Adam 1

• asked Nov 28, 2025

LD2451 - is logic 5V tolerant?

I see the datasheet states that the IO output levels are 3.3V but is the module 5V tolerant at the UART RX?

ld2451

0 votes

0 answers

36 views

Adam 1

• asked Nov 23, 2025

LD1115H-24G - Spectral Line Position

What is the meaning of "spectral line position" in the information provided via the UART interface on the LD1115H?

ld1115h

0 votes

1 answers

33 views

Adam 1

• asked Nov 23, 2025

LD1115H-24G - User Manual Command List Query

Hello - referring to the v1.2 User Manual (2021-12-06) for HLK-LD1115H-24G. The document says configuration commands are: th1, th2, dtime, mov_sn, occ_sn, save, get_all. BUT when "get_all" is sent, the returned values are like: th1 ...

ld1115h

0 votes

1 answers

26 views

Lieven 1

• asked Nov 19, 2025

hlk-7628n Factory firmware

hi, i am looking for the factory wet firmware. uboot still booting but the wrong firmware got flashedprevious

wrt-firmware

0 votes

4 answers

114 views

Adam 1

• asked Nov 18, 2025

LD012 Re-programming

Hello! The user manual for HLK-LD012-5G states: The state matches the specific resistance on the module to select the corresponding gear or use the external MCU reserved on the module to rewrite the internal parameters. But I cannot find do...

ld012

0 votes

1 answers

33 views

Vicbot 1

• asked Nov 18, 2025

The official firmware of HLK-7688A module.

Hello, I found your firmware from the link below: [https://drive.google.com/drive/folders/1fNV08Eu1_OCQUpqZ8By9CD68w4Ibh8fZ] Is the firmware marked in green box, named as "7688A openwrt.bin" your official firmware for HLK-7688A modu...

hlk-7688a

0 votes

0 answers

48 views

Vicbot 1

• asked Nov 18, 2025

My HLK-7688A module does not open web configuration page.

Hello, I recently bought your HLK-7688A module from Aliexpress, and I also referred your user's manual below explaining how to open web configuration page: Microsoft Word - 7628N user manual.doc [https://fccid.io/2AD56HLK-7628N/User-Man...

hlk-7688a

0 votes

1 answers

65 views

muhammed Dogan 11

• asked Nov 17, 2025

FM225 Face Recognition module Image Capture feature

Hi, We bought your FM225 face recognition module and we want to use it for capturing image with UART commands but module reject 0x71, 0x72, 0x74 commands. We tried it also with encryption but encryption failing. we couldnt communicate with ...

fm225-

1 votes

2 answers

98 views

admin 1

• asked Nov 13, 2025

LD2410 APP USE

HOW LD2410B TO USER

ld2410

0 votes

1 answers

140 views

Jacky 1

• asked Nov 12, 2025

ZW0901

Can you provide me a library for Arduino or a sample code about how to use HLK-ZW0901.Please give most about how to use it,For example regit and move fingerprint and more about the hlk-zw0901's function

support

0 votes

1 answers

68 views