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ESPHome devices

Teckin SS33: ESPHome

Teckin SS33 (smart plugs, ESP8266): GPIO pinout and a starter ESPHome config with relays, buttons, LED. Local Home Assistant control with no cloud.

Type
Smart plugs
Chip
ESP8266
Region standard
US

Pinout

PinFunction
GPIO4Status LED
GPIO13Push Button
GPIO12Relay 1
GPIO14Relay 2
GPIO3Relay 3

Find it in shops: AliExpress

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Starter ESPHome config

Built from the pinout above. Keys and the Wi-Fi password come from secrets.yaml in ESPHome. Check the pins against your hardware revision before flashing: one model can ship with different boards.

substitutions:
  name: teckin-ss33

esphome:
  name: ${name}
  friendly_name: "Teckin SS33"

esp8266:
  board: esp01_1m  # most plugs and relays have 1 MB flash; check yours

logger:
api:
  encryption:
    key: !secret api_key
ota:
  - platform: esphome
    password: !secret ota_password
wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
  ap: {}
captive_portal:

switch:
  - platform: gpio
    pin: GPIO12
    id: relay1
    name: "Relay 1"  # Relay 1
    restore_mode: RESTORE_DEFAULT_OFF
  - platform: gpio
    pin: GPIO14
    id: relay2
    name: "Relay 2"  # Relay 2
    restore_mode: RESTORE_DEFAULT_OFF
  - platform: gpio
    pin: GPIO3
    id: relay3
    name: "Relay 3"  # Relay 3
    restore_mode: RESTORE_DEFAULT_OFF

binary_sensor:
  - platform: gpio
    pin:
      number: GPIO13
      mode: INPUT_PULLUP
      inverted: true
    name: "Button"  # Push Button
    on_press:
      - switch.toggle: relay1

status_led:
  pin:
    number: GPIO4
    inverted: true  # Status LED

How to flash

  • Most devices are flashed over UART: a 3.3 V USB-TTL adapter to RX, TX, GND and 3V3, holding GPIO0 to ground at power-on (ESP8266/ESP32). Mains power disconnected.
  • Beken (BK72xx) and Realtek chips are flashed with ltchiptool, or with cloudcutter without opening the case if the firmware allows it.
  • Details and board photos: the device page in the ESPHome database.

A config from scratch: ESPHome generator. Which pins are safe: pinout.

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