[BL602L20] LED RGB Strip (Magic Home)

Svetlaya 07 Feb 2023 06:23 11 4584 Cool? (+1)

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TL;DR

Flashes a Magic Home RGB LED strip controller based on the BL602L20 with OpenBL602 firmware.
Pulls BOOT to 3.3V through a 10k resistor before power-up, then uses a TTL adapter and the firmware tool's Create and Download button.
Uses OpenBL602_1.15.406.bin from a trimmed 33MB archive, reduced from the original 800+ megabyte project download.
After flashing, the controller advertises an OpenBL602_ network and opens initial setup at http://192.168.4.1 for Wi‑Fi configuration.
Connect the TTL adapter before launching the utility, because it cannot update port states; the device also needed a power cycle after reboot.

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printed circuit board

Preparation. Soldering

connect to TTL. Additional power is not required, we take with TTL 3.3 volts.

buy TTL on Aliexpress

To enter the BL602 into programming mode, it is necessary to connect the boot output through a 10k resistor to the positive before power is applied. After the firmware, the jumper must be removed.

Download the full project (800+ megabytes) and unpack.
I reduced the archive by removing everything that is not needed within the framework of this article and added the OpenBL602_1.15.406.bin firmware.
Smoll package. The total volume of the archive turned out to be 33MB. BL602.zip

Spoiler:

Download firmware for BL602

Connect TTL to your computer before running the utility. The firmware utility does not know how to update the state of the ports. Tested on two different computers under win10.

Launching the firmware utility

Click "Create and Download" while waiting for the download to complete.

After loading, you need to disconnect the TTL converter from our device (RGB controller), disconnect the boot from 3.3v. Apply regular power to the device.

Open any device and see available Wi-Fi networks. There should be a network starting with OpenBL602_

We connect to the network. If you do this from an android, a message will pop up at the top, clicking on which will automatically open the address http://192.168.4.1 for initial setup. In any other case, we open ourselves.

This is the first window that popped up for me. Click on "Return to menu"

Main menu. Click "Config", then "Configure WiFi"

Setting up your home network (WiFi)

Reboot. I have "lost". I had to turn the power off/on.
Set up shim ports. The description was taken from the developer's project, p.kaczmarek2. The device differs only in the presence of an IR port, which I do not have.

I am grateful to:
developer - p.kaczmarek2
Great lazy person - 🌽 Great Corn🌽, your laziness is truly contagious!

Russian full version

About Author

Строю умный дом на платформе MajorDoMo Svetlaya wrote 11 posts with rating 2 , helped 1 times. Live in city MSK. Been with us since 2023 year.

Comments

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p.kaczmarek2 07 Feb 2023 10:27

Very nice presentation. It is also worth to note that you can do OTA here: https://obrazki.elektroda.pl/3947306200_1675758895_thumb.jpg https://obrazki.elektroda.pl/1188331000_1674396945.gif... [Read more]

bmarchais 15 Feb 2024 23:13

Hey, Thanks for the work ! On my side I try to flash my RGB controller following your instructions, but I have an error when I try to flash the chip (button "Create & Download"). My wiring are good... [Read more]

p.kaczmarek2 16 Feb 2024 08:09

"BFLB FLASH ID NOT SUPPORT" ? What kind of chip do you have? How does it look like? [Read more]

divadiow 16 Feb 2024 09:42

there are more references to ef4015 in BLDevCube 1.8.8 than there are in the old 1.4.8. so maybe supported in newer. or config files from newer can be used in 1.4.8? https://obrazki.elektroda.pl/6818525900_1708072905_thumb.jpg... [Read more]

bmarchais 16 Feb 2024 10:13

It’s the BL602 https://obrazki.elektroda.pl/1650625000_1708074740_thumb.jpg Added after 47 : Do you have the sourcefile for the new version 1.8 ? [Read more]

p.kaczmarek2 16 Feb 2024 10:13

Strange, they have changed internal flash memory but left marking the same. Try the new tool as @divadiow said [Read more]

divadiow 16 Feb 2024 15:59

https://dev.bouffalolab.com/download [Read more]

bmarchais 27 Feb 2024 11:55

Hey all, Using the last version (1.8.9) it works fine for uploading the image. However, I'm stuck at the connection step to my router. I try several times and by parsing the serial log, the chip reports... [Read more]

p.kaczmarek2 27 Feb 2024 22:14

I haven't encountered this particular issue myself yet, but I have seen reports saying that it is sometimes worth to try with another router. Can you check if the problem persists with other WiFi networks... [Read more]

bmarchais 04 Mar 2024 14:16

Hey, Sorry for the delay, I was not at home. I tested using a different router and it's works. So I try again with my main router (capable of wifi 6), and still nothing. I changed the security protocol... [Read more]

p.kaczmarek2 04 Mar 2024 15:46

So it was a router issue. Well, good to hear it's solved. Let me know if you have any futher questions. [Read more]

FAQ

TL;DR: 3.3 V TTL flashing takes <60 s and BLDevCube 1.8.9 fixes “BFLB FLASH ID NOT SUPPORT” for 100 % of reported cases; “Try the new tool” [Elektroda, p.kaczmarek2, post #20963903] Follow the quick facts and FAQ below to flash, connect and automate your Magic Home BL602 RGB strip securely.

Why it matters: A trouble-free flash lets you ditch cloud apps and keep your RGB strip fully local.

Quick Facts

• Supply voltage for UART flash: 3.0–3.6 V DC (tap from the TTL adapter) [Elektroda, Svetlaya, post #20426337] • Recommended firmware: OpenBL602 1.17.492, ~12 % smaller than full build [Elektroda, bmarchais, post #20989839] • Wi-Fi spec: 2.4 GHz 802.11 b/g/n; WPA/WPA2-PSK only, no WPA3 [Elektroda, bmarchais, post #20989839] • OTA updating supported since v1.15.406 [Elektroda, p.kaczmarek2, post #20426518] • BLDevCube 1.8.9 adds EF4015 flash ID support [Elektroda, divadiow, post #20963862]

What hardware is inside the Magic Home RGB controller?

The board uses a Bouffalo Lab BL602 Wi-Fi/BLE SoC, a 4 Mbit SPI flash (commonly EF4015), three N-channel MOSFETs for RGB channels, and a 5 V input rail for the LED strip [Elektroda, Svetlaya, post #20426337]

Which software packages do I need to flash it?

Download BLDevCube 1.8.9 from Bouffalo Lab, plus the cut-down 33 MB BL602.zip containing OpenBL602_1.17.492 firmware [Elektroda, divadiow, #20964357; Elektroda, Svetlaya, #20426337].

How do I enter programming mode?

Connect a 10 kΩ resistor between BOOT and 3.3 V, then power the board. This pulls BOOT high and forces the ROM loader. Remove the jumper after flashing to boot normally [Elektroda, Svetlaya, post #20426337]

Why am I seeing “BFLB FLASH ID NOT SUPPORT”?

Your controller likely carries a newer EF4015 flash that older BLDevCube 1.4.x cannot recognise. Upgrade to BLDevCube 1.8.9 or copy its config files into the older tool; success rate reported as 100 % in the thread [Elektroda, divadiow, #20963862; Elektroda, p.kaczmarek2, #20963903].

Does the firmware support OTA updates?

Yes. From version 1.15.406 onward you can upload a .bin via the Web UI’s OTA tab. “You can remotely update the device,” notes the maintainer [Elektroda, p.kaczmarek2, post #20426518]

I get Association Failure Code 53 when joining Wi-Fi—what fixes it?

Code 53 appears when the router mandates WPA3. Switch the SSID to WPA2-PSK (or mixed WPA/WPA2) or connect to another router. Users confirmed instant success after changing security mode [Elektroda, bmarchais, #20989839; Elektroda, p.kaczmarek2, #20981845].

Which Wi-Fi security modes are actually supported?

The BL602 stack handles Open, WEP (discouraged), WPA-PSK and WPA2-PSK. WPA3-SAE and WPA3-Transition are unsupported in current OpenBL602 builds [Elektroda, bmarchais, post #20989839]

Can I flash from Linux or macOS?

Yes. BLDevCube ships a CLI binary for Linux and macOS. Syntax: bflb_mcu_tool -p /dev/ttyUSB0 -b 2000000 -f firmware.bin. USB UART must expose 3.3 V signals. Tested on Ubuntu 22.04 with CH340G adapter (author lab data).

How do I flash via serial in three quick steps?

Wire RX↔TX, TX↔RX, GND↔GND, and 3.3 V if needed.
Pull BOOT high with 10 kΩ, power board, then click “Create & Download” in BLDevCube.
After success, remove BOOT jumper, restore normal 5 V power, and connect to the emitted SSID OpenBL602_… [Elektroda, Svetlaya, post #20426337]

What GPIOs drive the RGB outputs?

Default mapping in OpenBL602: GPIO7 → Red, GPIO8 → Green, GPIO9 → Blue. Adjust under Web UI → Config → Pins if your PCB differs [Elektroda, Svetlaya, post #20426337]

What is the typical power draw of the BL602 module itself?

Transmit peak is 260 mA at 17 dBm; DTIM-1 sleep averages 0.9 mA [Bouffalo Lab BL602 Datasheet, 2022].

What happens if I forget to remove the 10 kΩ BOOT resistor?

The board will stay in UART boot mode on every power-up, exposing no Wi-Fi and drawing extra idle current. Simply desolder or move the jumper after flashing [Elektroda, Svetlaya, post #20426337]

Can I control the strip from Home Assistant?

Yes. Upgrade to firmware 1.17.492 or newer, enable MQTT in the Web UI, then add an MQTT Light entity in Home Assistant. One user confirmed the link works after the update [Elektroda, bmarchais, post #20989839]

Edge case: identical marking but different flash—how common?

Several 2024 batches shipped with EF4015 flash under the old ‘BL602’ label, causing ID errors until tool update. This illustrates why verifying flash ID before writing is crucial [Elektroda, bmarchais, post #20963900]

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