Teardown and Analysis of GY GX53 Alexa 8W 600LM RGBCW Dimmable Bulb [BK7231N/BP5768]

Question

Hello,
I just did a teardown of these bulbs that are sold on Amazon:

https://amzn.eu/d/fqGawlL

They pair with Smart Life and Tuya app (it seems to pair with BLE for setting up WIFI network and then operate via WIFI.
It has the annoying problem that after only three switch on/off it resets and loses settings.

Here are the teardown pictures:

Chipset is BK7231N - NU1296DE.

Any chance to load custom firmware?

Thank you
Chris

p.kaczmarek2 · Accepted Answer

I don't know if they already support this device. If they do, then you can OTA. If not, then you should dump 2MB firmware of one of these devices and send them so they can make support for your device. You can also send 2MB firmware dump here, and I can forward it to them.

p.kaczmarek2 · Answer

Hello, no problems here, here is CBLC5 pinout:

Symbol	I/O type	Function
ANT	O	Pad pin for the external antenna
GND	P	Ground pin
M4	I/O	Support hardware PWM and correspond to PA 24 on the internal IC
M5	I/O	Support hardware PWM and correspond to PA 26 on the internal IC
M0	I/O	Support hardware PWM and correspond to PA 6 on the internal IC
3V3	P	Power supply pin
R2	I/O	UART2_RX, LOG RX, which corresponds to P1 on the internal IC
T2	I/O	UART2_TX, LOG TX, which corresponds to P0 on the internal IC
R1	I/O	UART1_RX, user serial interface RX, which corresponds to P10 on the internal IC
T1	I/O	UART1_TX, user serial interface TX, which corresponds to P11 on the internal IC
CSN	I	If connected to the ground before powered on, enter the RF test mode. If not connected or connected to VCC before powered on, enter the firmware application mode.
None	I	RST pin, which corresponds to CEN on the internal IC

Procedure will be similar to the one here, but without desoldering the module:

BP5768 is also supported in obk.

I am creating multiplatform open source firmware (Tasmota replacement), right now supporting BK7231T, BK7231N, XR809, BL602, W800, W600, LN882H and soon supporting RTL and W701:
https://github.com/openshwprojects/OpenBK7231T
If you like my work, support me at: https://paypal.me/openshwprojects

Helpful post? Buy me a coffee.

chrispazz · Answer

So no luck to update firmware only OTA with Tuya cloud-cutter?I have 12 of them .....

chrispazz · Answer

Ok I will try with their android dump application. Do you know if with this kind of device (that seems not to have AP mode but BLE configuration) is possible to force AP mode? Thank you

p.kaczmarek2 · Answer

Please check device manual for that kind of information. You can also post a manual screenshot here. I do not have much experience related to flashing by OTA hack, because I always buy one piece of each device model and then proceed to flash it by wires while making a teardown article for our list here:
https://openbekeniot.github.io/webapp/devicesList.html

Teardown and Analysis of GY GX53 Alexa 8W 600LM RGBCW Dimmable Bulb [BK7231N/BP5768]

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