GNSS Example not working

[rchancey]

@fabiopi-tlt Sorry to add a second issue but the GNSS example is not working either. I paste the results below.. it is not getting a position. Could this be related to the SMS issue we are having?

Telit Test AT GNSS command ME310 ON AT Command AT

VALID$GPSCFG: 1,1,1,1 OK OK OK $GPSACP: ,,,,,0,,,,, $GPSACP: ,,,,,0,,,,, $GPSACP: ,,,,,0,,,,, $GPSACP: ,,,,,0,,,,, $GPSACP: ,,,,,0,,,,, $GPSACP: ,,,,,0,,,,, $GPSACP: ,,,,,0,,,,, $GPSACP: ,,,,,0,,,,, $GPSACP: ,,,,,0,,,,, $GPSACP: ,,,,,0,,,,, $GPSACP: ,,,,,0,,,,, $GPSACP: ,,,,,0,,,,,

[fabiopi-tlt]

hello, this example is not from this repository, but from this one: https://github.com/telit/arduino-me310-library. In any case, the sketch output shows what the AT command is reporting, and it is likely that the device is not getting a fix. are you in a open sky condition?

This library provides a dedicated class for GNSS: https://github.com/telit/arduino-tlt-library/blob/main/src/TLTGNSS.cpp

it is used in this project https://github.com/telit/arduino-charlie-elderly-monitor-sample And a sketch to use it could be as below:

#include <TLTMDM.h>

ME310* _me310 = new ME310();

/*When NMEA_DEBUG is false Unsolicited NMEA is disabled*/
/*NMEA is true*/
TLTGNSS gnss(_me310, true);

void setup()
{
  memset(accel_setting, 0, sizeof(struct bma400_sensor_conf));

  Serial.begin(115200);
  _me310->begin(115200);
  delay(1000);
  _me310->powerOn();
  delay(5000);
  Serial.print("Initializing GNSS");
  while(!gnss.setGNSSConfiguration())
  {
    Serial.print(".");
  }
  Serial.println(" is completed successfully");
}

void loop()
{
    GNSSInfo gnssInfo = gnss.getGNSSData();
   /*gnssInfo fields will have latitude, longitude and the other details in string format*/
}

[rchancey]

I am in my house and not in open air. I intend to use the Arduino MKR GPS shield because last I checked the GNSS is not very accurate... but I think getting GNSS to work is a key step to prove the board is working. The sketch you share is not complete but I will try to make it work. Support has contacted me and asked me to send some additional commands. Perhaps an issue with board is preventing this from working as well?

[rchancey]

By changing the AT#FWSWITCH=1 for Verizon.. I was able to get results from the GNSS. accuracy sucks.. but at least getting data now.. Support is still helping why I had to set this to 1.

I get this result: OK $GPSACP: ,,,,,0,,,,, $GPSACP: ,,,,,1,,,,, $GPSACP: 162458.000,3032.8168N,09751.3496W,1.2,321.3,3,0.0,0.0,0.0,131021,05 $GPSACP: 162511.000,3032.8180N,09751.3487W,1.2,328.0,2,0.0,0.0,0.0,131021,05 $GPSACP: 162524.000,3032.8178N,09751.3493W,1.2,326.3,3,0.0,0.0,0.0,131021,05 $GPSACP: 162537.000,3032.8177N,09751.3490W,1.2,327.0,3,0.0,0.0,0.0,131021,05 $GPSACP: 162550.000,3032.8172N,09751.3489W,1.2,328.5,3,0.0,0.0,0.0,131021,04 $GPSACP: 162603.000,3032.8171N,09751.3485W,1.2,329.9,3,0.0,0.0,0.0,131021,05 $GPSACP: 162616.000,3032.8169N,09751.3483W,1.2,330.7,3,0.0,0.0,0.0,131021,04 $GPSACP: 162629.000,3032.8168N,09751.3481W,1.3,330.9,2,0.0,0.0,0.0,131021,04 $GPSACP: 162642.000,3032.8167N,09751.3480W,1.2,331.2,3,0.0,0.0,0.0,131021,04 $GPSACP: 162655.000,3032.8164N,09751.3479W,1.3,331.6,2,0.0,0.0,0.0,131021,05

[rchancey]

@fabiopi-tlt I was able to get your example working.. but the coordinates are not right somehow. Do I need to do some sort of conversion?

I am getting : 3032.8155N 09751.3500W when I should be getting something like : 30.5469437, -97.8557968

seems 2 decimals off somehow?

here is my sketch:

include

include

define USER_PB 6 / SAMD21 PIN nr. 7 /

define USER_LD 7 / SAMD21 PIN nr. 21 /

define DEBUG 0

ME310 *_me310 = new ME310();

/When NMEA_DEBUG is false Unsolicited NMEA is disabled/ /NMEA is true/ TLTGNSS gnss(_me310, true); void setup() {

Serial.begin(115200); _me310->begin(115200); delay(1000); _me310->powerOn(); delay(5000); Serial.print("Initializing GNSS"); while (!gnss.setGNSSConfiguration()) { Serial.print("."); } Serial.println(" is completed successfully"); }

void loop() {

Serial.println("Getting GNSS Data!"); GNSSInfo gnssInfo = gnss.getGNSSData(); Serial.print(gnssInfo.latitude.c_str()); Serial.print(","); Serial.println(gnssInfo.longitude.c_str());

Serial.println("long"+gnssInfo.longitude); Serial.println("alt"+gnssInfo.altitude); Serial.println("fix"+gnssInfo.fix); Serial.println("utc"+gnssInfo.utc); Serial.println("Ready for another run!"); delay(10000); }

[fabiopi-tlt]

@rchancey that format is NMEA, straight from the sentences. It is actually where you expected if you convert them (for example: http://www.hiddenvision.co.uk/ez/?nmea_lat=3032.8155N+&nmea_lon=09751.3500W ).

We pushed a new TLT library version which includes a TLTGNSS example, providing also the output in decimal and DMS formats

[rchancey]

This is fantastic and the new example is awesome. Thank you @fabiopi-tlt !