Hi!
I tried to find information on The Electron - Asset tracker combo and the way the modem / GPS is connected. More specifically, if the modem / GPS takes up a serial interface or both Serial1 and Serial2 are available to use.
Thanks in advance.
Tamas
From: https://docs.particle.io/datasheets/particle-shields/#using-the-asset-tracker
The GPS is connected to the Serial1 UART on the Electron
Hi! thanks for replying. This means that according to the documentation, is also has Serial2 and Serial3 free, right?
That sounds correct.
Are you talking about the hardware USARTs or the respective objects in code?
If you mean the latter, there is no Serial3 but Serial4 and even Serial5 but while Serial2 is available you’ll have little joy in using it 
Have a look
https://docs.particle.io/reference/firmware/electron/#serial