SIM card not detected in RAK8212

. Is there a simple script that would just take strings from the serial or BLT interface, forward verbatum to the module and show whatever comes back?

Something like:

Bluetooth.on('data', d=>Serial1.write(d));
Serial1.on('data', d=>Bluetooth.write(d));
LoopbackA.setConsole();

But you'll no longer be able to control Espruino unless you disconnect and reconnect. You can't use Serial because the nRF52 only has one serial port, which is needed for the modem.