Writing modbus registers

[amiko24]

Hello David, how can I write the registers.

I use such an automation to write the wallbox registers via Modbus. (See yaml code below).
Does it work the same way with the Deye Iverters?
What is the name of the hub for Deye sg04lp3? Slave number is 1 or 0?

`- id: '1680707528756'
alias: Setze Ladestrom
description: ''
trigger:

• platform: state
  entity_id:
  • sensor.output_strom_wallbox
    condition: []
    action:
• service: modbus.write_register
  data:
  hub: modbus heidelberg wallbox
  address: 261
  slave: 1
  value:
  • '{{ (states.sensor.output_strom_wallbox.state) }}'`

[PV-Joe]

I don’t know about the write registers but:

Slave number is 1

… for my Deye SG04LP3

It works fine!

[gedger]

When I look at the services provided by solarman I only see.

[gedger]

So this is a working call to change a holding register.

[amiko24]

it should also work via device

` - action: solarman.write_holding_register
metadata: {}
data:
wait_for_attempts: 5
device: 70ddcba05b16bf94857f18e9836eb017
register: 80
value: 1
mode: single``

[gedger]

It only works with device, the GUI translates the friendly device name to device id for you. if you look at the service call I showed above then the yaml is .

      - service: solarman.write_holding_register
        data:
          wait_for_attempts: 5
          device: db2d333f97371cec16797b695551cef5
          register: 3051
          value: 10000

[PaulOckenden]

When I try writing to 0x1200 (so 4608 decimal) after a few seconds I get an error saying "Failed to perform the action solarman.write_holding_register. The value contained in the request data field is not an allowable value for the server."

This is using sofar_wifikit.yaml with a Sofar ME3000SP.

I get the same error whether I use Mode 6 (single register) or Mode 16 (multiple).

I think the register should be valid.

[davidrapan]

Try to use method with function code 16. That message usually means wrong method used. 😉

Edit: Ah you mentioned you tried it...

Edit2: To confirm you have the right register try service for reading, read the value and check if it works and is correct.

[PaulOckenden]

Thanks for your help. It seems to read fine. Also contains the value I was expecting.

[davidrapan]

Now try to change the value to your desired one directly on the device and try to read it again.

[PaulOckenden]

I don't know how, but I just tried using 16 (multiple) and it worked this time. It definitely gave an error earlier.

Hmmm... (Unless I did a stupid typo - I don't think so, but I guess I might have transposed digits).

Again, thank you for your help.