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Re: new here - MTT4BT on a bicycle
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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
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=[email protected]> 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=[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@...> > > > > > > > > > > > -- Ron VE8RT <ve8rt@...> |
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