Sonoff BASIC R2 v1.4

v1.4 differs from the previous iterations of the Sonoff BASIC in that the two colour LED is blue and red (opposed to green and red).

This configuration is setup so that when the relay is manually activated via the button both the blue and red LED are lit (making the LED colour output purple). If the relay is activated via other means (such as Home Assistant) then it will simply be lit red.

The red side of the LED cannot be individually controlled without modification to the hardware, and serves as the indicator of when the relay is physically enabled.

As the only controllable LED is the Blue LED, it is configured here to use the status_led light component, which will take over the LED in the event of a error/warning state, such as when WiFi is disrupted.

GPIO Pinout

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

PCB

2023 Model

Basic Configuration

# Basic Config
esphome:
  name: sonoff_basic_r2

esp8266:
  board: esp8285

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

logger:
api:
ota:
  - platform: esphome

# Device Specific Config
binary_sensor:
  - platform: gpio
    id: push_button
    pin:
      number: GPIO0
      mode: INPUT_PULLUP
      inverted: True
    internal: true
    on_press:
      # Prevents unintended LED lit states.
      if:
        condition:
          - switch.is_off: relay
        then:
          - light.turn_on: blue_led
          - switch.turn_on: relay
        else:
          - switch.turn_off: relay

light:
  - platform: status_led
    id: blue_led
    internal: True
    pin:
      number: GPIO13
      inverted: True

switch:
  # The relay switches on the red side of the LED when active.
  - platform: gpio
    name: "Sonoff Basic Relay"
    pin: GPIO12
    id: relay
    on_turn_off:
      if:
        condition:
          - light.is_on: blue_led
        then:
          - light.turn_off: blue_led