You do not need commercial Modbus gateways. Arduino (with an ethernet shield and a cheap MAX485 module) can do the job! Change settings of your Arduino-based Modbus RTU to Modbus TCP/UDP gateway via ...

The Modbus is a master-slave protocol used in industrial ... of SWITCH_ISTS register changes as the state of the selected digital input. The Arduino standard Ethernet shield is based on chip WIZnet ...

While there are a couple of open-source brushless drivers already available, [neuromancer2701] created his own brushless motor controller on an Arduino shield. [neuromancer2701]’s shield is a ...