I am trying to communicate via UART with BG96 but it doesn’t react for any command.
The Status output is high, Net Status is “blinking”, the power supply is 3.78V but I can’t see anything on any UART interface.
USB port is connected to SoM module with Linux. In Linux I don’t see any device that corresponds to BG96.
Looks like you are using transistors to communicate over UART interface. We have same setup like you. Good idea. In that case, any TTL or logic convertors are not required to use.
So you need to check TTL voltage(1.8V, 3.3V?) of your linux board. Your COM port settings are true.
In Linux side, you can see usb events with type “dmesg” command to terminal. If you see anything to after plug into usb of your linux board, maybe Linux drivers for your modem not installed.