The App is used to configure the Bluetooth V4. x BLE UART, RS232, RS422 or RS485 serial port converter. Serial port setting: 1. Baud Rate: Supports 1.2/2.4/4.8/9.6/19.2/38.4/57.6/115.2/230.4/460.8/921.6 Kbps2. Parity: none/even/odd3. Stop bit: 1/1.5/24. Data bit: 7/85. TxD, RxD, GND, CTS/RTSCentral & Peripheral setting: 1. Scan the BLE devices2. Choose the one to be the central role3. Submit the Mac. address and the device will become the central4. The central will connect the peripheral device automatically5. The device will be reset to default if need to connect other peripheral deviceApplications: PDA, POS, Smartphone- Receipt printer- Bar code reader, RFID reader, IC card reader, MSR card reader- PLC, CNC machine- Robot, UAV- SCADA, data collectorRemark: The APP is used for testing only. If you need the customized design, please contact.