Xiaomi Mi Smart LED Desk Lamp Pro

Install ESPHome on Xiaomi Mi Smart LED Desk Lamp Pro

Materials

To install ESPHome onto your Lamp you need

• Soldering iron
• Serial to USB stick
• 3 Volt Power from extern or the Serial-USB

Open the Device

Unplug your Lamp and remove the screw under the rubber feet. Marked in the picture.

Solder your debugger onto the Board

Plugin the 3Volts last.

(Optional) backup old Firmware

If you want to backup the old firmware just use esptool.

Just replace COM or ttyUSB.

Linux

python3 -m esptool -b 115200 --port /dev/ttyUSB0 read_flash 0x00000 0x400000 your/folder/firmwaredump.bin

Windows

python.exe -m esptool -b 115200 --port COM3 read_flash 0x00000 0x400000 your/folder/firmwaredump.bin

Recommended Config

substitutions:
  friendly_name: Mi Desk Lamp Pro
  device_name: mi-desklamp-pro

# Basic Config
esphome:
  name: ${device_name}
  friendly_name: ${devicename_friendly}
  comment: ${friendly_name}

esp32:
  board: esp32doit-devkit-v1
  framework:
    type: esp-idf
    sdkconfig_options:
      CONFIG_FREERTOS_UNICORE: y
    advanced:
      ignore_efuse_mac_crc: true
      # See https://github.com/esphome/issues/issues/6333
      ignore_efuse_custom_mac: true

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
  fast_connect: on
  ap:
    ssid: ${device_name}
    password: !secret ap_password
    ap_timeout: 1min

# Enable logging
logger:

# Enable captive portal (fallback AP)
captive_portal:

# Enable Home Assistant API
api:
  reboot_timeout: 0s
  encryption:
    key: !secret encryption_key

# Enable over-the-air updates
ota:
  - platform: esphome
    password: !secret ota_password

# Enable Web server
web_server:
  port: 80

# Sync time with Home Assistant
time:
  - platform: homeassistant
    id: homeassistant_time

# Text sensors with general information
text_sensor:
  - platform: version
    name: "Version"
    icon: mdi:cube-outline

  - platform: wifi_info
    ip_address:
      name: "IP Address"
      icon: mdi:lan

sensor:
  # Uptime sensor
  - platform: uptime
    name: "Uptime"
    update_interval: 60s
    icon: mdi:clock-outline

  # WiFi Signal sensor
  - platform: wifi_signal
    name: "WiFi Signal"
    update_interval: 60s
    icon: mdi:wifi

  # Knob
  - platform: rotary_encoder
    id: rotation
    pin_a: GPIO26
    pin_b: GPIO27
    resolution: 2
    on_value:
      then:
        - if:
            condition:
              # Check if Button is pressed while rotating
              lambda: "return id(button).state;"
            then:
              # If Button is pressed, change CW/WW
              - lambda: |-
                  auto min_temp = id(light1).get_traits().get_min_mireds();
                  auto max_temp = id(light1).get_traits().get_max_mireds();
                  auto cur_temp = id(light1).current_values.get_color_temperature();
                  auto new_temp = max(min_temp, min(max_temp, cur_temp + (x*10)));
                  auto call = id(light1).turn_on();
                  call.set_color_temperature(new_temp);
                  call.perform();
            else:
              # If Button is not pressed, change brightness
              - light.dim_relative:
                  id: light1
                  relative_brightness: !lambda |-
                    return x / 25.0;
        # Reset Rotation to 0
        - sensor.rotary_encoder.set_value:
            id: rotation
            value: 0

binary_sensor:
  # Knob push-button
  - platform: gpio
    id: button
    pin:
      number: GPIO33
      inverted: True
      mode: INPUT_PULLDOWN
    on_click:
      then:
        - light.toggle:
            id: light1
            transition_length: 0.2s
    filters:
      - delayed_off: 5ms

number:
  - id: freq1
    name: "Flicker Frequency"
    icon: "mdi:sine-wave"
    unit_of_measurement: "Hz"
    platform: template
    min_value: 0
    max_value: 100000
    initial_value: 100000
    mode: box
    step: 1
    set_action:
      - output.ledc.set_frequency:
          id: output_cw
          frequency: !lambda return x;
      - output.ledc.set_frequency:
          id: output_ww
          frequency: !lambda return x;

output:
  - platform: ledc
    pin: GPIO2
    id: output_cw
    power_supply: power
    frequency: 100000Hz

  - platform: ledc
    pin: GPIO4
    id: output_ww
    power_supply: power
    frequency: 100000Hz

power_supply:
  - id: power
    pin: GPIO12
    enable_time: 0s
    keep_on_time: 0s

light:
  - platform: cwww
    id: light1
    name: "Light"
    default_transition_length: 0s
    constant_brightness: true
    cold_white: output_cw
    warm_white: output_ww
    cold_white_color_temperature: 4800 K
    # 2500k is the original value of the lamp. To correct binning for 2700k to look more like 2700k use 2650k instead
    warm_white_color_temperature: 2500 K
    restore_mode: RESTORE_DEFAULT_OFF
    gamma_correct: 1