Tuya Avatto Thermostat CB3S reading error

[saforever99]

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I just succesfully flashed a new Tuya Avatto Thermostat (chip CB3S) using ltchiptool v.4.12.2 with fw kickstart-bk7231n-2025-05-28.bin, after many unsuccessful attempts with tuya-cloudcutter.

When I analyze the firmware dump or Grab from ESPHome-Kickstart via ltchiptool, I have the following error: W: Block by ID 11 does not exist, returning empty. Therefore I cannot generate an ESPHome YAML file. Any suggestion on how to proceed ?

I can see and connect to the AP kickstart-bk7231n, but I guess I need a meaningful ESPHome YAML file to have the device working, don't I ? I have the original saved .bin file, but I don't know where I can share it here.

Thanks a lot for your help

[Cossid]

That means it has incompatible storage and likely doesn't have any data to generate a config. You will need to generate a config manually. Based on the image attached, it is likely a TuyaMCU device.

[saforever99]

Where do you think I can learn about the configuration of this device ? I found this yaml file for a Tuya thermostat, although the chip is different: https://github.com/vladyspavlov/esphome-avatto-wifi-thermostat/blob/main/thermostat.yaml. Do you think it can work ?

[Cossid]

There is a chance, as all TuyaMCU devices are controlled by DPIDs, and there is a chance the programming is the same. There isn't much for documentation beyond https://esphome.io/components/tuya/ (and by extension https://esphome.io/components/climate/tuya/) as each device is very different.

The first link shows how to view the DPIDs your device reports (but it may not actively announce all of them it supports).