Sonoff S31-lite

Initial Install

This device cannot be converted to ESPHome using tuya-convert.

You must remove the cover and use the serial header for first upload. Hold down the button while powering on the device to put it into bootloader mode.

GPIO Pinout

Pin	Function
GPIO0	Push Button (HIGH = off, LOW = on)
GPIO12	Relay and its status LED
GPIO13	Green LED (HIGH = off, LOW = on)
GPIO1	RX pin (for external sensors)
GPIO3	TX pin (for external sensors)

Basic Configuration

esphome:
  name: SonoffS31lite
  friendly_name: SONOFF S31 Lite

esp8266:
  board: esp01_1m
  framework:
    version: recommended

# Enable Home Assistant API
api:
  encryption:
    key: ""

ota:
  password: ""

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

logger:
  baud_rate: 0 # (UART logging interferes with cse7766)

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Sonoff S31-lite  Fallback Hotspot"
    password: ""

captive_portal:

uart:
  rx_pin: RX
  baud_rate: 4800

binary_sensor:
  - platform: gpio
    pin:
      number: GPIO0
      mode: INPUT_PULLUP
      inverted: True
    name: "Sonoff S31-lite Button"
    on_press:
      - switch.toggle: relay
  - platform: status
    name: "Sonoff S31-lite Status"

sensor:
  - platform: wifi_signal
    name: "Sonoff S31-lite WiFi Signal"
    update_interval: 60s

switch:
  - platform: gpio
    name: "Sonoff S31-lite Relay"
    pin: GPIO12
    id: relay
    restore_mode: ALWAYS_ON

time:
  - platform: sntp
    id: my_time

status_led:
  pin:
    number: GPIO13
    inverted: True