P0.00 is unavailable

[alirazavihaeri]

Hi

I used a nRF51822 module in my bluetooth device.
The nRF module link:

https://www.aliexpress.com/item/33062339441.html?spm=a2g0o.productlist.0.0.50062ccfuPgavH&algo_pvid=11eaaf9b-b3e1-464a-8a23-f600233bb205&algo_exp_id=11eaaf9b-b3e1-464a-8a23-f600233bb205-2&pdp_ext_f=%7B%22sku_id%22%3A%2267599256428%22%7D

I managed to program it with st-link in Arduino IDE, as you explained.
Also, I connect the device to my phone via Bluetooth, and my LED control program works fine with nRFConnect.

My problem is that the P0.00 GPIO is not working at all.
I am sure that this pin is not damaged, because It works fine when a simple digitalWrite code is programmed to the board without adding the BLEPeripheral library.

Can you help me to solve my issue?

Thanks in advance for your help, and Thanks a lot for your good work and useful library.

Ali