Bluetooth low energy operates in the 2.4 GHz ISM (Industrial Scientific Medical) band (2402 MHz - 2480 MHz), which is license-free in most countries. The recent changes in the Bluetooth and regulatory standards allow Bluetooth Smart devices to transmit up to 100 mW (20 dBm) transmit power. However not all countries allow the 100 mW transmission power to be used because Bluetooth low energy radio can drop down to two RF channels when there is significant interference.
See also:
DigiKey BLE Devices
Bluetooth Low Energy weather station
Getting Started with the BlueGiga BLE112 Bluetooth Low Energy module
Silicon Labs - UG103.14: Bluetooth® LE Fundamentals
Summary
bluetooth distance
I’m looking for a practical Bluetooth RSSI estimator (something like a Wi-Fi range estimator). Any suggestions would be appreciated. Thanks.
Hello hellogpio, welcome to the Forum Community! This page covers WLAN range calculator or wifi range calculator . This WLAN range calculator takes frequency, transmit power, receiver sensitivity, antenna gains, fade margin as inputs and provides coverage range as output. The formula for this wifi range calculator is also mentioned.
Are you looking for an instrument to measure Bluetooth RSSI, or components to build one? If the former, there are apps for smartphones one can search for which do this for both Android and Apple devices. A quick search on Google will produce several examples.
If you are intending to build a stand-alone device, most Bluetooth modules can measure RSSI and one could read this out with a microcontroller or microprocessor.
