[BK7231T][WB8P] LEDVANCE SmartPlus Classic Bulb Multicolor, E27

Name: [BK7231T][WB8P] LEDVANCE SmartPlus Classic Bulb Multicolor, E27
Uploaded: 2024-01-08T09:58:44+01:00
Description: This is a short teardown of the Ledvance SmartPlus Classic A100 14W Multicolor. The bulb uses a BK7231T (WB8P - new for me) Tuya chip. Installing OpenBK7231T: solder wires onto the 3v3, GND, TX1 and RX1; connect those to a UART and then follow the . You will need to hold a wire connecting CEN...

Question

This is a short teardown of the Ledvance SmartPlus Classic A100 14W Multicolor. The bulb uses a BK7231T (WB8P - new for me) Tuya chip. Installing OpenBK7231T: solder wires onto the 3v3, GND, TX1 and RX1; connect those to a UART and then follow the . You will need to hold a wire connecting CEN...

rchristescu · Accepted Answer

I think the device template should be updated in the Templates list.
Actual configuration is wrong, pin 26 is not used and Flag 24 shall be checked.
The right configuration is:

Log in, to see the code

I don't know how to request this update.

p.kaczmarek2 · Answer

That part:


color_temp: PWM 26
white: PWM 24

indicates that you have device using alternate CW control:


8	[LED] Alternate CW light mode (first PWM for warm/cold slider, second for brightness)

See: https://github.com/openshwprojects/OpenBK7231T_App/blob/main/docs/flags.md

Usually devices are using one PWM for Cool White, and second PWM for Warm White, but in your case, device has one PWM for White Temperature, and second for White Brightness.

You can see a sample of such device here:

lionboy · Answer

Still not working with this configuration, what I saw from GPIO Finder PWM 24 and PWM 26 have the same color Warm White, I don't find Cool White but on his box show me have this control

For RGB is ok because PWM1 is Red, PWM2 is Green and PWM3 is Blue, but I don't know from what channel to start I think from 1 is ok and PWM24 and 26 to be on 4 and 5 channel.

Thanks

p.kaczmarek2 · Answer


8	[LED] Alternate CW light mode (first PWM for warm/cold slider, second for brightness)

This expects channel 4 to be warm/cold (in your case P26) and channel 5 to be dimmer (in your case P24).

It looks like you're trying the opposite setting. Can you try swapping them?

lionboy · Answer

But is ok to start from channel 1 with RED or need to start from channel 0 RED the 1 Green and 3 Blue..... And you think i need to have on PWM_n or let with PWM normal? Thanks

p.kaczmarek2 · Answer

I think it will make no difference. We even have a self test that ensures that both numbering standards are supported.

lionboy · Answer

If i will change like this:

Brightness don't work anymore with Flag 8 active

Added after 3 [hours] 45 [minutes]:

Sorry but i migrate to ESP still don't understand how to control Warm/Cool RGBW bulb if anyone need this is code for ESPHome:


output:
  - platform: libretiny_pwm
    id: output_red
    pin: P7
  - platform: libretiny_pwm
    id: output_green
    pin: P8
  - platform: libretiny_pwm
    id: output_blue
    pin: P9
  - platform: libretiny_pwm
    id: output_warm_white
    pin: P26
  - platform: libretiny_pwm
    id: output_cold_white
    pin: P24
# here go the light definitions, effects and restore mode
light:
  - platform: rgbww
    name: "Living Lamp"
    id: 'lampa_living'
    color_interlock: true
    red: output_red
    green: output_green
    blue: output_blue
    warm_white: output_warm_white
    cold_white: output_cold_white
    warm_white_color_temperature: 2700 K
    cold_white_color_temperature: 6500 K

This is a RGBW not RGBWW but is work with this code from up only can't control Warm/Cool rest is everything great

Thanks

rchristescu · Answer

I also flashed this bulb with OBK and I have the same issue: Cold white is not working.
Configuration Pin 26 as PWM channel 3 is not OK because:
First - PWM5 on WB8P (Pin 26 of the IC) is not soldered on the main pcb.

Second - there are no cold white leds. Only red, green, blue and warm white.

The configuration should be:
Pin 7: PWM on channel 0
Pin 8: PWM on channel 1
Pin 9: PWM on channel 2
Pin 24: PWM on channel 4

But I am absolutely sure that with original firmware it has warm/cold white.
So, my assumption is that cold white is made by red + green + blue on the same time.

As I am pretty new to OKB, I don't know how to implement / test this assumption, any help is welcome.

divadiow · Answer

does indeed look like it's an RGBW bulb with only one shade of white LED. it would have to be making up some white with the RGBs.

divadiow · Answer

OBK should work 100% though I think. Is the main difference that OBK doesn't have transition effects?

rchristescu · Answer

I test the command:Code: text Expand Select all Copy to clipboardled_basecolor_rgb #FFFFFFand I get the cold white as with original firmware.So my assumption is right, cold white is made by mixing red, green and blue altogether.What I don't know is how to tell OBK that for channel 3 (cold white) pins 7, 8 and 9 should be used at the same time.In other words, how to substitute the missing cold white leds with all RGB leds.

divadiow · Answer

Ah. Maybe play with: Flag 24 - [LED] Emulate Cool White with RGB in device with four PWMS

rchristescu · Answer

Yes, checking Flag 24 solved the issue, thank you so much.Now the bulb works perfectly!

divadiow · Answer

awesome

p.kaczmarek2 · Answer

I am glad to see @divadiow solved the issue.
Regarding the template - @rchristescu so the post #2 is invalid? That's not alternative CW bulb but RGBW bulb with emulated channel?

Okay, let me see...
https://github.com/OpenBekenIOT/webapp/commit/a401742a7f63cc75bd97b300577589a7ee3ce09c
Change applied, is it correct now? Thank you

rchristescu · Answer

It is ok, thank you.

themaftei · Answer

I wanted to ask if it is possible to make this work with ESPHome, perhaps by emulating cool white? Also, is it possible to flash the firmware using Tuyacloudcutter instead of having to tear down and flash via UART? I came across a device called the Ledvance A60 (is in the device list of esp home) and was wondering if I could flash the firmware on an A100 over the air without bricking the bulb.

lionboy · Answer

This is what i use in ESPHOME Code: text Expand Select all Copy to clipboardesphome:   name: lampa-living   friendly_name: lampa-living bk72xx:   board: generic-bk7231t-qfn32-tuya # Enable logging logger: # Enable Home Assistant API api:   encryption:     key: put your api encryption ota:   - platform: esphome     password: put your password wifi:   ssid: !secret wifi_smart   password: !secret wifi_smart_pass   # Enable fallback hotspot in case wifi connection fails   ap:     ssid: Lampa-Living Fallback Hotspot     password: Hu6j0OHHwUTd      web_server: captive_portal: mdns: text_sensor:   - platform: wifi_info     ip_address:       name: 'Lampa Living IP'     ssid:       name: 'Lampa Living SSID'     dns_address:       name: 'Lampa Living DNS' sensor:   - platform: uptime     name: Uptime output:   - platform: libretiny_pwm     id: output_red     pin: P7   - platform: libretiny_pwm     id: output_green     pin: P8   - platform: libretiny_pwm     id: output_blue     pin: P9   - platform: libretiny_pwm     id: output_warm_white     pin: P24 #  - platform: libretiny_pwm #    id: output_cold_white #    pin: P24 # here go the light definitions, effects and restore mode light:   - platform: rgbw     name: Living Lamp     id: 'lampa_living'     color_interlock: true     red: output_red     green: output_green     blue: output_blue #    warm_white: output_warm_white     white: output_warm_white #    warm_white_color_temperature: 2700 K #    cold_white_color_temperature: 6500 K     effects:       # Use default parameters:       - random:       # Customize parameters       - random:           name: Slow Random Effect           transition_length: 30s           update_interval: 30s       - random:           name: Fast Random Effect           transition_length: 4s           update_interval: 5s       - pulse:       - pulse:           name: Fast Pulse           transition_length: 0.5s           update_interval: 0.5s           min_brightness: 0%           max_brightness: 100%       - pulse:           name: Slow Pulse           # transition_length: 1s      # defaults to 1s           update_interval: 2s       - pulse:           name: Asymmetrical Pulse           transition_length:             on_length: 1s             off_length: 500ms           update_interval: 1.5s       - strobe:       - strobe:           name: Strobe Effect           colors:             - state: true               brightness: 100%               red: 100%               green: 90%               blue: 0%               duration: 500ms             - state: false               duration: 250ms             - state: true               brightness: 100%               red: 0%               green: 100%               blue: 0%               duration: 500ms       - lambda:           name: My Custom Effect           update_interval: 1s           lambda: |-             static int state = 0;             auto call = id(lampa_living).turn_on();             // Transition of 1000ms = 1s             call.set_transition_length(1000);             if (state == 0) {               call.set_rgb(1.0, 1.0, 1.0);             } else if (state == 1) {               call.set_rgb(1.0, 0.0, 1.0);             } else if (state == 2) {               call.set_rgb(0.0, 0.0, 1.0);             } else {               call.set_rgb(1.0, 0.0, 0.0);             }             call.perform();             state += 1;             if (state == 4)               state = 0;       - lambda:           name: randomflicker           update_interval: 200 ms           lambda: |-             auto call = id(lampa_living).turn_on();             float r = random_float() * 2.0f - 1.0f;              r =  r * r * r;             call.set_transition_length(r);             //static double br=id(global_brightness);             call.set_brightness(0.7 + r/10);             call.set_publish(false);             call.set_save(false);             call.perform();       - lambda:           name: Chill Mode           update_interval: 70s           lambda: |-             auto call = id(lampa_living).turn_on();             call.set_transition_length(55000);             call.set_white(0.0);             esphome::Color c = esphome::Color::random_color();             call.set_rgb((c.red%255)/255.0, (c.green%255)/255.0, (c.blue%255)/255.0);             call.set_publish(false);             call.set_save(false);             call.perform();       - lambda:           name: Chill Mode (Vibrant)           update_interval: 120s           lambda: |-             auto call = id(lampa_living).turn_on();             call.set_transition_length(800);             call.set_white(0.0);             esphome::Color c = esphome::Color::random_color();             call.set_rgb((c.red%128)/255.0, (c.green%128)/255.0, (c.blue%128)/255.0);             call.set_publish(false);             call.set_save(false);             call.perform();       - lambda:           name: Disco           update_interval: 500ms           lambda: |-             auto call = id(lampa_living).turn_on();             //call.set_transition_length(rand() % 400 + 1);             call.set_transition_length(500);             call.set_white(0.0);             esphome::Color c = esphome::Color::random_color();             call.set_rgb((c.red)/255.0, (c.green)/255.0, (c.blue)/255.0);             call.set_publish(false);             call.set_save(false);             call.perform();       - lambda:           name: WTF           update_interval: 200ms           lambda: |-             auto call = id(lampa_living).turn_on();             call.set_transition_length(200);             call.set_white(0.0);             call.set_brightness((rand() % 255 + 1) / 255.0);             call.set_color_temperature(rand() % 2 == 0 ? 0: 512);             call.perform();       - strobe:           name: Lightning           colors:             - state: True               brightness: 100%               red: 90%               green: 90%               blue: 100%               white: 0%               duration: 50ms             - state: False               duration: 50ms             - state: True               brightness: 100%               red: 90%               green: 90%               blue: 100%               white: 0%               duration: 160ms             - state: False               duration: 50ms             - state: True               brightness: 100%               red: 90%               green: 90%               blue: 100%               white: 0%               duration: 50ms             - state: False               duration: 3000ms       - random:           name: Slow Random Colors           transition_length: 30s           update_interval: 30s       - random:           name: Fast Random Colors           transition_length: 4s           update_interval: 5s       - strobe:           name: In Alarm           colors:             - state: True               red: 100%               blue: 0%               green: 0%               white: 0%               duration: 150ms             - state: False               duration: 100ms             - state: True               red: 100%               blue: 0%               green: 0%               white: 0%                 duration: 150ms             - state: False               duration: 100ms             - state: True               red: 0%               blue: 100%               green: 0%               white: 0%               duration: 150ms             - state: False               duration: 100ms             - state: True               red: 0%               blue: 100%               green: 0%               white: 0%               duration: 150ms             - state: False               duration: 100ms

lightmaster001 · Answer

I managed to flash the Ledvance A60 9W Lamp via cloudcutter with a generic device profile for the right software-version (in my case (oem-bk7231n-light-ty-1.3.21-sdk-2.3.3-40.00) I used the configuration for the A100 first, but some Pins were different.

This is the Device configuration I extracted from Tuya:
- LED Green (Channel 2) on P24
- LED Cool (Channel 4) on P8
- LED Blue (Channel 3) on P6
- LED Warm (Channel 5) on P7
- PWM Frequency 1000
- LED Red (Channel 1) on P26
I converted this to
"6": "PWM;3",
"7": "PWM;5",
"8": "PWM;4",
"24": "PWM;2",
"26": "PWM;1"
and disabled flag 24

This made the lamp work perfectly fine.

[BK7231T][WB8P] LEDVANCE SmartPlus Classic Bulb Multicolor, E27

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