RM3-mini-ESP8266-12F

Replace the original uC PCB from the BroadLink RM3 mini with a ESP8266-12F

BOM

Part	Name	Amount
R1-R2	0603 5.1kΩ	2x
R3-R6	0603 10kΩ	4x
R7	0603	1x
C1-C2	0603 100nF	2x
C3-C4	D5mm P2.5mm radial 47µF	2x
C5	0603 10µF	1x
D4	0603 LED	1x
J1	TYPE-C-31-M-12	1x
J3-J4	2.54mm pin header	9x
U1	ESP8266-12F	1x
U2	AMS1117 3.3V	1x
RST & FLASH	6mm Push button	2x

PCB

Front

Back

Example ESPHome configuration

This example receives all IR codes and prins them to the log. It also has the commands configured for the AUDIOPHONICS PRE-03.

esphome:
  name: "em3-mini"
  platform: esp8266
  board: esp01_1m

# Enable logging
logger:

# Enable Home Assistant API
api:

ota:


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

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Esphome-Web-09F729"
    password: "QghgvaHWUIw2"

captive_portal:

light:
  - platform: status_led
    id: status
    name: "Status LED"
    pin: GPIO2
    
remote_receiver:
  pin:
    number: GPIO14
    inverted: true
  dump: all

remote_transmitter:
  pin: GPIO13
  carrier_duty_percent: 50%

button:
  - platform: template
    name: "Volume Up"
    on_press:
      - remote_transmitter.transmit_nec:
          address: 0xFF00
          command: 0xEF10
  - platform: template
    name: "Volume Down"
    on_press:
      - remote_transmitter.transmit_nec:
          address: 0xFF00
          command: 0xEB14
  - platform: template
    name: "Mute"
    on_press:
      - remote_transmitter.transmit_nec:
          address: 0xFF00
          command: 0xED12
  - platform: template
    name: "Switch input left"
    on_press:
      - remote_transmitter.transmit_nec:
          address: 0xFF00
          command: 0xEE11
  - platform: template
    name: "Switch input right"
    on_press:
      - remote_transmitter.transmit_nec:
          address: 0xFF00
          command: 0xEC13