https://devzone.nordicsemi.com/f/nordic-q-a/16937/nrf51822-ble-max-rangeHello, what is the BLE max range w/out usin PCB antenna? And what range ll be if i reducing the connection interval down to the minimum 7.5ms, set Tx power to +4dBm using sd_ble_gap_tx_power_set and use 250kbps data rate? I think that range will be abouten-USTelligent Community 13Mon, 10 Oct 2016 09:15:25 GMThttps://devzone.nordicsemi.com/thread/64918?ContentTypeID=1Mon, 10 Oct 2016 09:15:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:596195cc-511a-44c9-a759-31b1cdf2a317FormerMember<p>The range depends on the antenna and the PCB design, the TX power, and the baudrate. In BLE, the baudrate is 1Mbps and it cannot be changed. For the antenna and the PCB, it is important that the antenna is placed according to its datasheet, and that there is as much ground as possible. In addition, as @Dave_couling says, tuning of the antenna is important in order to minimize the loss between the chip and the antenna.</p> <p>The antenna you refer to should work fine.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/64917?ContentTypeID=1Sat, 08 Oct 2016 19:03:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:297f253d-0425-490d-8d80-a72671c7f078Dave_couling<p>It depends on the PCB design (size, ground place) as well as how well the Antenna has been tuned ( T or Pi circuit). All these things being somewhat ideal, you should get 10m without issue, but with such fast connection parameters, your link will drop very quickly..</p><div style="clear:both;"></div>