WCH Bluetooth Serial Transmission Module CH9141EVT carries out bi-directional transparent transmission through serial interface and Bluetooth, the module supports broadcast mode, host mode and slave mode, and BLE4.2. It supports serial AT configuration and Bluetooth communication configuration in slave mode, and provides GPIO and synchronous GPIO functions. Support 3.3V and 2.5V operating voltage Provide computer side Bluetooth virtual serial port driver Compatible with existing serial port software and tools, no secondary development Support /Linux/Android/iOS and other systems Bluetooth host connection Reach 100 meters at 0dBm TX power Transmit power 8 adjustable Power-down sleep current 0.3uA Support serial port AT configuration and Bluetooth transmission configuration Support broadcast mode, host mode and slave mode Provide GPIO and synchronous GPIO functions, supports Bluetooth reading UART highest communication baud rate 1Mbps UART supports MODEM contact signal , DTR, DCD, RI, , UART supports 5, 6, 7 or 8 data bits and 1 or 2 stop bits UART supports odd, even, no parity, blank 0, flag 1 parity Get chip power supply voltage parameters Color: Green Material: PCB Package Contents: 1 x module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.