TX Power GATT Service (UUID: 0x1804)

[adam_atmo]

Hi,

I would like to create a service that shows the current TX power of a peripheral during connection. I am using the Android nRF Connect app to connect to the nRF52833 DK and I have used the Bluetooth: Peripheral HT sample from Zephyr. There is an existing GATT service with UUID 0x1804 for TX power. How do I use it in my code? And where do I find more information on implementing GATT services using nRF Connect SDK? This tab on the nRF Connect SDK docs only shows a few GATT services.

Thanks,

Adam

[Kenneth]

Hi,

You may find this discussion useful:
set tx power with tx power service on zephyr 

Also see: 
https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/samples/bluetooth/hci_pwr_ctrl/README.html 

Kenneth

[adam_atmo]

Thank you Kenneth,

The discussion you linked to does not provide information on how to actually implement the TPS (TX power service) and the HCI power control example that you linked to does not use the TPS either (I have used this sample before). I have also read the specification on the TPS from Bluetooth SIG and it does not provide information on how to incorporate the TPS in an application's source code.

How do I implement this service so that I can read TX power from the central?

Thanks

[Kenneth]

Hello,

I must admit I didn't read the thread, I just noticed the original post mentioned the zephyr/subsys/bluetooth/services/tps.c which I believe is what you are looking for here?

To understand what the BT_GATT_SERVICE_DEFINE() does here you can go to 27:20 in this webinar:
https://webinars.nordicsemi.com/developing-bluetooth-low-energy-6 

Kenneth