Umm, we don’t know. What board, cannot see it from here?
It would be a really good idea to share what you have done so far, especially as it works in part.
It would be an even better idea to share any documentation you have about the relay board, i.e. what is it expecting you to send to turn on relays?
My goal is to deviate solar panels from my ON GRID inverters to my charging string.
in brazil, they are not paying good for the net metered energy, soo i started a lithium power wall, conected to an EPEVER TRACER AN controller. i want to use NODE-RED LATER to process the inputs from the SDM630 WATTMETER, and them deviate panels from ongrid to charging string using this relay board.
I already started constructing the node-red flow i can compare the wattage passing thru SDM 630 on each phase and then make something. this make something is turning on and off some panels of the ON GRID string.
I’m new to the forum and a bit of a novice. I am trying to configure a 32-relay shield but without success. I do it all for Paper UI.
The problem I have is that I cannot create the poller without a communication error. The error is:
Error with read: org.openhab.core.io.transport.modbus.internal.ModbusSlaveIOExceptionImpl: Modbus IO Error with cause = ModbusIOException, EOF = false, message = ‘I / O failed to write’, cause2 = null
I have tried to change the type (coil, discrete, holding and input) but without result.