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esphome-yeelight-ceiling-light

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Esphome custom firmware for some Yeelight Ceiling Lights.

Requirements

Supported devices

Name Model Model no. Specs
Yeelight Ceiling Light YLXD76YL yeelink.light.ceil26 YLXD76YL AC220V, 23W, 1500lm, 2700K-6500K, 32cm
Yeelight XianYu C2001C550 yeelink.light.ceil26 C2001C550 AC220V, 50W, 2700K-6500K, 55.5cm
Yeelight XianYu C2001C450 yeelink.light.ceil26 C2001C450 AC220V, 50W, 2700K-6500K, 45.5cm
Yeelight XianYu C2001S500 (untested!) yeelink.light.ceil26(?) C2001S500 AC220V, 50W, 2700K-6500K, 50.5x50.5cm
Yeelight 1S YLDD05Y Lightstrip yeelink.light.strip6 YLDD05Y AC220V, 50W, RGB
Yeelight Meteorite Ceiling Light yeelink.light.ceiling10 YLDL01YL AC220V, 33W, 2700K-6500K, 7W RGB ambient light, 90x7x4 cm
Yeelight Ceiling Light YLXD42YL yeelink.light.ceiling15 YLXD42YL AC220V, 32W, 2200lm, 2700K-6500K, 48cm
Yeelight Ceiling Light YLXD41YL yeelink.light.ceiling11 YLXD41YL AC220V, 28W, 1800lm, 2700K-6500K, 32cm
Yeelight Staria Bedside LED yeelink.light.lamp9 YLCT02YL AC220V, 20W, 350lm, 2700K-6500K, without charger
Yeelight Staria Pro Bedside LED yeelink.light.lampUNKNOWN YLCT03YL AC220V, 20W, 350lm, 2700K-6500K, Qi charger
Mi Smart LED Ceiling Light yeelink.light.ceiling22 MJXDD001 / MJXDD01SYL AC220V, 45W, 3100lm, 2700K-6000K, 45cm
Yeelight Ceiling Light YLXD50YL yeelink.light.ceiling20 YLXD50YL AC220V, 50W, 3100lm, 2700K-6500K, RGB ambient light, 47cm
Yeelight Arwen 450C yeelight.light.ceilc YLXD013-B AC220V, 50W, 4000lm, 2700K-6500K, RGB ambient light, 50cm
Yeelight Arwen 450S yeelight.light.ceilc YLXD013 AC220V, 50W, 3000lm, 2700K-6500K, RGB ambient light, 45cm
Yeelight Arwen 550C yeelight.light.ceilc YLXD013-C AC220V, 50W, 4500lm, 2700K-6500K, RGB ambient light, 60cm
Yeelight Arwen 550S yeelight.light.ceilb YLXD013-A AC220V, 50W, 3500lm, 2700K-6500K, RGB ambient light, 55cm
Yeelight Arwen A2001 450 yeelight.light.ceil29 YLXD032 AC220V, 50W, 4500lm, 2700K-6500K, 50cm
Yeelight Arwen A2001 550 yeelight.light.ceil29 YLXD031 AC220V, 50W, 4800lm, 2700K-6500K, 60cm
Yeelight Ceiling Light 235C yeelight.light.ceil20 YLXDD-0030 AC220V, 18W, 1200lm, 2700K-6500K, RGB ambient light
Yeelight Ceiling Light 300C yeelight.light.ceil20 YLXDD-0033 AC220V, 21W, 1600lm, 2700K-6500K, RGB ambient light
Yeelight Ceiling Light 400C yeelight.light.ceil20 YLXDD-0034 AC220V, 24W, 2000lm, 2700K-6500K, RGB ambient light

More esphome + yeelight projects

Features

yeelink.light.ceil26, yeelink.light.ceiling22

  • Light (CCWW)
    • Brightness
    • Color temperature (2700K-6500K)
  • Nightlight (2700K)
    • Brightness
  • Sensor
    • Power supply voltage (ESP32 VCC)

yeelink.light.ceiling10, yeelink.light.ceiling20, yeelight.light.ceilb, yeelight.light.ceilc

  • Light (CCWW)
    • Brightness
    • Color temperature (2700K-6500K)
  • Nightlight (2700K)
    • Brightness
  • Ambient light (RGB)
    • Brightness
    • Color
  • Sensor
    • ADC1
    • ADC2

yeelight.light.ceil29

  • Light (CCWW)
    • Brightness
    • Color temperature (2700K-6500K)
  • Nightlight (2700K)
    • Brightness
  • Sensor
    • ADC1
    • ADC2

yeelink.light.ceiling15, yeelink.light.ceiling11

  • Light (CCWW)
    • Brightness
    • Color temperature (2700K-6500K)
  • Nightlight (2700K)
    • Brightness
  • Sensor
    • ADC1
    • ADC2

yeelink.light.lamp9, yeelink.light.lampX

  • Power button
  • Light (CCWW)
    • Brightness
    • Color temperature (2700K-6500K)
  • Nightlight (2700K)
    • Brightness

yeelink.light.strip6

  • Light strip (RGB)
    • Brightness
    • Color

Known bugs

Bootloop when BLE Tracker configured. Luckily ESPHome goes into safe mode after 10 unsuccessful boot attempts by default. So the device can be flashed OTA nevertheless.

Bootlog
[11:59:23]ets Jun  8 2016 00:22:57
[11:59:23]
[11:59:23]rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
[11:59:23]configsip: 0, SPIWP:0xee
[11:59:23]clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
[11:59:23]mode:DIO, clock div:2
[11:59:23]load:0x3fff0018,len:4
[11:59:23]load:0x3fff001c,len:1044
[11:59:23]load:0x40078000,len:8896
[11:59:23]load:0x40080400,len:5828
[11:59:23]entry 0x400806ac
[11:59:23][I][logger:166]: Log initialized
[11:59:23][C][ota:366]: There have been 8 suspected unsuccessful boot attempts.
[11:59:23][I][app:029]: Running through setup()...
[11:59:23][C][power_supply:010]: Setting up Power Supply...
[11:59:23][C][light:097]: Setting up light 'unused_yeelight night light'...
[11:59:23][D][light:265]: 'unused_yeelight night light' Setting:
[11:59:23][D][light:278]:   Brightness: 100%
[11:59:23][C][light:097]: Setting up light 'unused_yeelight ceiling light'...
[11:59:23][D][light:265]: 'unused_yeelight ceiling light' Setting:
[11:59:23][D][light:278]:   Brightness: 100%
[11:59:23][D][light:282]:   Color Temperature: 1.0 mireds
[11:59:23][D][light:287]:   Red=100%, Green=100%, Blue=100%
[11:59:24][D][esp32_ble_tracker:148]: Starting scan...
[11:59:24][D][binary_sensor:034]: 'unused_yeelight Status': Sending initial state OFF
[11:59:24][C][adc:018]: Setting up ADC 'unused_yeelight power supply'...
[11:59:24][D][text_sensor:015]: 'unused_yeelight Esphome Version': Sending state '1.15.3 Feb 25 2021, 11:57:31'
[11:59:24][C][wifi:033]: Setting up WiFi...
[11:59:24][I][wifi:194]: WiFi Connecting to 'xxxxxxxx'...
[11:59:24][D][sensor:092]: 'unused_yeelight Uptime': Sending state 0.00001 days with 0 decimals of accuracy
[11:59:24][D][adc:056]: 'unused_yeelight power supply': Got voltage=3.90V
[11:59:24][D][sensor:092]: 'unused_yeelight power supply': Sending state 3.90000 V with 2 decimals of accuracy
[11:59:24][D][esp32_ble_tracker:544]: Found device 50:XX:XX:XX:XX:XX RSSI=-62
[11:59:24][D][esp32_ble_tracker:565]:   Address Type: PUBLIC
[11:59:24][D][esp32_ble_tracker:544]: Found device 49:XX:XX:XX:XX:XX RSSI=-91
[11:59:24][D][esp32_ble_tracker:565]:   Address Type: RANDOM
[11:59:29]E (6637) task_wdt: Task watchdog got triggered. The following tasks did not reset the watchdog in time:
[11:59:29]E (6637) task_wdt:  - IDLE0 (CPU 0)
[11:59:29]E (6637) task_wdt: Tasks currently running:
[11:59:29]E (6637) task_wdt: CPU 0: loopTask
[11:59:29]E (6637) task_wdt: Aborting.
[11:59:29]abort() was called at PC 0x400ea723 on core 0
[11:59:29]
[11:59:29]Backtrace: 0x40091698:0x3ffbe520 0x400918a9:0x3ffbe540 0x400ea723:0x3ffbe560 0x4008494e:0x3ffbe580 0x4000bfed:0x3ffcdb20 0x4008f135:0x3ffcdb30 0x4008e28f:0x3ffcdb50 0x400d8df1:0x3ffcdb90 0x401df9c9:0x3ffcdc30 0x401dfa95:0x3ffcdc50 0x400e0959:0x3ffcdc70 0x400e3632:0x3ffcdcc0 0x400e8973:0x3ffcdf50 0x4008e535:0x3ffcdf70
WARNING Found stack trace! Trying to decode it
WARNING Decoded 0x40091698: invoke_abort at /home/paul/src/esp32-arduino-lib-builder/esp-idf/components/esp32/panic.c:707
WARNING Decoded 0x400918a9: abort at /home/paul/src/esp32-arduino-lib-builder/esp-idf/components/esp32/panic.c:707
WARNING Decoded 0x400ea723: task_wdt_isr at /home/paul/src/esp32-arduino-lib-builder/esp-idf/components/esp32/task_wdt.c:252
WARNING Decoded 0x4008494e: _xt_lowint1 at /home/paul/src/esp32-arduino-lib-builder/esp-idf/components/freertos/xtensa_vectors.S:1154
WARNING Decoded 0x4008f135: vTaskExitCritical at /home/paul/src/esp32-arduino-lib-builder/esp-idf/components/freertos/tasks.c:3507
WARNING Decoded 0x4008e28f: xQueueGenericReceive at /home/paul/src/esp32-arduino-lib-builder/esp-idf/components/freertos/queue.c:2520
WARNING Decoded 0x400d8df1: esphome::esp32_ble_tracker::ESP32BLETracker::loop() at /home/sebastian/esphome/unused_yeelight/src/esphome/components/esp32_ble_tracker/esp32_ble_tracker.cpp:241
WARNING Decoded 0x401df9c9: esphome::Component::call_loop() at /home/sebastian/esphome/unused_yeelight/src/esphome/core/component.cpp:111
WARNING Decoded 0x401dfa95: esphome::Component::call() at /home/sebastian/esphome/unused_yeelight/src/esphome/core/component.cpp:111
WARNING Decoded 0x400e0959: esphome::Application::setup() at /home/sebastian/esphome/unused_yeelight/src/esphome/core/application.cpp:50 (discriminator 2)
WARNING Decoded 0x400e3632: setup() at /home/sebastian/esphome/unused_yeelight/src/main.cpp:360
WARNING Decoded 0x400e8973: loopTask(void*) at /home/sebastian/.platformio/packages/framework-arduinoespressif32@src-ff59aeb8b43c3669326fe991d70309ba/cores/esp32/main.cpp:14
WARNING Decoded 0x4008e535: vPortTaskWrapper at /home/paul/src/esp32-arduino-lib-builder/esp-idf/components/freertos/port.c:403
[11:59:29]
[11:59:29]Rebooting...

GPIOs

yeelink.light.ceil26

Name Label ESP32 GPIO Stock firmware limits
Warm white PWM W GPIO19 0.4V - 1.5V
Cold white PWM C GPIO21 0.5V - 3.0V
Night light PWM NL GPIO23
Power supply GPIO STB GPIO23
VCC measurement ADC1 GPIO35
TXD TP5 GPIO1
RXD TP4 GPIO3
GPIO0 TP3 GPIO0
GND TP2 PIN1
3V3 TP1 PIN2
# Pinout of the pin header at the bottom of the LED driver board

   CW -->o o<-- WW
  3V3 -->o o<-- NC
  GND -->o o<-- NC
  STB -->o o<-- NC
 ADC1 -->o o<-- NL

Please use 3V3 and GND of the pin header to power the daugther board / the ESP32 if you flash the ESP32 the first time. The ESP32 will enter the serial bootloader when GPIO0 (test point TP3) is held low (GND) on reset / power.

yeelink.light.ceiling10

Name Label ESP32 GPIO Stock firmware limits
Warm white PWM W GPIO19 0.42V - 2.55V
Cold white PWM C GPIO21 0.41V - 2.51V
Night light PWM NL GPIO23 N/A
Red PWM R GPIO33
Green PWM G GPIO26
Blue PWM B GPIO27
Power supply GPIO ON/OFF GPIO22 3.08V / 0V
TXD TX GPIO1
RXD RX GPIO3
GPIO0 IO0 GPIO0

The ESP32 will enter the serial bootloader when GPIO0 (test point IO0 at the back) is held low (GND) on reset / power.

yeelink.light.ceiling11

see Yeelight Ceiling Light YLXD41YL The ESP32 will enter the serial bootloader when GPIO0 (test point IO0 at the back) is held low (GND) on reset / power.

yeelink.light.ceiling15

Name Label ESP32 GPIO Stock firmware limits
Warm white PWM W GPIO19 0.67V - 3.08V
Cold white PWM C GPIO21 0.67V - 3.08V
Night light PWM NL GPIO23 0.06V - 3.0V
VCC measurement ADC1 GPIO36 2.0V
VCC measurement ADC2 GPIO32 1.76V
TXD GPIO1
RXD GPIO3
GPIO0 TP1 GPIO0

The ESP32 will enter the serial bootloader when GPIO0 (test point TP1 at the back) is held low (GND) on reset / power.

  ADC1 NL  WW GND           O  -- GND
   |   |   |   |            O  -- TXD
   8   6   4   2            O  -- RXD
   |   |   |   |           [O] -- 3V3
   o   o   o   o

   o   o   o   o
   |   |   |   |
   7   5   3   1
   |   |   |   |
  3V3 ADC2 CW GND

yeelink.light.ceiling22

Name Label ESP32 GPIO Stock firmware limits
Warm white PWM W GPIO19 14% - 50% duty cycle
Cold white PWM C GPIO21 20% - 88% duty cycle
Night light PWM NL GPIO23 10% - 100% duty cycle
VCC measurement ADC1 GPIO36
Power supply GPIO STA GPIO22 3.3V / 0V
3.3V TP1
GND TP2
GPIO0 TP3 GPIO0
TXD TP4 GPIO1
RXD TP5 GPIO3

The ESP32 will enter the serial bootloader when GPIO0 (test point TP3 at the back) is held low (GND) on reset / power.

yeelink.light.ceiling20

Name Label ESP32 GPIO Stock firmware limits
3.3V 3.3 3.3V
GND GND GND
Red PWM R GPIO33
Green PWM G GPIO26
Blue PWM B GPIO27
Night Light PWM NC GPIO23
Power supply GPIO STA GPIO22 3.3V / 0V
Cold white PWM C GPIO21 3.16V
Warm white PWM W GPIO19 1.58V
TXD TP5 GPIO1
RXD TP4 GPIO3
GPIO0 TP3 GPIO0

The ESP32 will enter the serial bootloader when GPIO0 (test point IO0 at the back) is held low (GND) on reset / power.

yeelink.light.lamp9, yeelink.light.lampUNKNOWN

Name Label ESP32 GPIO Stock firmware limits
Warm white PWM GPIO2 0.226V - 3.28V
Cold white PWM GPIO27 0.194V - 3.28V
Night light PWM GPIO12 0.197V - 3.27V
Power supply GPIO GPIO4
Button GPIO14
TXD TX, TP9 GPIO1
RXD RX, TP10 GPIO3
GPIO0 TP next to C37 GPIO0
SCL (I2C) GPIO18
SDA (I2C) GPIO17
LED (YLCT03YL only) GPIO33
3.3V +, TP7 3.3V
GND -, TP8 GND

Disassembly

YLXD76YL

YLXD41YL

C2001C550

Remove the single safety screw on the back and rotate the cover counterclockwise.

YLDL01YL

The grey plastic frame can easily be removed with a credit card between the outer white body and the grey frame. It is just clipped into place. Kudos to @fhloston.

References, sources & inspiration:

YLXD42YL

Rotate the cover counterclockwise.

YLCT02YL

Remove the 4 screws under the foot. The lower shell is held by 8 clips and can be separated with a plastic card and some force.

YLXD50YL

Remove the cover counterclockwise, disconnect from the AC (be safe!), pull out the RGB - C - W connectors (mark one of the last two). Unscrew the 2 screws from the base, and you can remove the controller box. Pick a flat screwdriver/plastic card and remove the plastic base from the box. Sometimes its harder, because the thermalpad. Pull out the PCB from the box, and you can remove the ESP module. Maybe some cleaning required from the glue. The test points are in the back of the ESP's PCB.

MJXDD01SYL

The disassembly process is almost, if not exactly the same, as with YLXD50YL. MJXDD01SYL seems a re-labled YLXD50YL.

Rotate the cover counterclockwise to remove the cover. Now you can see the outside of the board's housing. Unscrew the screws and unplug the two connectors. Now you can detach the housing from the base. On the back of the housing you need to remove the cover. Now you can take out the PCB from the housing. Unplug the ESP32 from the socket. Maybe you need to remove a bit of the glue between the PCM and the ESP32.

The Test Points (TP) are on the back side of the ESP32 module. The font is very small, maybe you need a magnifying glass.

To solder some wires to the TPs you need a bit of experience. Since other components are located very close to the TPs.

YLXDD-0033

To disasemble the unit, use a prying tool to un-clip the top part. There are no screws nor glue, only clips all around the ceiling light.

When flashing the YLXDD-00xx series you'll need an external 3.3V power supply and pull the enable (EN) pin to 3.3V.

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ESPHome custom firmware for some Yeelight Ceiling Lights

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