Make possible to write modbus TCP and RTU master and slave. It can be used for testing purpose : It is shipped with slave simulator and a master with a web-based hmi (ok the hmi need to be improved :) ...
A library that allows your ESP8266 to communicate via Modbus protocol, acting as a slave (master in development). Supports IP via wireless network (Modbus IP). - vermut/arduino-ModbusIP_ESP8266 ...