Toggling GPIO using BLE UART

[Akshat Lalit]

Hello I am using nRF52832 board and trying to toggle the LEDs using ble uart code. I tried to modify the following function as follows. I am able to send the 1 from the nRF connect app and the LED glows . But when I send 0, the LED does not turn off. Am I doing something wrong or I have to call the function in the main function as well? I have modified the function ble_peripheral_uart code.                                                                                                                                                                                                            

[Hieu]

Hi Akshat,

The signature of nus_data_handler() you are showing here is not similar to that of our latest nRF5 SDK version, v17.1.0. What SDK version are you using?

If you are starting, I would recommend you check out the nRF Connect SDK (NCS), which is newer and is in active development.
If a move to NCS is too drastic (it could be), I would recommend at least using the latest version of nRF5 SDK instead. That would be v17.1.0.

Hieu

[Akshat Lalit]

Sir I am using SDK V16.00 and the original code of the nus_data_handler was as follows: 

[Akshat Lalit]

I modified the above code to the first screenshot which I shared

[Hieu]

Thanks for the clarification, Akshat.

I suspect the issue is because the pin is controlled by the Board Support Package (BSP) module. Could you please try one of the following and see if the problem goes away:

• Use a different pin from the 4 LED pins of the DK, and an external LED to test
• Comment out all code that uses the BSP module

That is just to narrow down where the root cause is. If my guess is correct but you wish to use the BSP module and the LED on the board, we can go through some modifications to make it work together.

By the way, if you want to toggle the LEDs using BLE, then the BLE Blinky Example might be a good reference.

[Akshat Lalit]

Thank you sir this resolved my issue