I’m using raspberry pi to dial the modem via the main UART port.
Is it possible to get the signal level while the connection is already established?
Seems the modem is not responding to the AT commands if the connection was established.
You can use ordinary usb port for ppp, so that more ports are used, so you can use at command to query signal strength. I will test the scenario you mentioned later to see if there is a way to query, thank you.