SJR-BTM525 QCC5125 Module is not working..

[korean]

I connected the battery (4.2V) to the correct pin number, but the LED does not light up
and Bluetooth is not found.
What should I do? please help me.

 

[Jcris]

Maybe the + and - are switched so led won’t light?
Also, what Bluetooth board is that?

 

[HumbleDeer]

Maybe the + and - are switched so led won’t light?
Also, what Bluetooth board is that?

Likely some variant sold of this
https://www.aliexpress.com/item/1005003772932044.htmlthat's made by SJR, a Chinese OEM.
Datasheet is here http://www.tianjiarun.com/zb_users/upload/2020/04/SJR-BTM525_SPEC.pdf

Commonly used in products with BT receivers like https://www.aliexpress.com/item/1005002035641180.html

I connected the battery (4.2V) to the correct pin number, but the LED does not light up
and Bluetooth is not found.
What should I do? please help me.

OP, can you make sure that the pins you soldered match with the datasheet?

Then, once you have, make the wires short enough so they can never short, and hook up the wires that the datasheet describes as required for battery operation. The pin descriptions below have more description; or search for 'battery' in the datasheet (ctrl+f)

 

[Jcris]

Did you get this figured out?

 

[Danny Chung]

Please refer to datasheet

 

[5th element]

You don't just wire these up and expect them to turn on. The SYS_CTRL pin is used to wake them up and how this behaves is dependent on the way the module is configured.

 

[Jcris]

View attachment 1019733
I connected the battery (4.2V) to the correct pin number, but the LED does not light up
and Bluetooth is not found.
What should I do? please help me.

Hey
Did you resolve this?
Hope so