[BK7231N - CB2L] Aubess WiFi Smart LED Light Bulb 15W E27 RGBCW
This is a short teardown of the Aubess WiFi Smart LED Light Bulb 15W E27 RGBCW based on - BK7231N (CB2L).
Basic information:
Brand: Aubess
Chip: CB2L (BK7231N) - the chip listed is QM-02L, but seems to be another variant of CB2L
Local Vendor: https://www.aliexpress.com/item/1005004846008613.html
Teardown Photos:
Flashing method:
a) Using tuya-cloudcutter
1. Select profile with firmware version 1.3.21
b) Serial:
1. You'll need to desolder the CB2L chip because the TX & RX pin are not accessible from the back
2. Using serial method with hid_download tool. Start flashing and do a power cycle or ground the CEN pin.
UART TX --> PCB RX
UART RX --> PCB RX
UART GND --> PCB GND
UART 3.3V --> PCB 3.3V
Pinout:
Basic information:
Brand: Aubess
Chip: CB2L (BK7231N) - the chip listed is QM-02L, but seems to be another variant of CB2L
Local Vendor: https://www.aliexpress.com/item/1005004846008613.html
Teardown Photos:
Flashing method:
a) Using tuya-cloudcutter
1. Select profile with firmware version 1.3.21
b) Serial:
1. You'll need to desolder the CB2L chip because the TX & RX pin are not accessible from the back
2. Using serial method with hid_download tool. Start flashing and do a power cycle or ground the CEN pin.
UART TX --> PCB RX
UART RX --> PCB RX
UART GND --> PCB GND
UART 3.3V --> PCB 3.3V
Pinout:
| Pin | Assignment | P8 | PWM 1 | P7 | PWM 2 | P6 | PWM 3 | P24 | PWM 5 | P26 | PWM 4 |
Comments
Thank you for the review. I ordered this bulb https://www.aliexpress.com/item/1005004816481840.html?spm=a2g0o.order_list.order_list_main.22.51fc1802pM0UN1 and it's identical to yours. Flashed it using... [Read more]
Hello. I have flashed via USB and it works, but I have a problem. The light bulb is integrated into Home Assistant and from here I can control it and it updates the values fine on the web,... [Read more]
@spin55 Did you have the QM-02L module ? I removed the module from the board but Tx and Rx were not marked [Read more]
They are marked as: P10 --> RXD1 P11 --> TXD1 P0 --> TXD2 P1 --> RXD2 This module is the same as the CB2L, only the nomenclature of the pads changes. I say this from memory because I have already... [Read more]
Hello, I'm trying to get an RGBCW bulb to turn on when the toggle switch is flipped. For this I have put the following code in autoexec.bat: backlog led_basecolor_rgb FFFFFF; led_enableAll 1; led_dimmer... [Read more]
@spin55 do you have flag 12 enabled? Are you turning off the relay from the switch or using detached mode to keep the bulb always online? [Read more]
The bulb only connects to the mains when I flip the switch, that's why I have put the code in the starter. I did not have Flag12 activated because I considered that I did not need it, however I did the... [Read more]
@spin55 I’m using slightly different command on startup for the cold white and flag 12 disabled backlog led_temperature 154; led_enableAll 1; led_dimmer 100 [Read more]
@ferbulous, thanks, I've tried it and same effect. It turns on fine but then shuts itself off. Does that backlog command run from autoexec at startup when you plug in the bulb? I clarify that once the... [Read more]
@spin55 i’ll update tomorrow once i’m home. Maybe there’s some automation running that keeps toggling it off? [Read more]
@spin55 This is the logs after it's turned on Info:GEN:sta:rssi=-60,ssid=Suliana,bssid=a0:ab:1b:84:8c:d0 ,channel=10,cipher_type:CCMP Info:MAIN:Main_Init_Before_Delay Info:CFG:#######... [Read more]
@ferbulous, thanks for the log. I have solved it by activating Flag12 Regards [Read more]
Does OpenBK Support Philips Hue Emulation like Tasmota does? Can these be integrated with Alexa? [Read more]
Same product from following link worked with cloudcutter as described in OP. Link https://obrazki.elektroda.pl/8673223900_1683859565_thumb.jpg [Read more]
Pins and cloudcutter work with this AliExpress Choice Day B22 bulb https://obrazki.elektroda.pl/1875273400_1687468090_thumb.jpg https://obrazki.elektroda.pl/3376322400_1687468105_thumb.jpg [Read more]
After using this for a few months now, i noticed like 4-5 bulbs stop working. And it’s always the same cause which is this blown 16/10v 220uF capacitor. https://obrazki.elektroda.pl/9436941100_1697090349_thumb.jpg... [Read more]
I grabbed a couple of these from Ali. Went for the B22 bayonet fitting. https://obrazki.elektroda.pl/3057930900_1709281016_thumb.jpg I need module de-soldering practice so went for that option... [Read more]
Mine arrived today, it has CB2L, instead of QM-02L. It also had 1.5.21 firmware, so unable to flash via cloudcutter, only UART. https://obrazki.elektroda.pl/3356233500_1709299283_thumb.jpg [Read more]
@ferbulous I expect a number of my devices are ticking time bombs for failing capacitors. I should stock up on decent replacements. Did you go for particular brand? [Read more]