Modbus RTU slave: auto baud rate detection

andresarmento / modbus-arduino

A library that allows your Arduino to communicate via Modbus protocol, acting as a slave (master in development). Supports serial (RS-232, RS-485) and IP via Ethernet (Modbus IP).

BSD 3-Clause "New" or "Revised" License

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Modbus RTU slave: auto baud rate detection #39

Open tuxmartin opened 5 years ago

tuxmartin commented 5 years ago

Hi,

is possible to use auto baud detection for Modbus RTU slave?

Something like this: https://gist.github.com/tuxmartin/46ca107057c650fbe6f63dcae5ee067d

My idea:

Modbus Master (Raspberry Pi) set serial port speed to X.
? (Modbus Master send broadcast message for synchronization every X seconds.) ?
Modbus Slave (Arduino) run detection of speed every X seconds.
Modbus Master periodically read data from all slaves - if any of slaves do not respond, slow down serial speed.

Thanks.