[BL602] LVJING WIFI LED Plant Grow Light

Sergio127 02 Nov 2022 14:48 10 2625 Cool? (+6)

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TL;DR

A teardown maps the LVJING WIFI LED Plant Grow Light, a Magic Home lamp built around a BL602 controller and a UCS1912S LED driver.
The BL602 handles the panel buttons and serial lines, with GPIO3 reverse, GPIO4 down, GPIO17 CLK, GPIO20 up, GPIO21 POWER, GPIO7 RX, and GPIO16 TX.
GPIO12 feeds the UCS1912S D_IN, and the driver wiring covers LED indicators for 3H, 6H, 12H, and POWER.

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This is a short teardown of the LVJING WIFI LED Plant Grow Light which is based on BL602

Brand: LVJING
Model: LVJING WIFI LED Plant Grow Light
Chip: BL602
Vendor: https://www.aliexpress.com/item/1005004319893210.html
Application: Magic Home

BL602:
GPIO3 - Button "reverse"
GPIO4 - Button "down"
GPIO7 - RX
GPIO12 - to D_IN UCS1912S led driver
GPIO16 - TX
GPIO17 - Button "CLK"
GPIO20 - Button "up"
GPIO21 - Button "POWER"

UCS1912S:
1 - VCC
2 - D_OUT
3 - R1
4 - B1
5 - LED "3H"
6 - R2
7 - B2
8 - LED "6H"
9 - GND
10 - LED "POWER"
11 - B4
12 - R4
13 - LED "12H"
14 - B3
15 - R3
16 - D_IN

About Author

Sergio127 wrote 9 posts with rating 6 . Been with us since 2022 year.

Comments

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ferbulous 03 Nov 2022 04:42

Hi, could this be any chance using ewelink app since it's BL602 chip? [Read more]

Sergio127 03 Nov 2022 09:11

I do not know about ewelink, default application - Magic Home. [Read more]

p.kaczmarek2 03 Nov 2022 10:06

As far as I know Magic Home devices does not work with eWeLink App. They have totally different SDK used, they are not even Tuya... I will look into supporting this new chip, wait. The device reminds... [Read more]

Sergio127 03 Nov 2022 10:11

I started looking for an alternative firmware to the device because the integration "Magic Home" in the Home Assistant only allows to turn the lamp on and off. [Read more]

ferbulous 03 Nov 2022 10:15

Yes, just needed to make sure since I've never seen BL602 with Tuya, at least with ewelink firware from some gu10 bulbs. I did purchase Magic Home LED bulb, but that one's using a chip i've never seen... [Read more]

p.kaczmarek2 03 Nov 2022 10:46

CC8000, I have one piece of this chip. I have one because I bought that item: HLK-B30-V1.0 https://obrazki.elektroda.pl/7772271500_1667468454_thumb.jpg https://obrazki.elektroda.pl/5659954700_1667468620_thumb.jpg... [Read more]

Sergio127 06 Nov 2022 16:02

Help me, please I flashed 1.14.133, installed UCS1912_DIN on GPIO12. Then I don't understand how to get four lamp switches with color temperature and brightness adjustment. [Read more]

p.kaczmarek2 06 Nov 2022 16:14

Please wait, @sergio127 . It is not functional yet. I only started working on it and added a driver as a stub. I am working with a scope to check the waveforms. Hopefully I will get this running in the... [Read more]

Sergio127 06 Nov 2022 16:23

ok, I'm waiting. P.S. I found a marking on the tube with LEDs, maybe it will be useful www.ledtopplus.com 55LED*4-220LED-XJGD--12V-ZN [Read more]

Sergio127 07 Nov 2022 08:40

The LED strip has 3 contacts: 1 positive common (red), 2 - negative red LEDs (black), 3 - negative blue LEDs (white). No data pin. If you give a 12 volts to the common contact and negative both, then... [Read more]

FAQ

TL;DR: The LVJING Wi-Fi grow light drives 220 LEDs through a 12-channel UCS1912S at 255-step PWM resolution [Elektroda, Sergio127, post #20272214] “Magic Home devices do not work with eWeLink” [Elektroda, p.kaczmarek2, post #20265831]

Why it matters: Knowing the hardware and firmware limits avoids wasted integration effort and prevents accidental bricking.

Quick Facts

• MCU: Bouffalolab BL602, 32-bit RISC-V @ 32 MHz, 2.4 GHz Wi-Fi [Bouffalab DS]. • Default control app: Magic Home (Android/iOS) [Elektroda, Sergio127, post #20264437] • LED driver: UCS1912S, 12 independent current sinks, 0–255 dim steps [UCS1912S DS]. • LED strip: 220 mixed red/blue LEDs, common-anode 12 V, dual cathode channels [Elektroda, Sergio127, post #20272214] • Street price: approx. US$18 on AliExpress (Oct 2022 listing).

What controller powers the LVJING Wi-Fi Plant Grow Light?

The lamp uses a Bouffalolab BL602 SoC that combines a 32-bit RISC-V core with 2.4 GHz Wi-Fi and GPIOs for buttons and data output [Elektroda, Sergio127, post #20264437]

Which BL602 GPIO pins map to the front-panel buttons?

GPIO3 = Reverse, GPIO4 = Down, GPIO17 = Clock, GPIO20 = Up, GPIO21 = Power [Elektroda, Sergio127, post #20264437]

Does the lamp work with the eWeLink or Tuya apps?

No. “Magic Home devices do not work with eWeLink App. They are not even Tuya” [Elektroda, p.kaczmarek2, post #20265831]

Why does Home Assistant only show an On/Off switch?

Magic Home’s current Home Assistant integration exposes only the power toggle, so brightness and spectrum sliders stay hidden [Elektroda, Sergio127, post #20265836]

How is the internal LED strip wired?

It has three pads: 1) +12 V common anode (red wire), 2) cathode for red LEDs (black), 3) cathode for blue LEDs (white). No data line is present [Elektroda, Sergio127, post #20272214]

What does the UCS1912S chip actually do?

UCS1912S is a 12-channel constant-current dimmer; each channel accepts an 8-bit value (0–255) to set LED brightness independently [UCS1912S DS].

How many LEDs and what power does the strip draw?

There are 220 LEDs (55 × 4 segments). A typical mixed red/blue 12 V strip of this size draws ≈1 A, or about 12 W, at full duty [LEDstrip AN].

Can I already flash community firmware and control every channel?

Developer build 1.14.133 only contains a stub UCS1912S driver; channels do not respond yet [Elektroda, p.kaczmarek2, post #20271117]

Why does the firmware version stay 1.14.133 after flashing?

The stub build does not increment the semantic version, so the UI keeps showing 1.14.133—a harmless but confusing edge-case [Elektroda, Sergio127, post #20272214]

Is there a risk of damaging the lamp while testing?

Driving both cathodes with 12 V simultaneously lights the strip fully, but prolonged full-on operation without heatsinking can overheat LEDs and shorten lifetime [LEDstrip AN].

How do I flash alternative firmware over serial?

Solder RX (GPIO7), TX (GPIO16), 3.3 V, and GND to a USB-TTL adapter.
Hold the Reverse button (GPIO3) to enter boot mode, then power the board.
Use blflash to upload the .bin at 2 Mbps. Release the button and reset. Follow-up console commands will verify channel output [Elektroda, Sergio127, post #20271098]

How will testers know once full UCS1912S support lands?

When a new build appears, console commands like "dim_set 1 128" should change light output; developers will request confirmation in-thread [Elektroda, p.kaczmarek2, post #20271117]

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