ModbusAdapter Adds Modbus TCP over WIFI to a Modbus RTU Serial device Please refer to the ModbusAdapter wiki for more information. Parts ESP32 Dev Module RS232 Interface Module Wiring diagram RS232 Interface Module ESP32 VCC 3.3V RX GPIO16 (RX2) TX GPIO17 (TX2) Gnd Gnd RJ11 to male DE-9 connector Cable ModbusAdapter home page ModbusAdapter configure page *** Use admin/ModbusAdapter to access setup Use the ClassicMonitor android app to view your data *** Connect to the ModbusAdapter IP Address