Bluetooth Modules

HM-BT4502

Bluetooth Module

Bluetooth Low Energy (BLE) Pass-through Module

HM-BT4502 / HM-BT4502A is a wireless data pass-through module based on CMT4502 Bluetooth Low Energy 5.0 chip. By connecting with MCU, it can quickly realize the connection and data communication between the module and Bluetooth devices such as smartphones and tablets. MCU takes up less resource and development is simple.

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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 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, including battery power, custom device identification code (suitable for advertisement application)

Support internal RTC (real-time clock)

Acquired BQB Certification

Acquired FCC/CE/IC/SRRC Certification