GPS_tracker: example code (solutions)

[JeroenKl (Jeroen)]

Dear RAK support team,

I’m trying to get the GPS_tracker code running with the example solution code provided:

RAKWireless/WisBlock

It works fine only when the Serial port tool IDE is opened and starts logging:

When booting the WisBlock without Serial port tool, it is not working. (standalone)

any advice?

BR, Jeroen

[carlrowan]

Hi Jeroen,

With not working, do you mean no uplink data was sent to TTN? Or just no GPS data?

Also, did you get a GPS fix (good GPS coordinates) on the serial terminal?

[JeroenKl (Jeroen)]

Hi Carl,

With not working I mean nothing happens, no first TTN join request etc.

As soon as I open a serial logger console in IDE the tracker starts up and first join request is sent

Only after that, yes a GPS Fix is seen and sent when ’ twisting’ the device as described according the manual.

BR, Jeroen

Outlook for Android downloaden

[beegee (Bernd Giesecke)]

Hi Jeroen,
The problem is in the example code.

	// Initialize Serial for debug output
	Serial.begin(115200);
	while (!Serial)
	{
		delay(10);
	}

Will wait forever when no USB cable is plugged in. We need to correct the example codes and change this.
I personally do like:

	// Initialize Serial for debug output
	Serial.begin(115200);

	time_t timeout = millis();

	while (!Serial)
	{
		if ((millis() - timeout) < 5000)
		{
			delay(100);
		}
		else
		{
			break;
		}
	}

which waits 5 seconds and if no Serial is detected just continuous.

[JeroenKl (Jeroen)]

Thanks for the fast reply.
Yes this did the trick (ofcourse).

BR, Jeroen