The BM-70-CDB is a compact demo board that provides rapid prototyping and developing for Bluetooth data applications for Bluetooth Low Energy. It can be powered via USB host or through the battery. The BM-70-CDB uses the BM70, a fully certified Bluetooth 5.0 Low Energy module. The BM-70-CDB provides a USB-UART converter allowing flexible interface to a host PC, a PC terminal utility and smartphone apps to drive both BLE serial data connections and custom BLE services.