[BK7231N /CBLC5 ] Calex Smart Globe G125: LED Lamp, Tunable White, Dimmable, WiFi E27

ewenbr 1866 1

TL;DR

Calex Smart Globe G125 tunable white/dimmable WiFi E27 bulb uses a CBLC5 module with a BK7231N chipset.
PIN24 drives warm white PWM and PIN26 drives cold white PWM, while OpenBeken flags 398337 add MQTT broadcasts, state restore, auto-on, and smooth transitions.
Tuya Product ID keypkcmvhp7kexqj and Tuya Firmware Version V1.3.21 help confirm the BK7231N-based CBLC5 before flashing with tuya-cloudcutter.
The teardown found the bulb section completely sealed, with all electronics inside the socket, and the unit could be reassembled and glued back together, though it is not recommended.

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BK7231N CBLC5 pinout and OpenBeken flags for Calex bulb
Post #1 20605675 04 Jun 2023 17:52

Calex Smart Globe G125 led lamp from Hornbach / Amazon NL
Description: Tunable White / Dimmable Wifi E27 G125 lightbulb
Module: CBLC5
Chipset: BK7231N

Config:
PIN24: PWM, Channel 1 (Warm white)
PIN26: PWM, Channel 0 (Cold white)

Flags: 398337
- Flag 0 - [MQTT] Broadcast led params together (send dimmer and color when dimmer or color changes, topic name: YourDevName/led_basecolor_rgb/get, YourDevName/led_dimmer/get)
- Flag 10 - [MQTT] Broadcast self state on MQTT connect
- Flag 12 - [LED] Remember LED driver state (RGBCW, enable, brightness, temperature) after reboot
- Flag 17 - [LED] Automatically enable Light when changing brightness, color or temperature on WWW panel
- Flag 18 - [LED] Smooth transitions for LED (EXPERIMENTAL)

Tuya Product ID: (can be used to non-destructively confirm presence of the BK7231N based CBLC5)
keypkcmvhp7kexqj
Tuya Firmware Version: V1.3.21

Flashing OpenBeken

Used tuya-cloudcutter to flash with the following settings

Teardown

Wrapped a folded paper towel around the socket and applied a light force all around, twisting it to crack the adhesive. Shortly after, I was able to non destructively open it. The bulb part is completely sealed and all the electronics are located inside the socket

After a lot of prying, I was able to get the board out and have a look at the CBLC5 module

I was actually able to reassemble it and glue everything back together, but I would not recommended trying

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#2 20605734 04 Jun 2023 18:56

p.kaczmarek2 p.kaczmarek2

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Post #2
20605734 04 Jun 2023 18:56

CBLC5 is very tiny, but it is still impressive that they managed to fit it inside the thread.

How does the light from this bulb looks in reality?

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

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[BK7231N /CBLC5 ] Calex Smart Globe G125: LED Lamp, Tunable White, Dimmable, WiFi E27

FAQ

TL;DR: This FAQ gives 2 PWM pins and the expert warning "I would not recommended trying" for flashing a Calex Smart Globe G125 E27 with OpenBeken, BK7231N and CBLC5. It helps smart-home modders identify the module, configure tunable white, and avoid destructive teardown. [#20605675] Why it matters: The thread gives a working, device-specific OpenBeken setup for a Calex G125 bulb sold via Hornbach and Amazon NL.

Method	Specific value from thread	Destructive risk	Best use
tuya-cloudcutter	Used to flash OpenBeken	No teardown stated for flashing	Preferred path shown in the thread
Physical teardown	Socket opened, board removed	High; reassembly not recommended	Visual confirmation of CBLC5 only

Key insight: The Calex Smart Globe G125 uses a BK7231N-based CBLC5 module with warm white on PIN24 and cold white on PIN26. Non-destructive identification can use Tuya Product ID keypkcmvhp7kexqj.

Quick Facts

Device: Calex Smart Globe G125 LED lamp, tunable white, dimmable WiFi, E27 base, sold through Hornbach and Amazon NL. [#20605675]
Module and chipset: CBLC5 module with BK7231N chipset, located inside the socket rather than the sealed bulb globe. [#20605675]
OpenBeken PWM mapping: PIN24 = Channel 1 warm white; PIN26 = Channel 0 cold white. [#20605675]
Tuya identifiers: Product ID keypkcmvhp7kexqj; firmware version V1.3.21. [#20605675]
OpenBeken flags value: 398337, including MQTT state broadcast, LED state memory, auto-enable on changes, and smooth transitions. [#20605675]

How do I flash OpenBeken on a Calex Smart Globe G125 E27 bulb with a BK7231N CBLC5 module using tuya-cloudcutter?

Use tuya-cloudcutter with the Calex Smart Globe G125 BK7231N CBLC5 profile shown in the thread.

Confirm the bulb is the tunable white, dimmable WiFi E27 G125 model.
Match Tuya Product ID keypkcmvhp7kexqj and firmware V1.3.21.
Flash OpenBeken, then set PIN24 and PIN26 as PWM channels.

The thread reports successful OpenBeken flashing using tuya-cloudcutter on 2023-06-04. [#20605675]

What is the CBLC5 module used in the Calex Smart Globe G125 smart bulb?

The CBLC5 is the WiFi control module inside this Calex Smart Globe G125 bulb. "CBLC5 is a tiny embedded WiFi module that hosts the BK7231N chipset, drives the lamp electronics, and fits inside the E27 socket housing rather than the sealed globe." The thread identifies CBLC5 visually during teardown and notes it is very tiny. [#20605675]

What is BK7231N and why is it important for OpenBeken flashing?

BK7231N is the chipset used by the CBLC5 module in this Calex bulb. It matters because the successful OpenBeken conversion targets this BK7231N-based CBLC5 hardware. The thread lists the chipset as BK7231N, the module as CBLC5, and the Tuya firmware as V1.3.21. Those identifiers prevent choosing the wrong flashing target. [#20605675]

Which OpenBeken pin configuration should I use for the Calex Smart Globe G125 tunable white bulb?

Use PIN24 as PWM Channel 1 and PIN26 as PWM Channel 0. PIN24 controls warm white, while PIN26 controls cold white. This configuration matches the tunable white Calex Smart Globe G125 with CBLC5 and BK7231N. The thread gives only these 2 LED control pins, so do not add RGB channels from another bulb template. [#20605675]

What do PIN24 and PIN26 control on the Calex Smart Globe G125 with CBLC5?

PIN24 controls warm white, and PIN26 controls cold white. Both pins use PWM in OpenBeken. The exact mapping is PIN24 = PWM Channel 1 for warm white, and PIN26 = PWM Channel 0 for cold white. This gives tunable white control on the dimmable WiFi E27 G125 lamp. [#20605675]

What do the OpenBeken LED and MQTT flags like 398337 mean for this Calex smart bulb?

Flag value 398337 enables 5 listed OpenBeken behaviours for this bulb. Flag 0 broadcasts LED parameters together over MQTT. Flag 10 broadcasts self state on MQTT connect. Flag 12 remembers LED driver state after reboot. Flag 17 enables light when brightness, color, or temperature changes. Flag 18 enables experimental smooth LED transitions. [#20605675]

How can I confirm non-destructively that a Calex Smart Globe G125 contains a BK7231N-based CBLC5 module?

Check for Tuya Product ID keypkcmvhp7kexqj before opening the bulb. The thread states this ID can non-destructively confirm the presence of the BK7231N-based CBLC5 module. Pair it with firmware version V1.3.21 for the reported unit. This avoids cracking the socket adhesive just for identification. [#20605675]

What is the Tuya Product ID keypkcmvhp7kexqj for the Calex Smart Globe G125?

keypkcmvhp7kexqj is the Tuya Product ID reported for this Calex Smart Globe G125. The thread says it can confirm, without destructive opening, that the bulb uses a BK7231N-based CBLC5 module. The same post lists Tuya firmware version V1.3.21 for the tested unit. [#20605675]

How do I safely open the Calex Smart Globe G125 bulb without destroying the socket housing?

Wrap a folded paper towel around the socket, then apply light force while twisting. The thread describes this method as cracking the adhesive without destroying the housing. After that, the socket opened non-destructively. This is still a teardown of a mains E27 bulb, so keep the bulb disconnected before any mechanical work. [#20605675]

What should I expect when tearing down a Calex Smart Globe G125 smart bulb?

Expect the globe section to stay sealed and the electronics to sit inside the E27 socket. The board requires significant prying before you can view the CBLC5 module. The thread shows the socket opened, the board removed, and the module inspected. It also warns that reassembly is possible but not recommended. [#20605675]

Why is the Calex Smart Globe G125 difficult to disassemble and reassemble after opening?

The bulb is difficult because adhesive holds the socket, and the electronics are tightly packed inside it. The globe part is completely sealed, so access comes through the E27 socket area. The author needed a lot of prying to remove the board. They reassembled and glued it back, but warned against trying. [#20605675]

How does the light quality of the Calex Smart Globe G125 look in real use after flashing OpenBeken?

The thread does not provide a real-use light quality result after flashing OpenBeken. A reply asks, "How does the light from this bulb looks in reality?" but no answer appears in the supplied posts. The available facts cover flashing, teardown, CBLC5 identification, and the 2 PWM white channels only. [#20605734]

Tuya-cloudcutter vs serial flashing: which method is better for flashing a BK7231N Calex smart bulb?

tuya-cloudcutter is the better-supported method in this thread because it was actually used successfully. The post does not report serial flashing. It also shows that opening the bulb needs adhesive cracking, board prying, and glue reassembly. For this Calex G125, tuya-cloudcutter avoids the teardown route described later. [#20605675]

What is tuya-cloudcutter and how does it work with Tuya BK7231N smart bulbs?

tuya-cloudcutter is the flashing tool used here to install OpenBeken on the Tuya-based Calex bulb. "tuya-cloudcutter is a firmware flashing workflow that targets compatible Tuya smart devices, letting this BK7231N CBLC5 bulb receive OpenBeken without the teardown steps shown later." The thread confirms it was used for this device. [#20605675]

What safety precautions should I take when opening or flashing an E27 mains-powered smart LED bulb?

Disconnect the E27 bulb from mains power before opening, prying, or touching the board. The thread shows all electronics inside the socket, while the globe is sealed. That means the teardown area is the same compact housing that normally connects to mains. The safest thread-backed route is non-destructive identification and tuya-cloudcutter flashing. [#20605675]