Two-way Bluetooth Reverse Control Solution for Car and Mobile Phone Screens
This application protocol, developed by our company based on the BC5MM Bluetooth module and an Apple MFi certified chip, is specifically designed for car audio systems. It works in conjunction with Android and Apple MHL or HDMI mobile phone screens to achieve synchronized interaction between the mobile phone screen and the car's infotainment system screen. It includes protocols such as A2DP (music playback), AVRCP (streaming media control and album art transmission), HFP (hands-free calling), SPP (data transfer), PBAPC (phonebook synchronization), HID (mouse), and IAP (data transfer for iOS systems).
The VREG on the module powers on with a high level and powers off with a low level. Upon powering on, it automatically connects to the most recently connected mobile phone. For first-time use, send a command to put the module into pairing mode. Then, search for Bluetooth devices on your phone (the module's default device name is "BC5MP"). Once the device is found, select "Connect." Your phone will prompt you to enter a pairing password (the module's default password is "0000"; phones with Bluetooth 2.1 or later do not require a password). After entering the correct pairing password, your phone will establish a connection with the module. At this point, your phone can play music, download contacts, and make calls through the car audio system (the module includes the latest CSR CVC echo cancellation function). The module communicates with the MCU via a UART interface, allowing the vehicle's MCU to control the Bluetooth module and communicate data. Combined with our provided mobile app, it obtains the phone's resolution and screen orientation to achieve coordinate synchronization and ensure the accuracy of touch functionality.
