The Wanderer 30A speaks Modbus RTU on its RS-232 port. To get it onto the network without buying Renogy's BT-1 dongle (or building an ESP32 + MAX3232), we use a serial-to-Ethernet gateway in ...
A dead-simple command-line tool for reading and writing Modbus TCP and RTU registers. Beautiful terminal UI. No GUI, no config files, no bloat.