NRF52840 Zigbee cli router example communication distance

[cai_2020]

I am using the zigbee sdk4.10  cli_agent_router and multi_sensor example. The 52840 module is E73-2G4M08S1C,  antenna is a built-in ceramic antenna. During operation, the communication distance is only about 15 meters, zdo mgmt_lqi addr  lqi check the lqi value is less than 10. the transmission power has been set by nrf_802154_tx_power_set (8) in the program, is this communication distance normal?Is there any way to improve?  

[Edvin]

Hello,

Right before you can't maintain the connection, can you check the received strength from the incoming packets using this API?

The range of the radio heavily depends on the environment. What sort of obstackles do you have? Is it indoors? Outdoors? What kind of walls? 

BR,

Edvin