The JY-MCU Bluetooth Serial Port module defaults to 9600 or 38400 baud depending on the firmware loaded on it. If you’ve ever dealt with an early dialup modem, you’ll feel right at home as this is done by sending AT commands to the module.
Step 1 : Establish a serial connection to the USB-to-Serial module
Please connect the module follow this schematic.
Step 2: Install Android Software
– download this file serialExample.apk
– upload it into your android device.
– install the serialExample.apk
Step 3. Follow the instruction in this video.