Pushing Bluetooth out to 12 Kilometers
A recent demonstration has extended the range of Bluetooth technology to 12 kilometers, or about 7.5 miles, using a custom setup.
The demonstration shows that Bluetooth's limited range is primarily a product of its typical implementation rather than a fundamental protocol limitation.
nktbuilds achieved a range of 12 kilometers by employing a parabolic antenna to capture more signal and a sensitive receiver with a much lower noise floor.
The setup used a standard, generic coin-sized Bluetooth tracker tag for power, proving that the solution does not require extra power.
Technical Approach
The key to the extended range was not increasing power but optimizing the hardware to capture and process the signal more effectively.
The parabolic antenna replaced the small dipole antenna found in phones, while the sensitive receiver lowered the noise floor.
Practical Considerations
Despite the impressive 12-kilometer range, this is not a practical solution for long-distance communication.
For applications requiring hundreds of miles of range, protocols like LoRa remain superior, as they are designed for long-distance communication.
