I'm getting my hands on an Arduino Uno and a WattNode Modbus later this week. I'm rather new to both, but think I can find my way through. I've tried doing some reading on the Arduino with modbus but am not having a ton of luck finding in depth writeups. I know there are modbus libraries available for the Arduino, but is that all I need? How about an RS485 shield? I'm assuming that is necessary to communicate with the Modbus wattnode?
Thanks in advance!