ESP32R4 Smart Home Controller

Sometimes it’s just not worth it making stuff yourselves, but it’s just better to ‘buy and modify’.

On Aliexpress we found this ESP32R4 Smart Home Controller from a company called RobotDyn that comes with Tasmota preinstalled. It’s got 4 relays (10 Amp), 4 buttons, 7 status LED’s (1 per relay, 1 DC power LED, 1 AC power LED and 1 ESP32 status LED), a 7-36v DC input and a 90-240v AC input. The ‘icing on the cake’ is a 433Mhz receiver/transmitter.

You can buy this for $12 to $15 with or without an enclosure, so this is really a no-brainer.

As we prefer to run esphome firmware, we reflashed the device with a basic OTA esphome config. You can simply do this but connecting a USB TTL(get the red one, CP2102 5PIN) and connect the 3.3v, GND, TX and RX. Please temporarily remove the jumper and DO NOT connect a power supply and USB power at the same time!

After that we started playing around with the GPIO’s 😉

This is the config we came up with. Everything works great and RAW 433Mhz data is showing up in the logs. Finally a device that just works without a fuzz!

substitutions:
  devicename: esp32-shc-01
  long_devicename: ESP32 Smart Home Controller

esphome:
  name: $devicename
  comment: $long_devicename
  platform: ESP32
  board: esp32doit-devkit-v1
  
wifi:
  ssid: !secret esphome_wifi_ssid
  password: !secret esphome_wifi_password
  ap:
    ssid: "$devicename Fallback Hotspot"
    password: !secret esphome_ap_password
    ap_timeout: 15s

captive_portal:

web_server:
  port: 80

logger:
  level: DEBUG

api:
  password: !secret esphome_api_password

ota:
  password: !secret esphome_ota_password

sensor:
  - platform: wifi_signal
    name: "$devicename WiFi Signal"
    update_interval: 60s
    
remote_receiver:
  pin: GPIO27
  dump: rc_switch
  # Settings to optimize recognition of RF devices
  tolerance: 50%
  filter: 250us
  idle: 4ms
  buffer_size: 2kb
    
switch:
  - platform: gpio
    name: "$long_devicename Relay 1"
    pin: GPIO25
    id: relay1
  - platform: gpio
    name: "$long_devicename Relay 2"
    pin: GPIO26
    id: relay2
  - platform: gpio
    name: "$long_devicename Relay 3"
    pin: GPIO33
    id: relay3
  - platform: gpio
    name: "$long_devicename Relay 4"
    pin: GPIO32
    id: relay4
    
binary_sensor:
  - platform: gpio
    pin: 
      number: GPIO34
      mode: INPUT_PULLUP
      inverted: True
    name: "$long_devicename Button 1"
    on_press:
      then:
        - switch.toggle: relay1
  - platform: gpio
    pin: 
      number: GPIO35
      mode: INPUT_PULLUP
      inverted: True
    name: "$long_devicename Button 2"
    on_press:
      then:
        - switch.toggle: relay2
  - platform: gpio
    pin: 
      number: GPIO36
      mode: INPUT_PULLUP
      inverted: True
    name: "$long_devicename Button 3"
    on_press:
      then:
        - switch.toggle: relay3
  - platform: gpio
    pin: 
      number: GPIO39
      mode: INPUT_PULLUP
      inverted: True
    name: "$long_devicename Button 4"
    on_press:
      then:
        - switch.toggle: relay4

Please be so kind to let us know if this helped you in any way, below in the comments!