Descritpion: JDY-33 is a classic Bluetooth + BLE dual-mode Bluetooth module, can communicate with Bluetooth-enabled computers (desktop, notebook), mobile, IOS. It can be applied to Bluetooth POS machine, Thermal printer, Smart home control, Automotive ODB testing equipment, Bluetooth various transparent product applications, Sharing charging treasure, sharing weight scale etc. DY-33 general application only needs to connect 4 pins of VCC, GND, RXD, TXD, such as in the connection state. Disconnect, send AT+DISC\r\n, and send deep sleep to AT+SLEEP\r\n when not connected. After deep sleep, you can wake up by the falling edge of the EN pin, or you can wake up the data through the serial port. Use the serial port to send AT+VERSION\r\n command to wake up. When connected with android and computer Bluetooth, the communication speed can reach 16k byte per second, and no packet loss (supports serial port to continuously send and receive data). Parameters: Model name: JDY-33 Working frequency: 2.4GHZ Communication Interface:UART Operating Voltage:1.8-3.6V Antenna: Built-in PCB antenna Transmission distance:30M Master-slave support: Slave Module size: 26x13x1.7 mm (length, width, height) Bluetooth version:Bluetooth 3.0 SPP + BLE4.2 SMT soldering temperature:<260° Working current:6.5mA Deep sleep current:<10uA Transmit power: 6db(maximum) Receiving sensitivity: -96dbm Package included: 2 x JDY-33 Bluetooth Module (PIN or SMD optional, you will get two SAME, not mixed types)It supports 38400 baud rate continuous data transmission, higher than 38400 baud rate can not be sent continuously. BLE and IOS or Android connection communication speed can be up to 4K per second. SPP maximum throughput can be up to 16K bytes/s(Android/Windows). JDY-33 Bluetooth Module SPP3.0+BLE4.2 Dual Mode SPP SPP-C Bluetooth.