Comments (4)
Maybe this can help you: https://github.com/eriktheV-king/TTGO_T-beam_GPS-reset
If the red LED nearby the GPS-module doesn't flash, look at the GPS-antenna its cable or its connector. If you choose the wrong T-BEAM version (0.7 instead of 1.0) there might be no power-supply for the GPS-module.
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Thanks for your reply, seems that I was able to run the GPS reset properly, watching the monitor... but still can't get any GPS info. I put the tbeam board in my window, all night without any success (yesterday afternoon it got the date but no position info and the GPS led has been turned off).
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For what it's worth, I saw similar behavior with the V1.1 and was convinced the GPS was faulty. It wasn't.
The antenna does seem to be kind of weak, though, and I often find I need to place the device outside with a view of the sky to have it pick up a signal. Being in a window didn't cut it.
This could be coincidental timing but after I added an 18650 battery, the device seemed to keep track of the GPS signal better in my tests, even in a car (red LED blinking next to the GPS chip, etc).
I ended up making a change to the code to have it print the GPS sentences to the console (via the 'Upload and Monitor' feature in PlatformIO):
@@ -118,13 +120,13 @@ void loop() {
if (Config.debug) {
while (Serial.available() > 0) {
char c = Serial.read();
- // Serial.print(c);
+ Serial.print(c);
gps.encode(c);
}
} else {
while (ss.available() > 0) {
char c = ss.read();
- // Serial.print(c);
+ Serial.print(c);
gps.encode(c);
}
}
I'd then get the $GPGSV
sentences in the console, where I could look at the fourth field to see the number of satellites it saw, even if it's not actually using them until $GPGGA
fields get populated. This takes a bit as the GPS chip seems to need time to start accepting the satellites it sees.
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@wolfpcgn @ccmolik Hi fellows... problem solved. The issue was the GPS antenna. I changed the ceramic antenna and replaced it with an external one and it started to work.
Thanks for your help !
Best regards,
-David, XE2AD.
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