No Bluetooth Signal on Dev Board.

[sezai]

Hello,

I am beginner for bluetooth technology  and have very  interesting to this  technology

 I have developed   new board (4 pcs) for nrf 52832 and soldered all parts from murata basic developers kits.  

If I  touch  after flashing of chip to  X2 (marked on pcb with whithe clour) I see short time bluetooth name on  nRF Connect, but I have not any connection. All pins are checked dont found any issue. 

I  can flash chip  without any issue. I am using nRF5_SDK_15.2.0_9412b96 =>pca10040  (ble_app_blinky) example without any change. 

My flash process:

I have    deleted  chip  first with RFgo Studio (erase all) than  debuged the  example with segger studio and written to chip. Should do anything 

What   is wrong in my process or device?

 

 

[AmbystomaLabs]

Your issues look like 100% layout problems.  For starters the footprint for the epad is considerably too small.  You should refer to the reference design for guidance on this. 

If you want a more thorough review and explanation, please also post the ground plane layer.

[sezai]

Hello,

thank for your  answer. Here is my data..

Thingy52_OutputFiles.zippca20020_sheet2_mcu.SchDoc

 NordicMeshV01.PcbDoc

[ketiljo]

What is the part number of the 32 MHz crystal you're using? 

[AmbystomaLabs]

Sezai, I reviewed your design documents.  There are so many layout issues with your board, it is not worth trying to debug. The ground plane is wrong, the stitching vias are missing, caps are in the wrong place or too far from the chip to do any good, the ground plane is broken, etc., etc.

You need to respin this board and follow the design guidelines for the nRF52832 in the reference design. You can also submit your design to the Nordic team prior to having it made.