Get Tx Power Field NRF52832 Beacon

RE: Get Tx Power Field NRF52832 Beacon

jeremias_cis — Tue, 05 Jun 2018 01:53:27 GMT

Hi folks, I solved my problem.

The problem was just the size of the buffer I declare: uint8_t uuid[26] at line 191;

Wen I copy the UUID to the buffer at line 213, the size p_gap_evt->params.adv_report.data.len indicate 27 bytes. But because my buffer have only 26 bytes the last position isn't copied. And this last position have the tx_power value that is exactly I want.

I hope this help others.

Thank you!

RE: Get Tx Power Field NRF52832 Beacon

jeremias_cis — Mon, 04 Jun 2018 16:01:04 GMT

Hi Hung Bui,

Thank you for your quick response.

The tx power I mentioned is a value sended by a peripheral device (the Smartphone in this case) that is used to calibrate purposes and estimate the distance between a central (NRF52 DK) and peripheral devices. Some beacon apps let you change this value like the picture I attached, but I cant see this value on the central side (NRF52 DK). I can read the UUID, Major and Minor values without problems.

If you need more information please let me know.

RE: Get Tx Power Field NRF52832 Beacon

Hung Bui — Mon, 04 Jun 2018 13:51:29 GMT

Hi Jeremi,

I'm not sure I fully understand your setup. You mentioned about " tx power reference at 1 meter sended by the Smartphone " Could you clarify what would the smart phone sends here ? What is the smartphone role in your application ?

There is a TxPower level inside advertising packet you can add. However, as far as I know, we don't use txpower in our beacon example. You can add the p_tx_power_level of advdata into your advertising packet.

When you change txpower, you need to update this value of the advertising data, it doesn't get updated automatically by the softdevice.