of a concern I'm
OK with a GPS receiver.
Now that your long weekend is about over I should get my order in
for the MTT4BT.
Ron
On Tue, 1 Jun 2021 01:23:27 +0000 (UTC)
"Rob Giuliano via groups.io" <kb8rco@...> wrote:
I believe you can send GPS datz from an A droid device to the MTT4BT with an Android app like "Share GPS" (there probably are better ones) which will send the GPS data over BT. You just have to configure the port properly.
Note: Although you can get GPS data over a Text or KISS port, I think using the BT for GPS will prevent the MTT4BT from connecting to an APRS client over that connection. Byon would have to confirm.
On Mon, May 31, 2021 at 20:47, Ron VE8RT<ve8rt@...> wrote: Hi Robert,
during the summer it would reside most of the time on the bike.
Summers here are short, so it would be multi-purposed at other times.
The digipeating feature would likely be used, there is a single I-Node
in town, likely its the only one in the VE8 call area, and one
digipeater at the local high school. There is little coverage, but it
handles a weather station or two, and local APRS traffic.
I was wondering if the BT would carry GPS data from the phone to the
MTT4BT.
Ron VE8RT
On Mon, 31 May 2021 19:02:13 +0000 (UTC)
"Rob Giuliano via groups.io" <kb8rco@...> wrote:
I would ask that you start with the features you want while cycling, rather than a broad question of what is the best installation. The best installation is one that servers your wants at your station - in this case on a bicycle.
For instance:a) If you only want to send postion reports while cycling, then a simple tracker like the MT-AIO would work just fine.
Built in GPS and RF transmitter with a TT3 based tracker.
No interface with a Android phone, EXCEPT where the phone is attached to APRS-IS
and the phone's APRS client receives from the APRS-IS system.
b) MTT4BT adds many features (RX, DIGI, BT to phone), but requires an external GPS. You can add a display and keyboard (probably little value on a bicycle).
With the BT interafce to the Android phone, you add all the capability of the APRS client of the phone. Most APRS clients prefer KISS interface and add a lot of features, but again difficult while bicycle mobile. There are terminal programs available that 'should allow' you to configure the MTT4BT through BT. They are typically less convenient than a computer - but mostly usable.
When I've used my MTT4 while riding, I just stick it in a fender bag with a 1/4 wave mag mount. Sometimes inside the same bag - at the far end, but usually the mag mount is on its own bracket. A small (1.4Ah Power Sonic) gell battery for power. I typically run it at 1 to 2 watts out, and turn off DIGI functions.
Robert Giuliano
KB8RCO
On Sunday, May 30, 2021, 9:47:23 AM EDT, Ron VE8RT <ve8rt@...> wrote:
Hi from Yellowknife, NT,
I'm about to purchase a MTT4BT for portable use (powered by a lithium
battery). Initally I plan to install it on my (recumbent) bicycle. For
the bike minimal hardware (less space and weight) is the goal. If a
surplus Android phone is connected by bluetooth what I can I do through
it, configuration? APRS texts? In short, what is the most practical
hardware setup for a bicycle installation?
Thanks, Ron
--
Ron VE8RT <ve8rt@...>
--
Ron VE8RT <ve8rt@...>
--
Ron VE8RT <ve8rt@...>
--
Ron VE8RT <ve8rt@...>
-- Ron VE8RT <ve8rt@...>
|
Re: new here - MTT4BT on a bicycle
Very good question as its hard to think of a reason to operate a digi on a bicycle, apart from using the bicycle as an antenna support at a temporary location. The digi is a desired option for the seven months of the year when the weather is suitable for bicycling. I have the battery power (Lithium battery pack for larger RC vehicle) to operate the 10W MTT4BT, rather than buying a TX only tracker for the bike and then and a Digipeater for other uses I'll start with the more versatile MTT4BT. APRS here in VE8 is under utilized, so many potential applications but only one gateway and one digipeater, unless our friends in Inuvik have one its the only access in the call area. The digipeater (on its own) would come in very handy for some of our events support work. Maybe at some future point we'll have some solar/wind (solar doesn't work well in our winter :-) powered digipeaters along the highway (about 300 miles) to provide coverage to the Alberta border. Hope you're doing well, I've been regretting not picking up an APRS capable handheld as you suggested a couple of years ago, I haven't been able to find one in recent months. Nice to hear from you, thanks! Ron On Tue, 1 Jun 2021 16:11:31 -0400 "Robert Bruninga" <bruninga@...> wrote: why a digi on a bike?
Bob
On Tue, Jun 1, 2021 at 12:52 AM Ron VE8RT <ve8rt@...> wrote:
I have installed APRSDroid on a smart Phone (its a spare without a
SIM card), I need to read up on it's features, whether it will do
digipeating. For use on the bike I would do without the GPS receiver
if I could, otherwise where space and wiring is less of a concern I'm
OK with a GPS receiver.
Now that your long weekend is about over I should get my order in
for the MTT4BT.
Ron
On Tue, 1 Jun 2021 01:23:27 +0000 (UTC)
"Rob Giuliano via groups.io" <kb8rco@...> wrote:
I believe you can send GPS datz from an A droid device to the MTT4BT with an Android app like "Share GPS" (there probably are better ones) which will send the GPS data over BT. You just have to configure the port properly.
Note: Although you can get GPS data over a Text or KISS port, I think using the BT for GPS will prevent the MTT4BT from connecting to an APRS client over that connection. Byon would have to confirm.
On Mon, May 31, 2021 at 20:47, Ron VE8RT<ve8rt@...> wrote: Hi Robert,
during the summer it would reside most of the time on the bike.
Summers here are short, so it would be multi-purposed at other times.
The digipeating feature would likely be used, there is a single I-Node
in town, likely its the only one in the VE8 call area, and one
digipeater at the local high school. There is little coverage, but it
handles a weather station or two, and local APRS traffic.
I was wondering if the BT would carry GPS data from the phone to the
MTT4BT.
Ron VE8RT
On Mon, 31 May 2021 19:02:13 +0000 (UTC)
"Rob Giuliano via groups.io" <kb8rco@...> wrote:
I would ask that you start with the features you want while cycling, rather than a broad question of what is the best installation. The best installation is one that servers your wants at your station - in this case on a bicycle.
For instance:a) If you only want to send postion reports while cycling, then a simple tracker like the MT-AIO would work just fine.
Built in GPS and RF transmitter with a TT3 based tracker.
No interface with a Android phone, EXCEPT where the phone is attached to APRS-IS
and the phone's APRS client receives from the APRS-IS system.
b) MTT4BT adds many features (RX, DIGI, BT to phone), but requires an external GPS. You can add a display and keyboard (probably little value on a bicycle).
With the BT interafce to the Android phone, you add all the capability of the APRS client of the phone. Most APRS clients prefer KISS interface and add a lot of features, but again difficult while bicycle mobile. There are terminal programs available that 'should allow' you to configure the MTT4BT through BT. They are typically less convenient than a computer - but mostly usable.
When I've used my MTT4 while riding, I just stick it in a fender bag with a 1/4 wave mag mount. Sometimes inside the same bag - at the far end, but usually the mag mount is on its own bracket. A small (1.4Ah Power Sonic) gell battery for power. I typically run it at 1 to 2 watts out, and turn off DIGI functions.
Robert Giuliano
KB8RCO
On Sunday, May 30, 2021, 9:47:23 AM EDT, Ron VE8RT <ve8rt@...> wrote:
Hi from Yellowknife, NT,
I'm about to purchase a MTT4BT for portable use (powered by a lithium
battery). Initally I plan to install it on my (recumbent) bicycle. For
the bike minimal hardware (less space and weight) is the goal. If a
surplus Android phone is connected by bluetooth what I can I do through
it, configuration? APRS texts? In short, what is the most practical
hardware setup for a bicycle installation?
Thanks, Ron
--
Ron VE8RT <ve8rt@...>
--
Ron VE8RT <ve8rt@...>
--
Ron VE8RT <ve8rt@...>
-- Ron VE8RT <ve8rt@...>
|
Re: new here - MTT4BT on a bicycle
why a digi on a bike?
Bob
toggle quoted message
Show quoted text
On Tue, Jun 1, 2021 at 12:52 AM Ron VE8RT <ve8rt@...> wrote:
I have installed APRSDroid on a smart Phone (its a spare without a
SIM card), I need to read up on it's features, whether it will do
digipeating. For use on the bike I would do without the GPS receiver
if I could, otherwise where space and wiring is less of a concern I'm
OK with a GPS receiver.
Now that your long weekend is about over I should get my order in
for the MTT4BT.
Ron
On Tue, 1 Jun 2021 01:23:27 +0000 (UTC)
"Rob Giuliano via groups.io" <kb8rco@...> wrote:
I believe you can send GPS datz from an A droid device to the MTT4BT with an Android app like "Share GPS" (there probably are better ones) which will send the GPS data over BT. You just have to configure the port properly.
Note: Although you can get GPS data over a Text or KISS port, I think using the BT for GPS will prevent the MTT4BT from connecting to an APRS client over that connection. Byon would have to confirm.
On Mon, May 31, 2021 at 20:47, Ron VE8RT<ve8rt@...> wrote: Hi Robert,
during the summer it would reside most of the time on the bike.
Summers here are short, so it would be multi-purposed at other times.
The digipeating feature would likely be used, there is a single I-Node
in town, likely its the only one in the VE8 call area, and one
digipeater at the local high school. There is little coverage, but it
handles a weather station or two, and local APRS traffic.
I was wondering if the BT would carry GPS data from the phone to the
MTT4BT.
Ron VE8RT
On Mon, 31 May 2021 19:02:13 +0000 (UTC)
"Rob Giuliano via groups.io" <kb8rco@...> wrote:
I would ask that you start with the features you want while cycling, rather than a broad question of what is the best installation. The best installation is one that servers your wants at your station - in this case on a bicycle.
For instance:a) If you only want to send postion reports while cycling, then a simple tracker like the MT-AIO would work just fine.
Built in GPS and RF transmitter with a TT3 based tracker.
No interface with a Android phone, EXCEPT where the phone is attached to APRS-IS
and the phone's APRS client receives from the APRS-IS system.
b) MTT4BT adds many features (RX, DIGI, BT to phone), but requires an external GPS. You can add a display and keyboard (probably little value on a bicycle).
With the BT interafce to the Android phone, you add all the capability of the APRS client of the phone. Most APRS clients prefer KISS interface and add a lot of features, but again difficult while bicycle mobile. There are terminal programs available that 'should allow' you to configure the MTT4BT through BT. They are typically less convenient than a computer - but mostly usable.
When I've used my MTT4 while riding, I just stick it in a fender bag with a 1/4 wave mag mount. Sometimes inside the same bag - at the far end, but usually the mag mount is on its own bracket. A small (1.4Ah Power Sonic) gell battery for power. I typically run it at 1 to 2 watts out, and turn off DIGI functions.
Robert Giuliano
KB8RCO
On Sunday, May 30, 2021, 9:47:23 AM EDT, Ron VE8RT <ve8rt@...> wrote:
Hi from Yellowknife, NT,
I'm about to purchase a MTT4BT for portable use (powered by a lithium
battery). Initally I plan to install it on my (recumbent) bicycle. For
the bike minimal hardware (less space and weight) is the goal. If a
surplus Android phone is connected by bluetooth what I can I do through
it, configuration? APRS texts? In short, what is the most practical
hardware setup for a bicycle installation?
Thanks, Ron
--
Ron VE8RT <ve8rt@...>
--
Ron VE8RT <ve8rt@...>
--
Ron VE8RT <ve8rt@...>
|
Re: new here - MTT4BT on a bicycle
Thanks Robert, got it :-) While on the bike the only function would be position reporting and when parked maybe text through APRSDroid, the MTT4BT would be used as a KISS TNC. At other times, I should have the external antenna for vehicle or fixed location use, and sort out a (wired?) terminal. APRSdroid has appended my call sign VE8TEA-5 for me, VE8TEA is an additional call I use for experimenting. I as hoping to get the MTT4BT ordered this morning, but I'm on my way to work and will try tonight. Really appreciate the help ! Ron VE8RT VE8TEA FP5EK On Tue, 1 Jun 2021 12:28:13 +0000 (UTC) "Rob Giuliano via groups.io" <kb8rco@...> wrote: I don't think I explained this as well as I should before:
To use the APRS client (like APRSDroid) on your phone with the MTT4BT, you will need a separate GPS, or use the MTT4BT as just a simple KISS TNC (disable all position reports as there will be no position data coming in).? You could leave any MTT4BT function that does not require a GPS enabled, but only have one active.? The APRS client on the phone will then do all the APRS functions: beacon, status, DIGI etc.
If you are receiving GPS data over the BT on PORT-A and want to use the MTT4BT for position reporting, you will need to configure PORT-B for GPS and attach a GPS to PORT-B.? It will not be able to communicate with APRSDroid as a APRS client over BT.? I am quite confident that the MTT4BT will not decode RF packets to a port configured as GPS.
Three more key points:1. Each device that is capable of generating APRS packets should have a unique CALL-SSID combination.??? Please do not use the same SSID on the phone and MTT4BT.2. It is 'not good practice' (and will likely cause problems) to enable the DIGI on 2 connected devices.??? If you are connected to APRSDroid and use its DIGI function, disable DIGI on the MTT4BT.? Other way as well.
3. APRSDroid (like most clients) will want to send info to APRS-IS??? This means using you phone's data plan
Most of the features you would be using are in the MTT4BT itself - including the DIGI function.If you are not using advanced features - like things that need a screen (maps, etc.) or keyboard (messaging) then the phone could easily be the GPS source only (with a GPS sharing app).
Simplest configuration (IMHO):
* Install and configure a GPS BT sharing app on the Android.
* Configure the BT for PORT-A of the MTT4BT as GPS.? I suggest leaving it at 19200 baud and configuring the BT of the Android APP that will send the GPS data to the MTT4BT to match that speed.? Then you can leave PORT-A of the MTT4BT settings the same for when you configure anything there.
Robert Giuliano
KB8RCO
On Tuesday, June 1, 2021, 12:52:14 AM EDT, Ron VE8RT <ve8rt@...> wrote:
? I have installed APRSDroid on a smart Phone (its a spare without a
SIM card), I need to read up on it's features, whether it will do
digipeating.? For use on the bike I would do without the GPS receiver
if I could, otherwise where space and wiring is less of a concern I'm
OK with a GPS receiver.
? Now that your long weekend is about over I should get my order in
for the MTT4BT.
? ? Ron
On Tue, 1 Jun 2021 01:23:27 +0000 (UTC)
"Rob Giuliano via groups.io" <kb8rco@...> wrote:
I believe you can send GPS datz from an A droid device to the MTT4BT with an Android app like "Share GPS" (there probably are better ones) which will send the GPS data over BT.? You just have to configure the port properly.??
Note: Although you can get GPS data over a Text or KISS port, I think using the BT for GPS will prevent the MTT4BT from connecting to an APRS client over that connection.? Byon would have to confirm.
? On Mon, May 31, 2021 at 20:47, Ron VE8RT<ve8rt@...> wrote:? Hi Robert,
? during the summer it would reside most of the time on the bike.
Summers here are short, so it would be multi-purposed at other times.
The digipeating feature would likely be used, there is a single I-Node
in town, likely its the only one in the VE8 call area, and one
digipeater at the local high school.? There is little coverage, but it
handles a weather station or two, and local APRS traffic.
? I was wondering if the BT would carry GPS data from the phone to the
MTT4BT.
? ? Ron VE8RT
On Mon, 31 May 2021 19:02:13 +0000 (UTC)
"Rob Giuliano via groups.io" <kb8rco@...> wrote:
I would ask that you start with the features you want while cycling, rather than a broad question of what is the best installation.? The best installation is one that servers your wants at your station - in this case on a bicycle.
For instance:a) If you only want to send postion reports while cycling, then a simple tracker like the MT-AIO would work??? just fine.????
??? Built in GPS and RF transmitter with a TT3 based tracker.
??? No interface with a Android phone, EXCEPT where the phone is attached to APRS-IS
??? and the phone's APRS client receives from the APRS-IS system.
b) MTT4BT adds many features (RX, DIGI,? BT to phone), but requires an external GPS.??? You can add a display and keyboard (probably little value on a bicycle).
??? With the BT interafce to the Android phone, you add all the capability of the APRS client of the phone.??? Most APRS clients prefer KISS interface and add a lot of features, but again difficult while bicycle mobile.??? There are terminal programs available that 'should allow' you to configure the MTT4BT through BT.??? They are typically less convenient than a computer - but mostly usable.
When I've used my MTT4 while riding, I just stick it in a fender bag with a 1/4 wave mag mount.? Sometimes inside the same bag - at the far end, but usually the mag mount is on its own bracket.? A small (1.4Ah Power Sonic) gell battery for power.? I typically run? it at 1 to 2 watts out, and turn off DIGI functions.
Robert Giuliano
KB8RCO
? ? On Sunday, May 30, 2021, 9:47:23 AM EDT, Ron VE8RT <ve8rt@...> wrote:
? Hi from Yellowknife, NT,
? I'm about to purchase a MTT4BT for portable use (powered by a lithium
battery).? Initally I plan to install it on my (recumbent) bicycle.? For
the bike minimal hardware (less space and weight) is the goal.? If a
surplus Android phone is connected by bluetooth what I can I do through
it, configuration? APRS texts?? In short, what is the most practical
hardware setup for a bicycle installation?
? ? Thanks,? Ron
--
Ron VE8RT <ve8rt@...>
--
Ron VE8RT <ve8rt@...>
--
Ron VE8RT <ve8rt@...>
-- Ron VE8RT <ve8rt@...>
|
Re: new here - MTT4BT on a bicycle
I don't think I explained this as well as I should before:
To
use the APRS client (like APRSDroid) on your phone with the MTT4BT, you
will need a separate GPS, or use the MTT4BT as just a simple KISS TNC
(disable all position reports as there will be no position data coming
in).? You could leave any MTT4BT function that does not require a GPS enabled, but only have one active.? The APRS client on the phone will then do all the APRS functions: beacon, status, DIGI etc.
If you are receiving GPS data over the BT on PORT-A and want to use the
MTT4BT for position reporting, you will need to configure PORT-B for GPS and attach a GPS to PORT-B.? It will not be able to communicate with APRSDroid as a
APRS client over BT.? I am quite confident that the MTT4BT will not decode RF
packets to a port configured as GPS.
Three more key points: 1. Each device that is capable of generating APRS packets should have a unique CALL-SSID combination. ??? Please do not use the same SSID on the phone and MTT4BT. 2. It is 'not good practice' (and will likely cause problems) to enable the DIGI on 2 connected devices. ??? If you are connected to APRSDroid and use its DIGI function, disable DIGI on the MTT4BT.? Other way as well.
3. APRSDroid (like most clients) will want to send info to APRS-IS ??? This means using you phone's data plan
Most of the features you would be using are in the MTT4BT itself - including the DIGI function. If you are not using advanced features - like things that need a screen (maps, etc.) or keyboard (messaging) then the phone could easily be the GPS source only (with a GPS sharing app).
Simplest configuration (IMHO):
* Install and configure a GPS BT sharing app on the Android.
* Configure the BT for PORT-A of the MTT4BT as GPS.? I suggest leaving it at 19200 baud and configuring the BT of the Android APP that will send the GPS data to the MTT4BT to match that speed.? Then you can leave PORT-A of the MTT4BT settings the same for when you configure anything there.
On Tuesday, June 1, 2021, 12:52:14 AM EDT, Ron VE8RT <ve8rt@...> wrote:
? I have installed APRSDroid on a smart Phone (its a spare without a
SIM card), I need to read up on it's features, whether it will do
digipeating.? For use on the bike I would do without the GPS receiver
if I could, otherwise where space and wiring is less of a concern I'm
OK with a GPS receiver.
? Now that your long weekend is about over I should get my order in
for the MTT4BT.
? ? Ron
On Tue, 1 Jun 2021 01:23:27 +0000 (UTC)
> I believe you can send GPS datz from an A droid device to the MTT4BT with an Android app like "Share GPS" (there probably are better ones) which will send the GPS data over BT.? You just have to configure the port properly.??
> Note: Although you can get GPS data over a Text or KISS port, I think using the BT for GPS will prevent the MTT4BT from connecting to an APRS client over that connection.? Byon would have to confirm.
>? On Mon, May 31, 2021 at 20:47, Ron VE8RT< ve8rt@...> wrote:? Hi Robert, > ? during the summer it would reside most of the time on the bike.
> Summers here are short, so it would be multi-purposed at other times.
> The digipeating feature would likely be used, there is a single I-Node
> in town, likely its the only one in the VE8 call area, and one
> digipeater at the local high school.? There is little coverage, but it
> handles a weather station or two, and local APRS traffic.
>
> ? I was wondering if the BT would carry GPS data from the phone to the
> MTT4BT.
>
> ? ? Ron VE8RT
>
> On Mon, 31 May 2021 19:02:13 +0000 (UTC)
>
> > I would ask that you start with the features you want while cycling, rather than a broad question of what is the best installation.? The best installation is one that servers your wants at your station - in this case on a bicycle.
> > For instance:a) If you only want to send postion reports while cycling, then a simple tracker like the MT-AIO would work??? just fine.????
> > ??? Built in GPS and RF transmitter with a TT3 based tracker.
> > ??? No interface with a Android phone, EXCEPT where the phone is attached to APRS-IS
> > ??? and the phone's APRS client receives from the APRS-IS system.
> > b) MTT4BT adds many features (RX, DIGI,? BT to phone), but requires an external GPS.??? You can add a display and keyboard (probably little value on a bicycle).
> > ??? With the BT interafce to the Android phone, you add all the capability of the APRS client of the phone.??? Most APRS clients prefer KISS interface and add a lot of features, but again difficult while bicycle mobile.??? There are terminal programs available that 'should allow' you to configure the MTT4BT through BT.??? They are typically less convenient than a computer - but mostly usable.
> > When I've used my MTT4 while riding, I just stick it in a fender bag with a 1/4 wave mag mount.? Sometimes inside the same bag - at the far end, but usually the mag mount is on its own bracket.? A small (1.4Ah Power Sonic) gell battery for power.? I typically run? it at 1 to 2 watts out, and turn off DIGI functions.
> >
> > Robert Giuliano
> > KB8RCO
> >
> >
> >? ? On Sunday, May 30, 2021, 9:47:23 AM EDT, Ron VE8RT < ve8rt@...> wrote: > >
> >? Hi from Yellowknife, NT,
> >
> > ? I'm about to purchase a MTT4BT for portable use (powered by a lithium
> > battery).? Initally I plan to install it on my (recumbent) bicycle.? For
> > the bike minimal hardware (less space and weight) is the goal.? If a
> > surplus Android phone is connected by bluetooth what I can I do through
> > it, configuration? APRS texts?? In short, what is the most practical
> > hardware setup for a bicycle installation?
> >
> > ? ? Thanks,? Ron
> >
> > --
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
> --
>
>
>
>
>
>
>
>
>
>
>
--
|
Re: new here - MTT4BT on a bicycle
I have installed APRSDroid on a smart Phone (its a spare without a SIM card), I need to read up on it's features, whether it will do digipeating. For use on the bike I would do without the GPS receiver if I could, otherwise where space and wiring is less of a concern I'm OK with a GPS receiver. Now that your long weekend is about over I should get my order in for the MTT4BT. Ron On Tue, 1 Jun 2021 01:23:27 +0000 (UTC) "Rob Giuliano via groups.io" <kb8rco@...> wrote: I believe you can send GPS datz from an A droid device to the MTT4BT with an Android app like "Share GPS" (there probably are better ones) which will send the GPS data over BT.? You just have to configure the port properly.??
Note: Although you can get GPS data over a Text or KISS port, I think using the BT for GPS will prevent the MTT4BT from connecting to an APRS client over that connection.? Byon would have to confirm.
On Mon, May 31, 2021 at 20:47, Ron VE8RT<ve8rt@...> wrote: Hi Robert,
? during the summer it would reside most of the time on the bike.
Summers here are short, so it would be multi-purposed at other times.
The digipeating feature would likely be used, there is a single I-Node
in town, likely its the only one in the VE8 call area, and one
digipeater at the local high school.? There is little coverage, but it
handles a weather station or two, and local APRS traffic.
? I was wondering if the BT would carry GPS data from the phone to the
MTT4BT.
? ? Ron VE8RT
On Mon, 31 May 2021 19:02:13 +0000 (UTC)
"Rob Giuliano via groups.io" <kb8rco@...> wrote:
I would ask that you start with the features you want while cycling, rather than a broad question of what is the best installation.? The best installation is one that servers your wants at your station - in this case on a bicycle.
For instance:a) If you only want to send postion reports while cycling, then a simple tracker like the MT-AIO would work??? just fine.????
??? Built in GPS and RF transmitter with a TT3 based tracker.
??? No interface with a Android phone, EXCEPT where the phone is attached to APRS-IS
??? and the phone's APRS client receives from the APRS-IS system.
b) MTT4BT adds many features (RX, DIGI,? BT to phone), but requires an external GPS.??? You can add a display and keyboard (probably little value on a bicycle).
??? With the BT interafce to the Android phone, you add all the capability of the APRS client of the phone.??? Most APRS clients prefer KISS interface and add a lot of features, but again difficult while bicycle mobile.??? There are terminal programs available that 'should allow' you to configure the MTT4BT through BT.??? They are typically less convenient than a computer - but mostly usable.
When I've used my MTT4 while riding, I just stick it in a fender bag with a 1/4 wave mag mount.? Sometimes inside the same bag - at the far end, but usually the mag mount is on its own bracket.? A small (1.4Ah Power Sonic) gell battery for power.? I typically run? it at 1 to 2 watts out, and turn off DIGI functions.
Robert Giuliano
KB8RCO
? ? On Sunday, May 30, 2021, 9:47:23 AM EDT, Ron VE8RT <ve8rt@...> wrote:
? Hi from Yellowknife, NT,
? I'm about to purchase a MTT4BT for portable use (powered by a lithium
battery).? Initally I plan to install it on my (recumbent) bicycle.? For
the bike minimal hardware (less space and weight) is the goal.? If a
surplus Android phone is connected by bluetooth what I can I do through
it, configuration? APRS texts?? In short, what is the most practical
hardware setup for a bicycle installation?
? ? Thanks,? Ron
--
Ron VE8RT <ve8rt@...>
--
Ron VE8RT <ve8rt@...>
-- Ron VE8RT <ve8rt@...>
|
Re: new here - MTT4BT on a bicycle
I believe you can send GPS datz from an A droid device to the MTT4BT with an Android app like "Share GPS" (there probably are better ones) which will send the GPS data over BT.? You just have to configure the port properly.??
Note: Although you can get GPS data over a Text or KISS port, I think using the BT for GPS will prevent the MTT4BT from connecting to an APRS client over that connection.? Byon would have to confirm.
On Mon, May 31, 2021 at 20:47, Ron VE8RT <ve8rt@...> wrote: Hi Robert, ? during the summer it would reside most of the time on the bike. Summers here are short, so it would be multi-purposed at other times. The digipeating feature would likely be used, there is a single I-Node in town, likely its the only one in the VE8 call area, and one digipeater at the local high school.? There is little coverage, but it handles a weather station or two, and local APRS traffic. ? I was wondering if the BT would carry GPS data from the phone to the MTT4BT. ? ? Ron VE8RT On Mon, 31 May 2021 19:02:13 +0000 (UTC) "Rob Giuliano via groups.io" <kb8rco= [email protected]> wrote: > I would ask that you start with the features you want while cycling, rather than a broad question of what is the best installation.? The best installation is one that servers your wants at your station - in this case on a bicycle. > For instance:a) If you only want to send postion reports while cycling, then a simple tracker like the MT-AIO would work??? just fine.???? > ??? Built in GPS and RF transmitter with a TT3 based tracker. > ??? No interface with a Android phone, EXCEPT where the phone is attached to APRS-IS > ??? and the phone's APRS client receives from the APRS-IS system. > b) MTT4BT adds many features (RX, DIGI,? BT to phone), but requires an external GPS.??? You can add a display and keyboard (probably little value on a bicycle). > ??? With the BT interafce to the Android phone, you add all the capability of the APRS client of the phone.??? Most APRS clients prefer KISS interface and add a lot of features, but again difficult while bicycle mobile.??? There are terminal programs available that 'should allow' you to configure the MTT4BT through BT.??? They are typically less convenient than a computer - but mostly usable. > When I've used my MTT4 while riding, I just stick it in a fender bag with a 1/4 wave mag mount.? Sometimes inside the same bag - at the far end, but usually the mag mount is on its own bracket.? A small (1.4Ah Power Sonic) gell battery for power.? I typically run? it at 1 to 2 watts out, and turn off DIGI functions. > > Robert Giuliano > KB8RCO > > >? ? On Sunday, May 30, 2021, 9:47:23 AM EDT, Ron VE8RT < ve8rt@...> wrote: > >? Hi from Yellowknife, NT, > > ? I'm about to purchase a MTT4BT for portable use (powered by a lithium > battery).? Initally I plan to install it on my (recumbent) bicycle.? For > the bike minimal hardware (less space and weight) is the goal.? If a > surplus Android phone is connected by bluetooth what I can I do through > it, configuration? APRS texts?? In short, what is the most practical > hardware setup for a bicycle installation? > > ? ? Thanks,? Ron > > -- > Ron VE8RT < ve8rt@...> > > > > > > > > > > > -- Ron VE8RT < ve8rt@...>
|
Re: new here - MTT4BT on a bicycle
Hi Robert, during the summer it would reside most of the time on the bike. Summers here are short, so it would be multi-purposed at other times. The digipeating feature would likely be used, there is a single I-Node in town, likely its the only one in the VE8 call area, and one digipeater at the local high school. There is little coverage, but it handles a weather station or two, and local APRS traffic. I was wondering if the BT would carry GPS data from the phone to the MTT4BT. Ron VE8RT On Mon, 31 May 2021 19:02:13 +0000 (UTC) "Rob Giuliano via groups.io" <kb8rco@...> wrote: I would ask that you start with the features you want while cycling, rather than a broad question of what is the best installation.? The best installation is one that servers your wants at your station - in this case on a bicycle.
For instance:a) If you only want to send postion reports while cycling, then a simple tracker like the MT-AIO would work??? just fine.????
??? Built in GPS and RF transmitter with a TT3 based tracker.
??? No interface with a Android phone, EXCEPT where the phone is attached to APRS-IS
??? and the phone's APRS client receives from the APRS-IS system.
b) MTT4BT adds many features (RX, DIGI,? BT to phone), but requires an external GPS.??? You can add a display and keyboard (probably little value on a bicycle).
??? With the BT interafce to the Android phone, you add all the capability of the APRS client of the phone.??? Most APRS clients prefer KISS interface and add a lot of features, but again difficult while bicycle mobile.??? There are terminal programs available that 'should allow' you to configure the MTT4BT through BT.??? They are typically less convenient than a computer - but mostly usable.
When I've used my MTT4 while riding, I just stick it in a fender bag with a 1/4 wave mag mount.? Sometimes inside the same bag - at the far end, but usually the mag mount is on its own bracket.? A small (1.4Ah Power Sonic) gell battery for power.? I typically run? it at 1 to 2 watts out, and turn off DIGI functions.
Robert Giuliano
KB8RCO
On Sunday, May 30, 2021, 9:47:23 AM EDT, Ron VE8RT <ve8rt@...> wrote:
Hi from Yellowknife, NT,
? I'm about to purchase a MTT4BT for portable use (powered by a lithium
battery).? Initally I plan to install it on my (recumbent) bicycle.? For
the bike minimal hardware (less space and weight) is the goal.? If a
surplus Android phone is connected by bluetooth what I can I do through
it, configuration? APRS texts?? In short, what is the most practical
hardware setup for a bicycle installation?
? ? Thanks,? Ron
--
Ron VE8RT <ve8rt@...>
-- Ron VE8RT <ve8rt@...>
|
Re: new here - MTT4BT on a bicycle
I would ask that you start with the features you want while cycling, rather than a broad question of what is the best installation.? The best installation is one that servers your wants at your station - in this case on a bicycle.
For instance: a) If you only want to send postion reports while cycling, then a simple tracker like the MT-AIO would work ??? just fine.????
??? Built in GPS and RF transmitter with a TT3 based tracker.
??? No interface with a Android phone, EXCEPT where the phone is attached to APRS-IS
??? and the phone's APRS client receives from the APRS-IS system.
b) MTT4BT adds many features (RX, DIGI,? BT to phone), but requires an external GPS. ??? You can add a display and keyboard (probably little value on a bicycle).
??? With the BT interafce to the Android phone, you add all the capability of the APRS client of the phone. ??? Most APRS clients prefer KISS interface and add a lot of features, but again difficult while bicycle mobile. ??? There are terminal programs available that 'should allow' you to configure the MTT4BT through BT. ??? They are typically less convenient than a computer - but mostly usable.
When I've used my MTT4 while riding, I just stick it in a fender bag with a 1/4 wave mag mount.? Sometimes inside the same bag - at the far end, but usually the mag mount is on its own bracket.? A small (1.4Ah Power Sonic) gell battery for power.? I typically run? it at 1 to 2 watts out, and turn off DIGI functions.
On Sunday, May 30, 2021, 9:47:23 AM EDT, Ron VE8RT <ve8rt@...> wrote:
Hi from Yellowknife, NT,
? I'm about to purchase a MTT4BT for portable use (powered by a lithium
battery).? Initally I plan to install it on my (recumbent) bicycle.? For
the bike minimal hardware (less space and weight) is the goal.? If a
surplus Android phone is connected by bluetooth what I can I do through
it, configuration? APRS texts?? In short, what is the most practical
hardware setup for a bicycle installation?
? ? Thanks,? Ron
--
|
new here - MTT4BT on a bicycle
Hi from Yellowknife, NT,
I'm about to purchase a MTT4BT for portable use (powered by a lithium
battery). Initally I plan to install it on my (recumbent) bicycle. For
the bike minimal hardware (less space and weight) is the goal. If a
surplus Android phone is connected by bluetooth what I can I do through
it, configuration? APRS texts? In short, what is the most practical
hardware setup for a bicycle installation?
Thanks, Ron
--
Ron VE8RT <ve8rt@...>
|
Robert Thank you for your time and explanation. 73 Em dom., 23 de mai. de 2021 ¨¤s 22:45, Rob Giuliano via <kb8rco= [email protected]> escreveu:
Byon would have to answer for sure, but the TT4 is a microcontroller. I am pretty confident there is no formula interpreter for the TSTAT message (or any other message). I am sure the manual does not make any reference to such things.
I assume ytou are taking a temperature sensor and using amplification or some other means to improve the resolution.? Howver, if your circuit does scale the temperature range to 0 - 5V, your formula won't work. Converting the voltage range of 0 to 5V scaled as -40 to 100 degrees would require the formula to be
?? T ???????????? = ?? (^7 * 140 / 5) - 40???????? where ^7 is in volts (140 / 5 = 28). ?? -40 deg??? =??????? (0V * 28) - 40??????????? HIRES TRUE = 0? bits??????????? HIRES FALSE = 0
?? 100 deg?? =??????? (5V * 28) - 40? ????????? HIRES TRUE = 999 bits???????? HIRES FALSE = 255
???? 25 deg?? =????(2.321 * 28) - 40 ????????? HIRES TRUE = 464 bits????????? HIRES FALSE = 118
I suggest connecting your sensor to JP4 (and use ^4 for the voltage).? I don't use JP5 because the header already has a pullup to Vcc.? This could alter youyr readings.? You can read the voltage using ^4 in TSTAT or BTEXT, but it won't be converted to temperature.? For that, you can either convert the voltage manually (after a while you get a feel for Voltage to temperature), or use the Telemetry (TPeriod > 0) to convert the data in an APRS client.? Using the telemetry , you can go to and see a graph of you data.? You just set TPERIOD > 0 to send the data.? The Telemtry message is sent in bits according to TELHIRES TRUE (values are 0 - 999 for voltages between 0 and 5V).
For proper decode, you need to send the proper messages:
With? ????TELHIRES TRUE
??? TELVOLT TRUE?????????? => PA2 is reported first in the data ????TELTEMP TRUE ???????? => PA1 is reported Second in the data
You would send the following, fo all statuins to properly interpret your data: To {TT4 call-ssid}:PARM.PA2,PA1,PA5,PA4,PA3 To {TT4 call-ssid}:UNITS.Vols,degC,Volts,DegC,Volts To {TT4 call-ssid}:EQNS.A1,B1,C1,A2,B2,C2,A3,B3,C3,A4,B4,C4,A5,B5,C5
So the known equations would be: PA2 is Vin ?????? => ????? A1=0,? B1=0.0278,?? C1=0
PA1 is Tin??????? => ????? A2=0,? B2=0.5000,?? C2=-273.15 PA5 is V????????? => ????? A3=0,? B3=0.0050,?? C3=0
PA4 is Tnew??? =>?????? A4=0,? B4=0.1402,?? C4=-40
PA3 is V ???????? => ????? A5=0,? B350.0050,?? C5=0
FYI:
On the other hand, the TT4 (kit) uses an LM335. The output is 10mV / degK (pretty common for temperature sensors of this type). So, the range of the sensor is 0 - 5.00V or 0 - 500 degK => -273.15C to 226.85C
The TT4 does the calculation for ^T and ^t with that expectation. So, if you place a different sensor in its place with different scaling, the ^T and ^t would (of course) be off.
On Sunday, May 23, 2021, 6:59:09 PM EDT, py5lf_ < py5lf@...> wrote:
Robert? Sorry my mistake , its PA2 , pin 38 . There is an option to send the raw tension in the PA2 , so my idea is to use an external temperature sensor more accurately?and make scaling . For instance, the sensor gives me 0 to 5V , which means , -40 to 100 degrees . Is it possible??? Something likes this : TSTATUS = Temperature: ((^7*100)/50) Em dom., 23 de mai. de 2021 ¨¤s 18:52, Rob Giuliano via <kb8rco= [email protected]> escreveu: Not sure what you are asking.
I am not sure what PIN 2 refers to - PA2 is pin 38 whih already has a temperature sensor on it on most configurations.? If using that sensor, you can use ^T (deg F) or ^t (deg C) in the status or beacon messages. Using these escape codes, the formulas are already applied. NOTE: in firmware manual, TSTAT says "See BTEXT for excape codes." which refers to these ^ statements.
You can also use the TELTEMP to add that to the telemtry packet which you can send PARM, UNITS, and EQNS to set equations to interpret the data.? Most APRS clients handle these messages.
On Sunday, May 23, 2021, 3:44:09 PM EDT, py5lf_ < py5lf@...> wrote:
Friends Can I make some formula on the raw signal from TSTATUS , PIN 2, ^7 ? I mean , if I put?a temperature sensor , is it possible to do?some scaling?
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Byon would have to answer for sure, but the TT4 is a microcontroller. I am pretty confident there is no formula interpreter for the TSTAT message (or any other message). I am sure the manual does not make any reference to such things.
I assume ytou are taking a temperature sensor and using amplification or some other means to improve the resolution.? Howver, if your circuit does scale the temperature range to 0 - 5V, your formula won't work. Converting the voltage range of 0 to 5V scaled as -40 to 100 degrees would require the formula to be
?? T ???????????? = ?? (^7 * 140 / 5) - 40???????? where ^7 is in volts (140 / 5 = 28). ?? -40 deg??? =??????? (0V * 28) - 40??????????? HIRES TRUE = 0? bits??????????? HIRES FALSE = 0
?? 100 deg?? =??????? (5V * 28) - 40? ????????? HIRES TRUE = 999 bits???????? HIRES FALSE = 255
???? 25 deg?? =????(2.321 * 28) - 40 ????????? HIRES TRUE = 464 bits????????? HIRES FALSE = 118
I suggest connecting your sensor to JP4 (and use ^4 for the voltage).? I don't use JP5 because the header already has a pullup to Vcc.? This could alter youyr readings.? You can read the voltage using ^4 in TSTAT or BTEXT, but it won't be converted to temperature.? For that, you can either convert the voltage manually (after a while you get a feel for Voltage to temperature), or use the Telemetry (TPeriod > 0) to convert the data in an APRS client.? Using the telemetry , you can go to aprs.fi and see a graph of you data.? You just set TPERIOD > 0 to send the data.? The Telemtry message is sent in bits according to TELHIRES TRUE (values are 0 - 999 for voltages between 0 and 5V).
For proper decode, you need to send the proper messages:
With? ????TELHIRES TRUE
??? TELVOLT TRUE?????????? => PA2 is reported first in the data ????TELTEMP TRUE ???????? => PA1 is reported Second in the data
You would send the following, fo all statuins to properly interpret your data: To {TT4 call-ssid}:PARM.PA2,PA1,PA5,PA4,PA3 To {TT4 call-ssid}:UNITS.Vols,degC,Volts,DegC,Volts To {TT4 call-ssid}:EQNS.A1,B1,C1,A2,B2,C2,A3,B3,C3,A4,B4,C4,A5,B5,C5
So the known equations would be: PA2 is Vin ?????? => ????? A1=0,? B1=0.0278,?? C1=0
PA1 is Tin??????? => ????? A2=0,? B2=0.5000,?? C2=-273.15 PA5 is V????????? => ????? A3=0,? B3=0.0050,?? C3=0
PA4 is Tnew??? =>?????? A4=0,? B4=0.1402,?? C4=-40
PA3 is V ???????? => ????? A5=0,? B350.0050,?? C5=0
FYI:
On the other hand, the TT4 (kit) uses an LM335. The output is 10mV / degK (pretty common for temperature sensors of this type). So, the range of the sensor is 0 - 5.00V or 0 - 500 degK => -273.15C to 226.85C
The TT4 does the calculation for ^T and ^t with that expectation. So, if you place a different sensor in its place with different scaling, the ^T and ^t would (of course) be off.
On Sunday, May 23, 2021, 6:59:09 PM EDT, py5lf_ <py5lf@...> wrote:
Robert? Sorry my mistake , its PA2 , pin 38 . There is an option to send the raw tension in the PA2 , so my idea is to use an external temperature sensor more accurately?and make scaling . For instance, the sensor gives me 0 to 5V , which means , -40 to 100 degrees . Is it possible??? Something likes this : TSTATUS = Temperature: ((^7*100)/50) Em dom., 23 de mai. de 2021 ¨¤s 18:52, Rob Giuliano via <kb8rco= [email protected]> escreveu:
Not sure what you are asking.
I am not sure what PIN 2 refers to - PA2 is pin 38 whih already has a temperature sensor on it on most configurations.? If using that sensor, you can use ^T (deg F) or ^t (deg C) in the status or beacon messages. Using these escape codes, the formulas are already applied. NOTE: in firmware manual, TSTAT says "See BTEXT for excape codes." which refers to these ^ statements.
You can also use the TELTEMP to add that to the telemtry packet which you can send PARM, UNITS, and EQNS to set equations to interpret the data.? Most APRS clients handle these messages.
On Sunday, May 23, 2021, 3:44:09 PM EDT, py5lf_ < py5lf@...> wrote:
Friends Can I make some formula on the raw signal from TSTATUS , PIN 2, ^7 ? I mean , if I put?a temperature sensor , is it possible to do?some scaling?
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Bear Albrecht