Modbus relays

[Battwell]

Cheap 4 relay modbus board play time.
Can’t find how to read the inputs
And won’t let me write multiple coils ( or read them multiple)
Anyone else got these working ??

The sales stuff says it works but can’t find any online evidence yet

https://youtu.be/MtIDaBlXuyw

[Battwell]

Ok
So these are crap!
Can only read or write one coil at a time. ( function 05 or 01)
The only other register I can read or write is the slave number .
Cannot read the inputs at all . ( advertised with inputs) but I have tried 4 different programs- all give a time out.
I have ordered another 16io type which will be tested shortly.

Yes this could be used to turn things on and off but cannot confirm via opto inputs any sensors required.