[modbus_controller:266]: Duplicate modbus command found: type=0x3 address=

[concierge-at]

Hello,

thank you for the great ESPHome Deye YAML configuration – I've been using it for a while now and it's working really well.

After the latest updates to ESPHome and Home Assistant, I also updated the ESP device connected to the inverter. Since then, I'm seeing warnings in the logs like this:

[W][modbus_controller:266]:`````` Duplicate modbus command found: type=0x3 address=243 count=3

The link to the Log

I'm not sure whether I can safely ignore these warnings or if I should fix them.
I tried to look for duplicate entries in my YAML, but I couldn't find any that use the same register with the same settings.

Below, I’ll post part of the log output and also my YAML configuration. I'm using an ESP32-C3 dev board with a MAX485 adapter. Sorry if the formatting isn’t perfect.

Can you tell me if this is something I should worry about? Or is there a way to fix it?

The code of the Yaml

Thanks in advance!

[slipx06]

Hi. Its not normal to see those errors. Check your wiring, make sure all connections are tight. Also make sure you are using a good power supply to drive the ESP and MAX485 adapter.

You can also try reduce your update interval in your config and see if that helps

[concierge-at]

thank you @slipx06
i have taken an new ESP, a new Max485 and an new 20W USB Power Suply and a new network cable from the inverter to the max Groundet one Side

I have done update interval
`
modbus_controller:

• id: inverter
  address: 0x01
  modbus_id: inverter_modbus
  setup_priority: -10
  update_interval: "20s"
  command_throttle: "2000ms"
  `
  i have ordert new esp32 S3 and new Rs485 ttl without flowcontrol to test it.
  It runs but only in the log these messages will be

i think you have an idea mey be there is an error in my copied code from 2 years ago

and testing is a difficult scene its always to travel 200 km to the inverter its not in my residence

[concierge-at]

Edit:
since the update of ESP home to 2025.9.1 and update the ESP 2 day ago i have set the logging Level to warn. since i have done this there ony wars one duplicate error. i have change nothing on the code onyl the

  - id: inverter
    address: 0x01
    modbus_id: inverter_modbus
    setup_priority: -10
    update_interval: "15s"
    command_throttle: "50ms"

a book with seven locks is this for me

but thank you for answer me