This Bluetooth 2.0 Application to connect to a Thermometer via box BT2<->BLE.The first step is to connect to a box Bluetooth 2.0 and Bluetooth Low Energy. The second step is to connect to a Thermometer Bluetooth Low Energy, this indicate the outside temperature. The Thermometer is publish on january 2015 Elektor magazine. The box BT2<->BLE will be soon on Elektor magazine (may be July 2016). Android 4.0 greater necessary.