Which SDK example shall I use?

[Daliwan]

Hi, I am a newbie in nRF51 application. I am busy with a project which required the peripheral to communicate with the central once per second. Just to make sure that the peripheral is not lost. The project requires to save as much power as possible. Which SDK example shall I use? I read the files in proximity, but it mentions that it uses advertisement. Since Ad mode use 3 channels, I think it is better to use communication mode. What's more, can you give me any suggestion that in what documents I can find to control the Tx power, the time between each connection? Thanks.

[Daliwan]

By the way, how can I use whisper mode? Thank you.

[endnode]

"Whisper" mode seems to be lowest Tx Power setting (-30 or -40dBm depending on nRF5x platform) so simply use particular SD function (or update registers directly if you don't use Nordic stack). Just be ready for really really low maximum distance achievable with reasonably reliable link (= low packet loss) especially indoors.

[endnode]

And btw. that "send its UUID" doesn't make much sense in BLE GATT but I guess you will learn it... simply send "something" over your custom GATT Service&Characteristic (= these will have UUIDs, but that's different story)