RE: BLE Central HR - How to read RSSI of the connected device

Samruddhi Jadhav — Fri, 13 Feb 2026 07:44:25 GMT

Hi,

On the nRF5340, to read RSSI while connected, you must use HCI commands from Zephyr. Here are some steps I would suggest:

1) Keep the connection pointer. In the central HR example, this should be: static struct bt_conn*default_conn;

2) Then after you are connected, you can get the controller's connection handle from a work item or main loop.

3) Use the standard Zephyr HCI API to send an HCI "Read RSSI" command. So, you ask the controller for RSSI.

4) Use a work item to call it

5) You can schedule the work instead of reading RSSI directly in your connected() callback.

Let me know if you have any further questions.

Best Regards,

Samruddhi