LED indicator 2G or 3G

Firmware
1

Hi all

I have a problem: I want that a LED is ON as long as 3G is available. If only 2G (fallback) is available the LED should be off. How can I do this? Any ideas?

2

You’d need to use the respective AT commands via Cellular.command().
To find out which commands are needed for that, you’d need to look in the ublox datasheet.

But IIRC @rickkas7 had something similar in his drawer a while back :wink:

3

If you use the CellularHelper library (also in the community libraries), this code should work:

#include "Particle.h"

#include "CellularHelper.h"

void setup() {
	Serial.begin(9600);
	pinMode(D7, OUTPUT);

	waitUntil(Cellular.ready);

	CellularHelperEnvironmentResponseStatic<1> resp;
	CellularHelper.getEnvironment(CellularHelperClass::ENVIRONMENT_SERVING_CELL, resp);
	if (resp.resp == RESP_OK) {
		if (resp.service.isUMTS) {
			Serial.printlnf("is3G=true");
			digitalWrite(D7, HIGH);
		}
		else {
			Serial.printlnf("is3G=false");
		}
	}
	else {
		Serial.printlnf("getEnvironment returned error %d", resp.resp);
	}
}

void loop() {
}

You may want to do this every few minutes, in case the Electron is moving around.