BLE � Bluetooth Low Energy
Bluetooth Low Energy (BLE) je bezdr�tov� protokol navrhnut� pre ultra-n�zkoenergetick� zariadenia, ktor� pren�aj� mal� objemy d�t na kr�tke a� stredn� vzdialenosti. BLE je optimalizovan� pre IoT senzory, nositeln� zariadenia, beacony a priemyseln� monitoring.
BLE 5.4 � Aktu�lna �pecifik�cia
| Parameter | Hodnota |
|---|---|
| Frekvencn� p�smo | 2,4 GHz ISM |
| D�tov� r�chlost | 1 Mbps / 2 Mbps / 125�500 kbps (LE Coded) |
| Dosah | 10�100 m typicky, a� 240 m, 1+ km s LE Coded PHY |
| Spotreba | 5�15 mA (vysielanie), <1 �A (sp�nok) |
| Zabezpecenie | AES-128-CCM, LE Secure Connections (ECDH P-256) |
BLE vs. ostatn� IoT protokoly
| Protokol | Dosah | Spotreba | R�chlost | Najlep�ie pre |
|---|---|---|---|---|
| BLE 5.4 | 10�240 m | Ultra-n�zka | 1�2 Mbps | Nositeln�, senzory |
| LoRaWAN | 5�15 km | Ultra-n�zka | 0,3�50 kbps | Vzdialen� senzory |
| Wi-Fi 6 | 50�100 m | Stredne vysok� | 100+ Mbps | Kamery, br�ny |
| Thread/Matter | Mesh (300 m) | N�zka | 250 kbps | Smart home |
S�visiace pojmy
- IoT � BLE je najroz��renej�� IoT protokol pre kr�tke vzdialenosti.
- Secure Element � Hardv�rov� �lo�isko kl�cov pre BLE identitu zariadenia.
Navrhujeme BLE produkty na platform�ch Nordic nRF a ESP32. Pozrite V�voj Embedded Syst�mov.