The App is used to configure the Bluetooth V4.x & V5.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 Kbps (BLE V4.x); 1.2/2.4/4.8/9.6/19.2/38.4/57.6/115.2/230.4 Kbps (BLE V5.x) 2. Parity: none/even/odd (BLE V4.x), none/even (BLE V5.x) 3. Stop bit: 1/1.5/2 (BLE V4.x); 1 (BLE V5.x) 4. Data bit: 7/8 (BLE V4.x); 8 (BLE V5.x) 5. TxD, RxD, GND, CTS/RTS (BLE V4.x & V5.x) Central & Peripheral setting: 1. Scan the BLE devices 2. Choose the one to be the central role 3. Submit the Mac. address and the device will become the central 4. The central will connect the peripheral device automatically 5. The device will be reset to default if need to connect other peripheral device Applications: - PDA, POS, Smartphone - Receipt printer - Bar code reader, RFID reader, IC card reader, MSR card reader - PLC, CNC machine - Robot, UAV - SCADA, data collector Remark: The APP is used for testing only. If you need the customized design, please contact.