Tuya Generic S09 Temperature/Humidity/Clock/IR

General Notes

There are a few similar models of this device, some without the IR function, such as the TH06. Some have different date formats and 24 hour time. There's detailed teardown info at Elektroda.

GPIO Pinout

Pin	Function
P6	Button
P8	LED
P26	IR Transmitter

An IR receiver on pin 8 is mentioned in a few places, but it's definitely connected to the LED. I tried other pins, but nothing receives and I don't see any mention of that being a capability in any seller descriptions. You can ignore the tuya component warning about the status pin. The wifi status works over the Tuya protocol, so I assume the setting just points to the LED because that's the stock use for it.

Flashing

The S09 that I got has a CB3S module. Others have a WB3S, but they're very similar.

I used ltchiptool to backup the original firmware and flash an esphome uf2 binary to it.

Configuration

bk72xx:
  board: cb3s

uart:
  tx_pin: TX1
  rx_pin: RX1
  baud_rate: 9600

time:
  - platform: sntp
    id: sntptime

tuya:
  time_id: sntptime

sensor:
  - platform: tuya
    name: Temperature
    sensor_datapoint: 101
    unit_of_measurement: °C
    accuracy_decimals: 1
    device_class: temperature
    filters:
      multiply: 0.1
  - platform: tuya
    name: Humidity
    sensor_datapoint: 102
    unit_of_measurement: "%"
    device_class: humidity

output:
  - platform: libretiny_pwm
    id: led
    pin: 8

light:
  - platform: monochromatic
    name: LED
    output: led

binary_sensor:
  - platform: gpio
    id: btn
    pin:
      number: 6
      mode: input_pullup
      inverted: true

remote_transmitter:
  pin: 26
  carrier_duty_percent: 50%