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NanoVNA does not want to start.
Hi group. I received my black NanoVNA a few days ago.
This turned out not to want to start after unpacking.
I thought the battery was empty, so I connected it to the USB charger.
He wanted to start up immediately on the USB. The battery was charged very quickly.
After disconnecting the USB, I wanted to start up again, which never did not work.
He worked on the USB cable, so I worked on the USB cable all day.
My colleagues with other NanaVNAs (including the white ones) apparently also had battery problems.
On the forum in message # 639 there is mention of adding C38, but it is already there with me (see photo), and gives no solution.
The following day I did further tests, with strange results:
- I can boot with the USB cable, but not with the battery.
- after removing the USB cable, I was able to continue working on the battery for another 2 hours.
The battery was not defective, I just could not start it.
I then did some research for the following.
Once the NanaVNA runs on the battery, and then is turned OUT, the blue LED lights up for another 40 seconds. I already wondered why that is in the manual.
This means that the IP5306 controller then goes into Deep Sleep Mode.
That happens when less than 45 mA is used to save the battery.
The strange thing is that as long as the LED is on, I can start up normally with a battery.
Once the LED is off, and the IP5306 is in Sleep Mode, I cannot boot anymore.
According to the datasheet this is normal, and the IP5306 cannot be activated in sleep mode!
Unless: disconnect the battery, and back on, or at least a consumption of >45mA must be seen again, and apparently that does not work with the NanoVNA.
The battery cannot be disconnected from the Nano, which is according to the diagram directly on the IP5306. Note: if the NanoVNA is off, the battery consumption of 4 to 5 mA is still on the high side.
A consumption of >45mA is probably not yet available at start-up, so that the IP5306 does not come from sleep mode.
If you look at the diagram, the IP5306 has a pin 5 (key) that is not connected.
With this, however, you can put the controller in the normal load mode or get it out of sleep mode.
As a solution I have placed a micro push switch (glued) on connector P2 between GND and SWCLK.
On SWCLK I place a SMD resistor of 10K in series and with a wire I go to pin5 (key) of the IP5306.
In this way I can now do the following:
- I press the micro switch briefly 1x, the blue LED lights up and then I switch on the on / or switch, and see: the Nano starts up!
- I press the micro switch twice briefly, and the blue LED and the Nano go OFF again. Also switch OFF the on / off switch. This was the minor modification.
The photo of this modification can be found in the attachment.
Hopefully many have been helped with this.
Grts, on1bes Herman
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Thanks for the fix, Herman.
I had added the cap on the DSP reset line and it seemed to work for me but I did notice the strange way that the inverter chip worked.
I wonder if we can just do away with the power switch and add your circuit to turn the unit on and off.
Cheers
Larry
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Herman, your figure of 4 to 5 mA with the nanovna Off looks very high. If you assume a battery of one to two amper-hours then this will discharge in less than 2 weeks! Most users, including myself, have received our nanovna after 3 weeks in the post and found them ready to go when the switch was operated. May I suggest that you look as to why it is consuming 4-5 mA when off. (Not an easy task but look to possible wrong polarity on electrolytic capacitors as they can draw this sort of drain. With the missing current adding up to 15mW of power, it might just show up on a top grade thermal camera if you can find one with a 0.1 C resolution or better.)
I have looked for a IP5306 data sheet in English but failed to find one. Looking at a Chinese one, which language I have no ability at all, I see the figure of 50uA which may be the off current. This would mean a possible 4 years to deplete the battery. Any Chinese speaker able to confirm this, or otherwise.
Regards, Brian.
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On 13 Aug 2019, at 01:29, Herman De Dauw <on1bes@...> wrote:
NanoVNA does not want to start.
Hi group. I received my black NanoVNA a few days ago.
This turned out not to want to start after unpacking.
I thought the battery was empty, so I connected it to the USB charger.
He wanted to start up immediately on the USB. The battery was charged very quickly.
After disconnecting the USB, I wanted to start up again, which never did not work.
He worked on the USB cable, so I worked on the USB cable all day.
My colleagues with other NanaVNAs (including the white ones) apparently also had battery problems.
On the forum in message # 639 there is mention of adding C38, but it is already there with me (see photo), and gives no solution.
The following day I did further tests, with strange results:
- I can boot with the USB cable, but not with the battery.
- after removing the USB cable, I was able to continue working on the battery for another 2 hours.
The battery was not defective, I just could not start it.
I then did some research for the following.
Once the NanaVNA runs on the battery, and then is turned OUT, the blue LED lights up for another 40 seconds. I already wondered why that is in the manual.
This means that the IP5306 controller then goes into Deep Sleep Mode.
That happens when less than 45 mA is used to save the battery.
The strange thing is that as long as the LED is on, I can start up normally with a battery.
Once the LED is off, and the IP5306 is in Sleep Mode, I cannot boot anymore.
According to the datasheet this is normal, and the IP5306 cannot be activated in sleep mode!
Unless: disconnect the battery, and back on, or at least a consumption of >45mA must be seen again, and apparently that does not work with the NanoVNA.
The battery cannot be disconnected from the Nano, which is according to the diagram directly on the IP5306. Note: if the NanoVNA is off, the battery consumption of 4 to 5 mA is still on the high side.
A consumption of >45mA is probably not yet available at start-up, so that the IP5306 does not come from sleep mode.
If you look at the diagram, the IP5306 has a pin 5 (key) that is not connected.
With this, however, you can put the controller in the normal load mode or get it out of sleep mode.
As a solution I have placed a micro push switch (glued) on connector P2 between GND and SWCLK.
On SWCLK I place a SMD resistor of 10K in series and with a wire I go to pin5 (key) of the IP5306.
In this way I can now do the following:
- I press the micro switch briefly 1x, the blue LED lights up and then I switch on the on / or switch, and see: the Nano starts up!
- I press the micro switch twice briefly, and the blue LED and the Nano go OFF again. Also switch OFF the on / off switch. This was the minor modification.
The photo of this modification can be found in the attachment.
Hopefully many have been helped with this.
Grts, on1bes Herman
<NanoVNA_startup.jpg>
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The chip used is actually an IP5303 (per the schematic) and I too have not been able to find an English copy - you can always translate chunks of text with Google translate though.
The quiescent current is in the uA range.
As for turn on issues that I have also seen, I will be placing a 10uF cap at the input to the 3v regulator so that when switched-on, there will be a momentary current spike.
Hopefully, that will get the chip to turn on.
Larry
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Brian, Larry, a little correction. The 4mA consumption is with another Nano from a friend, and yes, he had an empty battery on receipt. I don't know why yet. In the meantime I have measured my unit consumption. The values are as follows:
PWR switch is OFF: 0.59 mA
PWR switch is ON, but Nano is not started: 0.64 mA
Started up with the new micro-switch :
Nano power-up: 182.8 mA
Nano goes in sleep mode (40 sec LED) set the PWR switch OFF: 3.83 mA
My values seem normal.
I do have a translated version of the IP5603, See link below.
If you want to know more about the strange behavior of the IP5303,
then we are not alone. The same problems are with a battery pack - see the M5Stack Community.
Link:.
You will also find the English translation of the IP5303 there.
Success
Herman
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Thanks for the link, but maybe you could post the file here in the files section so we don't have to register on yet another forum?
Although this is for the IP5306, the NanoVNA uses the IP5303 and the pinout is slightly different but the specs are the same.
I tried putting a 10uF cap on the input to the 3v regulator but that didn't work - in fact, when the inverter went to sleep almost no load would wake it up.
So - I added the 10K resistor and button sw and use that to turn my unit on-off now.
Larry
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I found a short write-up on the 5306 specs & on/off functions at :
IP5306 Datasheet ¨C Mobile Battery Power SOC
Posted on April 27, 2018 by Pinout
Part Number : IP5306
Function : 2.1A Charging 2.4A Discharge Highly Integrated Mobile Power SOC
Package : ESOP 8 Pin type
Manufactures : Injoinic Corp ( )
Description
The IP5306 is a multi-function power management SOC with an integrated boost converter, lithium battery charge management, and battery power indication, providing a complete power solution for mobile power supplies.
The high integration and rich features of the IP5306 make it possible to use only a few external components in the application and to effectively reduce the overall solution size and BOM cost.
Features
1. Synchronous switch charge and discharge
2. 2.4A Synchronous Boost Converter, 2.1A Synchronous Switch Charge
3. Boost efficiency up to 92%
4. Up to 91% charge efficiency
Applications
1. Mobile Power / Charging Po
2. Mobile phones, tablet PCs and other portable devices
Power control Using Key method
The IP5306 recognizes long and short key operation, and pin 5 is floating when no key is needed.
1. The key duration is longer than 50ms, but less than 2s, which is a short press action. Short press will turn on the power indicator and boost output.
2. The duration of the button is longer than 2 seconds, which means long press action. Long press will turn on or off the lighting LED.
3. The keystrokes less than 50ms will not have any response.
4. Pressing the button for two consecutive times in 1s will turn off the boost output, battery display, and lighting LED.
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I noticed this phenomenon, which may be capacitor problems, and replacing all 10uf (C1 45 46 49) and 22uf (C47) capacitors can resolve the issue. You can try it, good luck!
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You are right, the PDF is from the IP5306, but the pin 5 commands work the same. I post it anyway.
It is a good alternative. I no longer need the on/off switch.
cheers,
Herman ON1BES
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Hello all-
I ordered a NanoVNA on eBay and received a black version in a plastic case with mixer shielding and accessories (cables and calibration kit). Mine was like Herman's; it would boot when powered via USB but would not boot via the battery using the ON/OFF switch even when 'fully charged' with the blue charge indicator full-on (without flashing). I read Herman's post and wondered if maybe the IP5303's 'KEY' function state is not guaranteed when leaving the chip factory. So I found a junkbox leaded 10K resistor, bent the leads into a 'U', and touched one end to the battery minus (i.e. IP5303 ground/EPAD) and the other to the IP5303 'KEY' pin (pin 5) for about 1 second. The blue charge indicator came full-on for about 30 seconds, then switched off. But now it boots via battery using the ON/OFF switch! I don't know how long this state will persist- perhaps until the battery discharges completely or is disconnected. This may also have implications for people who received units which functioned normally upon arrival- if their battery goes completely flat, does the IP5303 go into a sleep state requiring the 'KEY' pin to be pulled down 'briefly' via a 10K resistor? I don't know the answer. Anyway, thank you Herman for the fix!
73, Joe F. KC8RKL
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Hello All,
My nanoVNA did not exhibit these problems, and from delivery some weeks ago, has always started whether on a Power Supply or on Battery alone.
However one thing strikes me when people are talking about this condition is that the 'faulty' ones all seem to have blue LED's in them! Mine has red LED's. I know this may sound a bit silly, but is it due to the type of LED's used in these units the real cause of the problem? Remembering that different coloured LED's have completely different 'lit' voltages. This voltage variation could cause faulty operation of the IP5303?
FWIW
73's Pete ZL2iK
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-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Joe F. KC8RKL Sent: Thursday, 15 August 2019 06:44 To: [email protected]Subject: Re: [nanovna-users] NanoVNA does not want to start -solved Hello all- I ordered a NanoVNA on eBay and received a black version in a plastic case with mixer shielding and accessories (cables and calibration kit). Mine was like Herman's; it would boot when powered via USB but would not boot via the battery using the ON/OFF switch even when 'fully charged' with the blue charge indicator full-on (without flashing). I read Herman's post and wondered if maybe the IP5303's 'KEY' function state is not guaranteed when leaving the chip factory. So I found a junkbox leaded 10K resistor, bent the leads into a 'U', and touched one end to the battery minus (i.e. IP5303 ground/EPAD) and the other to the IP5303 'KEY' pin (pin 5) for about 1 second. The blue charge indicator came full-on for about 30 seconds, then switched off. But now it boots via battery using the ON/OFF switch! I don't know how long this state will persist- perhaps until the battery discharges completely or is disconnected. This may also have implications for people who received units which functioned normally upon arrival- if their battery goes completely flat, does the IP5303 go into a sleep state requiring the 'KEY' pin to be pulled down 'briefly' via a 10K resistor? I don't know the answer. Anyway, thank you Herman for the fix! 73, Joe F. KC8RKL
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Well ...I bought 2 ...One from Guangyi0016 (has red leds) and one from hugan (has blue leds) ...both look/work/calibrate identical ..shields on both are open ends..
Jim
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On Wednesday, August 14, 2019, 8:57:59 PM UTC, Peter Mulhare <peter@...> wrote: Hello All, My nanoVNA did not exhibit these problems, and from delivery some weeks ago, has always started whether on? a Power Supply or on Battery alone. However one thing strikes me when people are talking about this condition is that the 'faulty' ones all seem to have blue LED's in them!? Mine has red LED's.? I know this may sound a bit silly,? but is it due to the type of LED's used in these units the real cause of the problem?? Remembering that different coloured LED's have completely different 'lit' voltages.? This voltage variation could cause faulty operation of the IP5303? FWIW 73's Pete ZL2iK -----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Joe F. KC8RKL Sent: Thursday, 15 August 2019 06:44 To: [email protected]Subject: Re: [nanovna-users] NanoVNA does not want to start -solved Hello all- I ordered a NanoVNA on eBay and received a black version in a plastic case with mixer shielding and accessories (cables and calibration kit). Mine was like Herman's; it would boot when powered via USB but would not boot via the battery using the ON/OFF switch even when 'fully charged' with the blue charge indicator full-on (without flashing). I read Herman's post and wondered if maybe the IP5303's 'KEY' function state is not guaranteed when leaving the chip factory. So I found a junkbox leaded 10K resistor, bent the leads into a 'U', and touched one end to the battery minus (i.e. IP5303 ground/EPAD) and the other to the IP5303 'KEY' pin (pin 5) for about 1 second. The blue charge indicator came full-on for about 30 seconds, then switched off. But now it boots via battery using the ON/OFF switch! I don't know how long this state will persist- perhaps until the battery discharges completely or is disconnected. This may also have implications for people who received units which functioned normally upon arrival- if their battery goes completely flat, does the IP5303 go into a sleep state requiring the 'KEY' pin to be pulled down 'briefly' via a 10K resistor? I don't know the answer. Anyway, thank you Herman for the fix! 73, Joe F. KC8RKL
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<My apologies for the duplication below of some of Larry's earlier message. Henceforth, I will read *all* messages in a thread before posting>
Hello again-
I found further information on the IP5306 IC, which (as I believe Herman mentioned) appears to be virtually identical to IP5303 but with higher current capacity:
The above link describes the functional states available via the IC5306's 'KEY' pin as follows:
----------------<snip>------------------
Key method
The IP5306 recognizes long and short key operation, and pin 5 is floating when no key is needed.
1. The key duration is longer than 50ms, but less than 2s, which is a short press action. Short press will turn on the power indicator and boost output.
2. The duration of the button is longer than 2 seconds, which means long press action. Long press will turn on or off the lighting LED.
3. The keystrokes less than 50ms will not have any response.
4. Pressing the button for two consecutive times in 1s will turn off the boost output, battery display, and lighting LED.
----------------<end snip>------------------
When I manually connected a 10K resistor between pin 5 and ground for 1 second, apparently this put my IP5303 into the state induced by 1) above, enabling [battery] boost output. I believe my unit arrived here in the state induced by 4) above, with [battery] boost output switched off. Roughly 24 hours later, my ON/OFF switch is still functioning normally (the unit boots from both USB and battery power). I have no clue as to how long this 'normal battery function' state will persist, nor how battery current draw varies among the above states- I guess time will tell...
73,
Joe F. KC8RKL
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after few days without any issues my nanovna stopped to work properly, the IP5303 seems to have issues. What really interessting, it worked with no issues (lot of charge/discharge cycles , lot of power ups from sleep), all i did was to flash latest fw, solder D2 and connect back liion battery. Once turned off, it didn't come back. So i tried full battery discharge/charge cycle, unsoldered again, but no fix, the IP5303 need now always wakeup via key pin (pin 5).
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Yeah, I have the same issue with the white Gecko nanoVNA I bought back in June.
I turn it on using a push button connected to pin 5.
Of course, according to Hugen, you need to replace the 10uF caps around the ip5303 with good quality parts.
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all caps replaced, inductor as well, i found even recommended parts, but still it does not work anymore. By closer look on the design, well, it works exactly as it should - it is power bank IC, it does power on with click on key, and power off with double click on key, while charging key is not working. So i added key button and happy with it.
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With all that new firmware, I now work a lot with the NanoVNA connected to the PC. With my modification in message # 967 I can start the NanoVNA with the placed switch on the IP5303.
But once connected via USB to the PC, that is no longer possible. As soon as the USB is connected to the PC, I can no longer start up, and the circuit of the IP5303 no longer works.
When disconnecting the USB and reconnecting, the NanoVNA will start up, but then the running PC program will be interrupted. Someone a solution?
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Edit:
A warning. I was inspired to use another USB-C cable. Very strange is that with the supplied USB (black) cable the NanoVNA won't start connected to the PC.
I did a test with a self-purchased (white) USB-C cable, and guess what: the NanoVNA will now start up if it is connected to the PC when I press the PWR switch.
So be careful with the supplied USB cable.
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The IP5303 chip turns on when the load is connected.
Connect a 20-100 ohm resistor to terminal 8 and the GND, if switching on does not occur, replace IP5303.
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Placing a 20 - 100 ohm resistor has not brought a solution. The IP5303 will not start wiyh the SW1 switch.
Also, as a test with a 6V / 3W light bulb on the load pin 8, it will not start. Here the load must still be sufficient. With pin5 I can start the IP5303, and the light is on, but after the 45sec sleep time, restarting no longer works with the pwr switch. I will have to search for another solution. I am thinking of a larger C3 capacitor, so that when the SW1 is closed, there is a larger charge current for a while. I'm also going to look up more circuits with the IP5303.
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Peter Mulhare