![Bluefruit LE Sniffer - Bluetooth Low Energy (BLE 4.0) - nRF51822 [Firmware Version 2] : ID 2269 : $24.95 : Adafruit Industries, Unique & fun DIY electronics and kits Bluefruit LE Sniffer - Bluetooth Low Energy (BLE 4.0) - nRF51822 [Firmware Version 2] : ID 2269 : $24.95 : Adafruit Industries, Unique & fun DIY electronics and kits](https://cdn-shop.adafruit.com/970x728/2269-03.jpg)
Bluefruit LE Sniffer - Bluetooth Low Energy (BLE 4.0) - nRF51822 [Firmware Version 2] : ID 2269 : $24.95 : Adafruit Industries, Unique & fun DIY electronics and kits
![PeskyProducts, Tlera Corp Launch Open-Hardware STM32 Firefly Bluetooth Low Energy Dev Board - Hackster.io PeskyProducts, Tlera Corp Launch Open-Hardware STM32 Firefly Bluetooth Low Energy Dev Board - Hackster.io](https://hackster.imgix.net/uploads/attachments/1271089/image_efSu1imGZ4.png?auto=compress%2Cformat)
PeskyProducts, Tlera Corp Launch Open-Hardware STM32 Firefly Bluetooth Low Energy Dev Board - Hackster.io
![a) Circuit diagram of Bluetooth Temperature Sensor Module (BTSM); (b)... | Download Scientific Diagram a) Circuit diagram of Bluetooth Temperature Sensor Module (BTSM); (b)... | Download Scientific Diagram](https://www.researchgate.net/publication/323371244/figure/fig1/AS:597375764664320@1519436889193/a-Circuit-diagram-of-Bluetooth-Temperature-Sensor-Module-BTSM-b-Printed-Circuit.png)