Flashing Tuya devices with ESPHome- CB3S

ESPHome
1

Hello together,

I’m about to flash my first tuya devices, because the local key topic really sucks to me.

We have about 19 devices right now, and I’m starting with the MiBoxer Wifi 5 in 1 LED Strip Controller.

https://www.amazon.de/Zigbee3-0-1-LED-Streifen-Controller-kompatibel-4-GHz-Fernbedienung-Sprachsteuerung/dp/B0BNJPKZVS/ref=sr_1_4?th=1

Right now, my Tuya cloud access is working again, so is there any possibility through the cloud API to check the built-in Wi-Fi MCU model?

Because of this article: MiBoxer WL5 LED Controller LED Controller (WL5) Configuration for Tasmota
I thought I have a WR3 chip, luckily I opened the device to find out, I actually have a CB3S chip.

Fortunately, this chip seams to be supported.
https://docs.libretiny.eu/boards/cb3s/

Now my first problem, is there any “easy” way to flash the chip via Tuya-Convert or so (without soldering)? I only found this blog (Flash Tuya CB3S Switches with OpenBeken | Coreforge).

If I have to solder, I would rather switch to a normal ESP32 chip.

Second problem, I’m still struggling with ESPHome config.
Though the cloud API, I found my important Tuya MCU DP:

20: switch_led
true = on
false = off

21: work_mode
color
white
scene
music

22: bright_value
0-1000

23: temp_value
0-1000

24: colour_data
HSV

104: switch_mode
single_color
dual_white
rgb
rgbw
rgbcct

105: pwm
low_frequency
high_frequency

How can I set up the switch select and transfer strings to the MCU?
I know, I have to use the provided library (Tuya MCU — ESPHome), but not how it should look like.

This is my current config:

uart:
  rx_pin: 10
  tx_pin: 11
  baud_rate: 9600

tuya:
  
switch:
  - platform: tuya
    name: "ON/OFF"
    switch_datapoint: 20

select:
  - platform: tuya
    name: "Work Mode"
    enum_datapoint: 21
    options:
      "color": "Color"
      "white": "White"
      "scene": "Scene"
      "music": "Music"

number:
  - platform: tuya
    name: "Brightness"
    number_datapoint: 22
    min_value: 0
    max_value: 1000
    step: 1

  - platform: tuya
    name: "Color Temperature"
    number_datapoint: 23
    min_value: 0
    max_value: 1000
    step: 1

light:
  - platform: tuya
    name: "RGBW Light"
    dimmer_datapoint: 22
    color_datapoint: 24
    color_type: hsv
    min_value: 0
    max_value: 1000
    default_transition_length: 0s

  - platform: tuya
    name: "Light Mode"
    enum_datapoint: 104
    options:
      "single_color": "Single Color"
      "dual_white": "Dual White"
      "rgb": "RGB"
      "rgbw": "RGBW"
      "rgbcct": "RGBCCT"

  - platform: tuya
    name: "PWM Frequency"
    enum_datapoint: 105
    options:
      "low_frequency": "Low Frequency"
      "high_frequency": "High Frequency"

Thank you for input and any best practice tips or recommendations :slight_smile:

2

Solved, I used the wrong pins and baudrate

3

Hi, you connect the tx/rx on cb3s chip to the esp device?
do you have data if the cb3s is disconnected from the network?

thanks.

4

Hi, the CB3S is the “ESP”.

Yes, there is always a communication between the CB3S and Tuya MCU which actually controls the LED. They are connected via the Rx/Tx pins. So remember to disable UART logging!

5

can you please post what the right pins / baud rate areb ?