JDY–31 Bluetooth Module for Arduino

From the shop's description

This bluetooth module is a working alternative for HC-05 or HC-06 at affordable price! JDY-31 Bluetooth is based on Bluetooth 3.0 SPP design, which can support Windows, Linux, for android data transmission, working frequency 2.4GHZ, modulation mode GFSK, maximum transmission power 8db, maximum transmission distance 30 meters, support users to modify device name through AT command The baud rate and other instructions are convenient and quick to use. This Bluetooth module can only be used as a Bluetooth slave. JDY-31 is a classic Bluetooth protocol that can communicate with Bluetooth-enabled computers (desktops, notebooks) and mobile phones (for android). Windows computer Bluetooth serial port transparent transmission For Android Bluetooth serial port transparent transmission Smart home control Automotive ODB testing equipment Bluetooth toy Share mobile power, share weight Medical equipment Parameters: Model: JDY-31 Bluetooth version: Bluetooth 3.0 SPP Working frequency band: 2. 4GHZ Communication interface: UART STM connection temperature: <260 degree Operating voltage: 1.8-3.6V (3.3v recommended) Operating current not connected: 4. 7mA Working temperature: -40~80 degree Current after BLE connection: 7.3mA Antenna: Built-in PCB antenna Transmit power: 8db (Max) High transmission distance: 30 meters Receive sensitivity: -97dbm Master-slave support: slave SPP maximum throughput: 16K bytes/s (for android, windows) JDY-31 support patch and solder pin header Needle pin application: The pin header specification is standard 2.54 pitch pin header, just need to weld 5 pin holes on the module. SMD application: Generally, only four pins of VCC, GND, RXD and TXD need to be connected. If you need to disconnect actively in the connection state, send AT+DISC in the connection state.