BLE 5, Thread, Zigbee Modules, BT840/F/E/X/XE
Ver 1.16 Dec.. 2019
4. Bluetooth Range Measurements
Bluetooth range measurement reports and hex codes used in measurements can be downloaded from
Bluetooth Range Measurements
section of this webpage.
http://www.fanstel.com/download-document/
Bluetooth ranges are measured between 2 modules on evaluation boards for various height of antenna. On the
first measurement, both antennas are pointing to sky and facing each other. The second antenna is rotated by
30 degrees clockwise after each measurement.
Bluetooth range is specified as the average of 12 measurements with the least significant digit truncated.
• 1.52 meters (60 inches) is typical height of thermostat in the USA.
• 0.55 meter (21.5 inches) is typical height of antenna if an IoT device is plugged into a wall AC outlet in the
USA. When
USB dongle is plugged into a smart phone charger plugging into a wall AC outlet to
collect Bluetooth sensor data or to be used as a Bluetooth signal repeater.
• Low Multiple Path Interference (
LMPI
). For longer range measurement, antenna must be higher to have
LMPI. To have LMPI, 60% clearance is required. For example, if transmitter and receiver is 1000 meters
away, both antennas must be 3.33 meters above ground and away from any obstruction.
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