No GPS FIX

[cvanaalst]

Hi,

I installed your software on my TTGO TBEAM (T22 v1.0 20190612) - I cannot get a GPS fix; connection to TTN works fine (I forced checkGpsFix() to true - and it sends packages). I know that the GPS works; I have installed Meshtastic (pre-built binary) on the TTGO and the GPS worked - but I have been trying various GPS examples (TinyGPS & TinyGPS++) , but I cannot get a fix ? So I assume it has something to do with the wrong TinyGPS++.h library or board. I am trying to figure out how I can see whether I have really no fix or whether I am not communicating with the NEO M8N GPS chip. I have 2 TTGO's , bith give me the same result. (one T22 v1.0 20190612 and one T22 v1.1 20191212)

added on 3/7/2020: I have discovered that I am not getting any data from the GPS: I am getting the "GPS INIT", but I am not getting any '.' printed, so I assume that the serial connection is not available ?

`void gps::init() { GPSSerial.begin(9600, SERIAL_8N1, GPS_TX, GPS_RX); GPSSerial.setTimeout(2); Serial.println("GPS INIT !"); }

void gps::encode() {
int data; unsigned long previousMillis = millis();

while((previousMillis + 100) > millis()) {
    while (GPSSerial.available() ) {
        char data = GPSSerial.read();
        tGps.encode(data);
        //Serial.print(data);
        Serial.print(".");
    }
}
Serial.println("");

}`

any help is usefull

regards,

Chris

[schroepfer]

I have exactly the same Problem!

[cvanaalst]

I've ordered 2 new T22 v1.0 20190612 boards with the NEO -6M (older type - I had the M8N) GPS and I get exactly the same issue; the GPS is not responding - again a pre-built Meshtastic binary is working (good GPS fix), but not my own compiled version. So it must be a library-issue ... Can you provide me with the exact library versions you use ? On a seperate PC I will install a fresh Arduino and all the lib's ...

Chris

[schroepfer]

..i think, noppingen is no more working on this project

[cvanaalst]

well, it's a pity; there must be a library issue: I have installed PlatformIO (planning to do that for quite some time) and I am trying to get the GPS working on the T-beam. Whatever example I try it is not working .... I inistalled the Meshtastic project in PlatformIO and I am trying to go thru the code to see what is different ... must be something stupid ... Advantage of PlatformIO is that you can have different libs (& versions) per project, this will allow me to test several diff lib-versions ... @schroepfer if you get it to work, let me know ! Chris

[schroepfer]

I did the same, like you! Only Meshtastic work.