JDY-29 BLE 5.2 Module with Base Plate

Connect the module's base plate pins to the Arduino: VCC to 3.3V, GND to GND, TX to RX (pin 0), and RX to TX (pin 1). Use a logic level converter if your Arduino operates at 5V. Power the Arduino via USB, and the module will enter pairing mode, typically indicated by a blinking LED. You can then communicate via the Serial monitor at the default baud rate, often 9600 or 115200.

The default UART baud rate for many JDY-29 modules is 9600 bps. To change it, you must send specific AT commands via a serial terminal before normal operation. Connect the module to a USB-to-serial adapter, open a terminal at the current baud rate, and send commands like 'AT+BAUD4' for 9600 or 'AT+BAUD7' for 115200. Always consult the specific vendor datasheet for the exact command set, as it can vary.

Yes, the JDY-29 BLE module can pair with smartphones. You need a BLE terminal app on your phone (like 'BLE Scanner' for iOS or 'nRF Connect' for Android) to discover and connect to the module. Once connected, data sent from a microcontroller via the module's UART will be received by the app. For bidirectional control, your microcontroller code must parse data received from the phone's app and sent back over the serial link.

Operating at 3.3V, the JDY-29 has low power consumption typical of BLE 5.2 modules, with average currents in the mA range during transmission and much lower in sleep modes. It is suitable for battery-powered projects. For extended battery life, implement a sleep/wake cycle in your firmware, where the microcontroller powers the module on only when data needs to be sent. Using a low-quiescent LDO regulator or a 3.3V LiPo battery is recommended.