Troubleshooting guidance

[MovingSymbols]

I've stuck a 2032 battery into my ggtag but can't sound program, it doesn't seem to respond at all.

1. Insert battery
2. Flip switch from USB to BATT
3. Small green LED lights up
4. Use sound programming app @ ggtag.io (and from mobile phone with app) with HELLO WORLD
5. ggtag doesn't respond, tried pressing button (LED turns off) and repeating, tried closer/louder, no response on ggtag.

Expected behavior: ggtag displays HELLO WORLD

I can't find any documentation on what the button actually does, or what the small LED indicates (listening?) The documentation and videos don't show the entire process from beginning to end (e.g. unpacking, insert battery, sound program from web page or app) so I can't really tell if I'm doing something wrong, or if I should be troubleshooting somehow.

[rgerganov]

The led indicates whether ggtag is working on battery (green light) or USB power (red light). The button is used to make ggtag start listening again after successful sound programming. If the led turns off (without flipping the switch), then most probably your battery is low. I suggest to try again with a brand new battery.

You can find some examples for programming the device here

[MovingSymbols]

Well, I connected a fresh battery (tested 3.2V) and the green LED stays on but the ggtag still doesn't seem to respond to sound programming.

The sound programming attempt (from ggtag.io) seems valid, because the waver android app receives the message OK when listening.

I was able to program over USB as a test, so that works. But I am not sure what to try next yet.
One thing I noticed that is different from the video in the link provided is that my green LED is nowhere near as bright as in the video.

Maybe I should try bypassing the battery and feed 3.3V direct from an external power supply as a test, just in case the battery connection or something is flaky.

[rgerganov]

Hm, if the battery has enough power then this is really strange.

If you have a USB to Serial adapter, you can connect it to the RX,TX,GND test points on your GGtag and get some debug messages from there.

[MovingSymbols]

OK, thanks for the tip. Something is definitely odd.

I sort of think the battery is making poor contact, because the green LED lighting up is dependent on the battery being inserted just so. But the green LED is also dim and of varying brightness. It's enough to make me suspect a mild short, or something, but it's hard to tell.

I'll try getting debug messages using the method you describe, maybe that will yield new information.