so everything was working and then I added a photo-resistor to the Asset Tracker board and since then I have lost communication with it. GPS will blink and then find fix (with external antennae) but I do not receive data anymore.
Tried with another shield (same electron) and all is fine. I get about 3Volt from D6, so I assume I somehow wrecked the connection to serial.1 ?
If I ask Serial.1 for a simple “hello” I don’t get a print.
Is there any way to fix it? Could I use one of the other ports? I have removed all the offending parts but the problem persists