Bluetooth low energy (BLE) was started as part of the Bluetooth 4.0 core specification. BLE uses short-range radio with minimum power and operates for a long time. Its range coverage is about 100 meters, which is roughly about 10 times more than conventional Bluetooth. Latency of BLE is 15 times lesser than that of conventional Bluetooth. BLE operates using a power between 0.01 mW and 10 mW. These characteristics make BLE an ideal protocol for use by IoT devices.
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