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Modbus is a simple protocol for serial communication between electronic devices.

1 vote
1 answer
768 views

Cannot read modbus data repetitively

I try to communicate with 2 RS485 sensors (pH and EC), but I have some troubles with my code. First, I tried to get data from just one: The function in charge of request sending: String GET_probe(St …
Teddol's user avatar
  • 85
4 votes
1 answer
26k views

Modbus RTU controller monitoring with arduino and RS485 module

I baught a pHmeter controller with RS485 output (MODBUS RTU protocol). I want to get pH value read by the controller over RS485 module and Arduino. …
Teddol's user avatar
  • 85