Modbus Question

[Osvaldas]

Hi there,

I'm having some trouble enabling "active cooling" on my Iglu heat pump using Modbus. I've spent several hours trying to send commands through Modbus, but haven't been successful.

I should send 1 to 7th bit in the register 4005.



Here's the configuration I've been using:

{
"bus_address": "41/1/3",
"name": "Active Cooling enable",
"bus_datatype": "int16",
"datatype": "int16",
"type": "register",
"writable": true,
"write_multiple": true,
"address": 4005
}
I've also attempted using a bitmask configuration:

{
"bus_address": "41/1/3",
"name": "Active Cooling enable",
"bus_datatype": "int16",
"datatype": "int16",
"type": "register",
"writable": true,
"write_multiple": true,
"write_bitmask": true,
"value_bitmask": 128,
"address": 4005
}
However, neither approach has worked. I'm able to successfully send data to other registers that don't require a bitmask.

Is there anything I might be missing in my configuration?