nRF52832 WLCSP CIAA, RF do not work!

[zwl496777001]

I have made a HDI 4-Layers PCB.  I referenced the example PCB, but my board it do not work.

The softdevice is:s132_nrf52_6.0.0_softdevice.hex

The example code is: ble_app_uart.

The example code runs normally ,but there is no RF signal.

My board:

My schematic:

My PCB:

[awneil]

zwl496777001 said:

there is no RF signal

How do you determine that?

[zwl496777001]

I test that in two ways ：

1.A phone close to it .

2.Use an oscilloscope, put the probe to ant pin. A legible pulse can be captured in the ant pin of nRF52832-QFAA .

Do you have a batter method?

[awneil]

A phone will only recognise valid BLE advertising - it does not show that there is no RF signal!

An oscilloscope is no use here - you're looking for a 2.4GHz signal!!

Have you used the debugger to confirm that your code thinks that it is starting advertising?

[zwl496777001]

Thanks for your replay! I just write the example code ,ble_app_uart,into chip without any changes.Is there any differet operations between CIAA and QFAA?

[awneil]

Did you program the SoftDevice?

The Product Specification will tell you the differences between CIAA and QFAA

BTW

note that it's "reply" - not "replay".