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4felo posted a topic in ModbusFinally got multiple arduino slaves being monitored and controlled by Daqfactory. I've been working on this for the past 2 weeks and found no documentation available. I'm able to read analog inputs registers, write to and monitor PWMs registers, read & write to digital pin registers. Communication is through two wire modbus RTU. It's simply fascinating, i can literally monitor an control any of my inputs/outs in real time using cheap arduino unos. Stuff that is done by some really expensive PLCs out there. I'm still making some documentation, but if any of you need assistance post in the forum.