Selected Pepwave MAX routers feature a RS-232 serial interface on the built-in terminal block. The RS-232 serial interface can be used to connect to a serial device and make it accessible over an TCP/IP network.
The serial interface can be enabled and parameters can be set on the web admin page under Advanced > UART. Make sure they match the serial device you are connecting to.
There are 4 pins i.e. TX, RX, RTS, CTS on the terminal block for serial connection and they correspond to the pins in a DE-9 connector as follow.
|DE-9||Pepwave MAX Terminal Block|
|Pin 2||Rx (rated -+25V)|
|Pin 3||Tx (rated -+12V)|
The RS232 serial interface is not an isolated RS232. External galvanic isolation may be added if required.
Be sure to check whether your serial cable is a null modem cable, commonly known as crossover cable, or a straight through cable. If in double, swap Rx and Tx, and RTS and CTS, at the other end for a try.
Once connected, your serial device should be accessible on your Pepwave MAX router LAN IP address at the specified TCP port.