Zigbee RSSI value

[Marwa Sabbagh]

Hello, I'm working with nRF5340 DK with Zigbee communication. I'm getting RSSI values between 0-255, but I'm more interested in the value in dBm, so I would like to convert the value to dBm. Could you tell me how I can do that?

Best regards.

[Marte Myrvold]

Hi,

What are you using to get the RSSI value?

Best regards,

Marte

[Marwa Sabbagh]

Hi,

I am using zb_zdo_get_diag_data()

Best regards,

Marwa

[Marte Myrvold]

Hi Marwa,

I tried to use this myself, but was unable to figure out how to get RSSI as dBm. I have asked our developers for clarification regarding this, so I will come back to you when I hear from them.

Best regards,

Marte

[Marte Myrvold]

Hi Marwa,

You can use the function nrf_802154_dbm_from_energy_level_calculate() to convert energy measured in 0-255 to dBm:

zb_uint8_t lqi, rssi;
int8_t rssi_dbm;
zb_zdo_get_diag_data(0x0000, &lqi, &rssi);
rssi_dbm = nrf_802154_dbm_from_energy_level_calculate(rssi);

Best regards,

Marte

[Marwa Sabbagh]

Hello, is it accurate that as the distance between the DK increases, the more negative value in dBm it will be?