Sonoff Mini Relay

https://sonoff.tech/product/wifi-diy-smart-switches/sonoff-mini

GPIO Pinout

Pin	Function
GPIO00	BUTTON
GPIO01	TX
GPIO02	AVAILABE
GPIO03	RX
GPIO04	S2 (external switch input)
GPIO12	Relay and RED LED
GPIO13	BLUE LED
GPIO16	OTA jumper pin
GND	S1 (external switch input)

Basic Config

substitutions:
  device_name: sonoffmini_1
  device_ip: 192.168.x.x

esphome:
  name: ${device_name}
esp8266:
  board: esp8285

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
  manual_ip:
    static_ip: ${device_ip}
    gateway: 192.168.x.x
    subnet: 255.255.255.0
  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "ESPHOME"
    password: "12345678"

logger:
  
api:
  reboot_timeout: 15min
  encryption:
    key: !secret api_encryption_key

ota:
  password: !secret ota_password

# the web_server & sensor components can be removed without affecting core functionaility.

web_server:
  port: 80

sensor:
  - platform: wifi_signal
    name: ${device_name} Wifi Signal Strength
    update_interval: 60s
  - platform: uptime
    name: ${device_name} Uptime

#######################################
# Device specific Config Begins Below #
#######################################

binary_sensor:
  - platform: gpio
    pin: GPIO00
    id: reset
    internal: true
    filters:
      - invert:
      - delayed_off: 10ms
    on_press:
      - switch.toggle:
          id: relay_1

  - platform: gpio
    name: ${device_name}_status
    pin: GPIO04
    id: switch_1
    on_press:
      then:
        - switch.toggle:
            id: relay_1
    on_release:
      then:
        - switch.toggle:
            id: relay_1

switch:
  - platform: gpio
    name: ${device_name}_switch
    icon: "mdi:lightbulb_outline"
    pin: GPIO12
    id: relay_1
    restore_mode: restore_default_off

status_led:
  pin:
    number: GPIO13
    allow_other_uses: true
    inverted: true

output:
  - platform: esp8266_pwm
    id: blue_led
    pin:
      number: GPIO13
      allow_other_uses: true
    inverted: True

light:
  # the 4 lines below define the Blue LED light on Sonoff Mini, to expose in HomeAssistant remove line "internal: true"
  - platform: monochromatic
    name: ${device_name}_blueled
    output: blue_led
    internal: true # hides the Blue LED from HomeAssistant

Alternative Config for Lights

This config will cause the entities to appears as lights rather than switches in Home Assistant

substitutions:
  device_name: sonoffmini
  device_ip: 192.168.x.x

esphome:
  name: ${device_name}

esp8266:
  board: esp01_1m

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
  manual_ip:
    static_ip: ${device_ip}
    gateway: 192.168.0.1
    subnet: 255.255.255.0
  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "ESPHOME"
    password: "12345678"

logger:
  
api:
  reboot_timeout: 15min
  encryption:
    key: !secret api_encryption_key

ota:
  password: !secret ota_password

# the web_server & sensor components can be removed without affecting core functionaility.

web_server:
  port: 80

sensor:
  - platform: wifi_signal
    name: ${device_name} Wifi Signal Strength
    update_interval: 60s
  - platform: uptime
    name: ${device_name} Uptime
#######################################
# Device specific Config Begins Below #
#######################################

binary_sensor:
  # the 7 lines below define the reset button
  - platform: gpio
    pin: GPIO00
    id: reset
    internal: true  # hides reset switch from HomeAssistant
    filters:
      - invert:
      - delayed_off: 10ms
  # the 3 lines below toggle the main relay on press of reset button
    on_press:
      - light.toggle:
          id: light_id

  # the 13 lines below toggle the main relay on command
  - platform: gpio
    name: relay_toggle
    internal: true  # hides relay toggle from HomeAssistant
    pin: GPIO04
    id: gpio_light_id
    on_press:
      then:
        - light.toggle:
            id: light_id
    on_release:
      then:
        - light.toggle:
            id: light_id

  # the 2 lines below create a status entity in HomeAssistant.
  - platform: status
    name: ${device_name} Status

status_led:
  pin:
    number: GPIO13
    allow_other_uses: true
    inverted: true

output:
  # the 3 lines below control the main relay
  - platform: gpio
    pin: GPIO12
    id: main_light_relay  
  # the 3 lines below control the Blue LED
  - platform: esp8266_pwm
    id: blue_led
    pin:
      number: GPIO13
      allow_other_uses: true
    inverted: True

light:
  # the 4 lines below define the main relay as a light
  - platform: binary
    name: ${device_name}_light # you can enter a custom name to appear in HomeAsistant here.
    output: main_light_relay  
    id: light_id
  # the 4 lines below define the Blue LED light on Sonoff Mini, to expose in HomeAssistant remove line "internal: true"
  - platform: monochromatic
    name: ${device_name}_blueled
    output: blue_led
    internal: true # hides the Blue LED from Homeassistant