Bluetooth Low Energy (BLE) Pass-through Module Product Overview HM-BT4502B / HM-BT4502B-1 is a wireless data pass-through module based on CMT4502 low-power Bluetooth 5

0 chip

By connecting with MCU, it can quickly realize the connection and data communication between the module and Bluetooth

devices such as smart phones and tablets

MCU takes up less resource and development is simple

Module Features Easy to use without any experience in Bluetooth stack application

User interface uses universal serial port design, full-duplex two-way communication, minimum baud rate support 9600 bps; Default connection interval is 30 millisecond, fast connection; Support 2M symbol transmission; Support 244 bytes packet transmission; Support AT instruction for software reset and get MAC address; Support AT instruction to set Bluetooth connection interval and control different forwarding rates (dynamic power adjustment); Support AT instruction to adjust Tx power, modify advertisement interval, customize advertisement data, customize device identification, set data delay (user MCU serial port reception preparation time), modify serial port baud rate, modify module name

All the above parameters are saved after power-down; Serial port package length can be any length within 240 bytes (including 240 bytes) (automatic distribution of large packages); Support mobile device APP to modify module name, serial baud rate, product identification code, and customize advertisement content and advertisement period

These settings can be saved after power-down

Support mobile device APP to reset module and set Tx power

Support mobile device APP to adjust Bluetooth connection interval

The setting can not to be saved after power down

Support full IO expansion including debugging port; Support anti-hijacking password settings, modification and recovery

Prevent malicious third party connections

Users can also not use them

Advertisement Content prompt the module real-time system status, includi