I am having nodemcu unit. I have connected nodemcu unit to Modbus rtu device.
It uses 1 as device ID . operating @ various baudrate. I would like to send modbusRTU with read holding register request and convert & display on Blynk app…
Is there any library available . i found example code Here. But i dont know
- How device ID being selected.
- where all register value being stored.
- how to read value convert & store in buffer.