I have a nrf52840dongle and a nrf54l15 custom board. And I flashed bt hci_usb demo into nrf52840dongle, uart_peripheral demo into nrf54l15 board.
Now I want to use my nrf52840dongle to read the RSSI of my nrf54l15, what command should I use to read it?
I have tried using `hcitool rssi <bt-address>` and `bluetoothctl info <bt-address>`, but neither showed me the RSSI value.