what is the maximum range to connect 2 NRF51822 devices with Gazell

Question

Hello, 
 I was looking into Gazell and read that Gazell only allows pairing when Host and Device are in close proximity to each other. This range is about 30 centimeters. I was wondering if this range could be extended? and if this is possible what will be the range it could reach? 
 Thanks in advance, 
 Tim

Sigurd · Accepted Answer

The close proximity pairing feature in Gazell uses the RSSI measurement to detect if a device is in pairing range. 
 On the host side, the RSSI is compared against a threshold to decide if the device is in range, and is defined as 
 #define GZP_HOST_RX_POWER_THRESHOLD -64 ///< RSSI threshold for when signal strength in RX packet power is high enough.
 
 If you want to extend the pairing range, you can adjust this threshold to fit your requirements.