[BK7231N] Avatar ALS08L-B22 Smart Bulb Teardown and OpenBeken Flash Guide Template GPIO

Bruno23 31 Jul 2023 17:04 2 2604 Cool? (+3)

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TL;DR

Avatar ALS08L-B22 smart bulbs now use the Beken BK7231N chip instead of the Tasmota-supported design.
Opening the bulb requires popping off the plastic cover, prying out the LED board near the connector, and removing the two small metal contacts to free the second board.
The WiFi board pinout is mapped for flashing, and only three wires were soldered because ground came from the LED board connector.
Belkin GUI Flash Tool automatically picked up the device configuration, and two bulbs were flashed successfully.

Summary generated by AI based on the discussion content.

I bought a pack of these bulbs as they were listed as supported under Tasmota but the design seems to have changed to using the Beken BK7231N chip.

The bulbs look pretty basic.
I used a pry tool to pop the plastic cover off

The easiest way to remove the led board is by prying next to the connector as shown in the image

We need to get the second board out and the easiest way to do this is to pry off the two small metal contacts on the bottom of the bulb. Other socket types probably come apart in different ways

When the two contacts are pried off the board just falls out. I put a small black mark on the side where the black wire connects.

We can now inspect the WiFi board to figure out the pinout needed
Here is the pinout needed to flash the firmware

And here is the board once some wires have been soldered to flash the firmware

I only soldered 3 wires as I used the ground pin on the LED board connector for my ground

When using Belkin gui flash tool the software should automatically pick up the configuration of the device from the firmware. I have included it in this guide.

Once flashed the bulbs are ready to be setup. I have done this on two bulbs so far.

Attachments:

config.txt (2.21 KB) You must be logged in to download this attachment.

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Bruno23 wrote 4 posts with rating 10 . Been with us since 2023 year.

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p.kaczmarek2 01 Aug 2023 07:51

Thank you, it's nice to see another device getting free from the cloud! Very well done, I can also see that my automatic GPIO importer worked well and detected SM2135 driver. Here's OBK template for... [Read more]

Bruno23 01 Aug 2023 11:23

Thank you! The GPIO detector worked perfectly, and the bulb worked right away when I imported the generated config. [Read more]

FAQ

TL;DR: For B22 owners flashing this bulb, 2 removed base contacts let the driver board drop free, and one expert said it was "free from the cloud!" The confirmed working path is BK7231N flashing plus an OpenBeken template with SM2135 on pins 24 and 26, solving the mismatch between a Tasmota listing and newer hardware. [#20675824]

Why it matters: This FAQ turns a forum teardown into a repeatable, searchable answer for safely opening, flashing, and configuring the Avatar ALS08L-B22.

Item	Tasmota listing	Actual reported hardware/path
Bulb support expectation	Listed as supported	Board design changed to BK7231N
Working firmware route	Not confirmed in the thread	OpenBeken flashed and working
Configuration result	N/A	Auto-import detected SM2135 and worked right away

Key insight: The decisive finding is not the shell teardown; it is that the newer ALS08L-B22 revision uses a BK7231N/CBLC5 platform, and the generated OpenBeken config worked immediately after import. [#20675824]

Quick Facts

The working OpenBeken template names Avatar ALS08L-B22, chip BK7231N, board CBLC5, with SM2135DAT on pin 24 and SM2135CLK on pin 26. [#20675824]
The teardown used 3 soldered wires for flashing because ground was taken from the LED-board connector instead of adding a fourth wire. [#20675168]
Removing 2 small metal contacts from the B22 base releases the second board, making board extraction simpler than prying the assembly from the side. [#20675168]
The reported command is backlog LED_Map 2 1 0 4 3, and the generated configuration reportedly made the bulb work right away after import. [#20675824]

1. How do I open an Avatar ALS08L-B22 smart bulb without damaging the plastic cover or internal boards?

Open it by first prying off the plastic diffuser with a pry tool, then working on the internal boards separately. The teardown shows the cover pops off first, and the next safe move is prying near the LED-board connector instead of levering against random edges. That reduces stress on the LED board and the Wi-Fi board. [#20675168]

2. What is the easiest way to remove the LED board from the Avatar ALS08L-B22 bulb during a teardown?

The easiest method is to pry next to the connector on the LED board. The teardown explicitly marks that area as the best release point, which helps the board lift out cleanly. Using that location is more controlled than pulling from the middle of the board. [#20675168]

3. How do you get the second board out of a B22 smart bulb after removing the LED board?

Remove the 2 small metal contacts at the bottom of the B22 base, and the second board falls out. The thread notes this is the easiest route for this socket style. It also warns that other socket types may come apart differently, so do not assume the same release method on every bulb. [#20675168]

4. What pinout do I need to flash OpenBeken firmware onto the BK7231N chip in the Avatar ALS08L-B22 bulb?

Use the flash pinout shown on the exposed Wi-Fi board, then solder to the marked pads before flashing. The author confirmed a working setup and also noted a practical shortcut: only 3 wires were soldered because ground came from the LED-board connector. That means the flash setup did not require a separate fourth ground lead on the Wi-Fi board itself. [#20675168]

5. How can I flash a BK7231N-based Avatar ALS08L-B22 bulb using the Beken GUI flash tool?

Flash it in 3 steps: 1. Expose the Wi-Fi board and solder the needed leads. 2. Connect the bulb board to the Beken GUI flash tool. 3. Let the tool auto-read the device configuration from firmware, then flash and import that config. The post says the software should automatically pick up the configuration, and the bulbs were ready for setup afterward. [#20675168]

6. Why did this Avatar ALS08L-B22 bulb show up as Tasmota-supported but actually contain a BK7231N chip instead?

Because the reported bulb appears to be a newer hardware revision than the one expected from the listing. The buyer says it was listed as Tasmota-supported, yet the teardown found a BK7231N chip instead. That points to a design change inside the same product name rather than a flashing mistake. [#20675168]

7. What OpenBeken template and GPIO configuration work for the Avatar ALS08L-B22 smart bulb with the CBLC5 board?

The posted working template uses vendor Tuya, model ALS08L-B22, chip BK7231N, board CBLC5, and pins 24 and 26 for the SM2135 interface. Specifically, pin 24 is SM2135DAT;0, pin 26 is SM2135CLK;0, and the command is backlog LED_Map 2 1 0 4 3. That is the exact configuration shared as the successful OBK template. [#20675824]

8. How does the automatic GPIO importer in OpenBeken detect the SM2135 driver on this bulb?

It detected SM2135 from the firmware configuration automatically enough to generate a usable template. An expert reply states the automatic GPIO importer worked well and detected the SM2135 driver, and the follow-up confirms the generated config worked immediately after import. In the thread’s words, the detector “worked perfectly.” [#20675824]

9. What is the SM2135 LED driver, and how is it used in smart bulbs like the Avatar ALS08L-B22?

"SM2135 is an LED driver that the automatic GPIO importer detected on this bulb, identifying the data-and-clock controlled lighting interface used by the board." In this template, it is wired through two signals: SM2135DAT on pin 24 and SM2135CLK on pin 26. Those two assignments are the key GPIO facts reported for this bulb. [#20675824]

10. What is BK7231N, and how is it different from the chips commonly used in older Tasmota-compatible bulbs?

"BK7231N is a Wi-Fi control chip used on this newer bulb revision, replacing the older design the buyer expected from a Tasmota-supported listing." In this case, the difference is practical: the thread documents a successful OpenBeken flash path for BK7231N, not a confirmed Tasmota workflow for the hardware actually found inside the bulb. [#20675168]

11. OpenBeken vs Tasmota for BK7231N smart bulbs: which is the better choice for the Avatar ALS08L-B22?

OpenBeken is the better-documented choice in this thread for the Avatar ALS08L-B22. The bulb was expected to match a Tasmota-supported design, but the teardown found BK7231N hardware, and the posted OpenBeken template plus auto-import worked right away. The thread does not provide a successful Tasmota result for this specific revision. [#20675824]

12. How should I wire power, ground, and data lines when soldering to the Avatar ALS08L-B22 board for flashing?

Solder the required flash wires to the Wi-Fi board, but you can take ground from the LED-board connector. The author used only 3 soldered wires because the ground pin on the LED-board connector served as ground. A small black mark was added on the side where the black wire connects, which helps preserve orientation during reassembly. [#20675168]

13. What does the OpenBeken command "backlog LED_Map 2 1 0 4 3" do for the Avatar ALS08L-B22 bulb?

It is the exact command bundled with the working template for this bulb’s LED-channel mapping. The thread does not explain each number individually, but it does show that the command belongs to the confirmed ALS08L-B22 configuration for BK7231N and CBLC5. In practice, it is part of the setup that made the generated config work immediately after import. [#20675824]

14. What safety precautions should I take when disassembling and flashing a mains-powered B22 smart bulb?

Use a controlled pry method and keep track of orientation before reassembly. The teardown shows two practical precautions: pry the diffuser and LED board at specific points, and mark the side where the black wire connects. That matters because this is a mains-powered B22 bulb, and careless disassembly can damage boards or reconnect wires incorrectly. [#20675168]

15. How can I troubleshoot an Avatar ALS08L-B22 bulb if it is not detected correctly by the Beken GUI flash tool or does not work after importing the generated config?

First verify that you exposed the correct Wi-Fi board, soldered the flash leads securely, and used the generated BK7231N/CBLC5 template with pins 24 and 26 assigned to SM2135. If the bulb still fails, recheck the ground path, because this build used a 3-wire setup with ground borrowed from the LED-board connector. The thread’s successful result came after the tool auto-read configuration and the generated config was imported unchanged. [#20675824]

Summary generated by AI based on the discussion content.