When testing the Bluetooth range on a device using the nRF53 SoC it’s useful to know what the RSSI is from the perspective of the SoC.
hci_pwr_ctrl example in the
nrfconnect/sdk-zephyr repo contains example code that reads back the RSSI. See https://github.com/nrfconnect/sdk-zephyr/blob/b9253f60e83c046fa432d49b157e1536af1f1ab2/samples/bluetooth/hci_pwr_ctrl/src/main.c for the core parts of this.
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