User's Manual

User Manual of HC-42 Bluetooth Serial Port Communication Module G
athering information and Carrying Dreams
Website：
http://www.hc01.com
Guangzhou HC Information Technology Co., Ltd
Address: Room 608, No.19, Jiangong Road, Tianhe Science Park, Tianhe District, Guangzhou City, Guangdong Province
Technical customer service QQ: 445253184 Sales hot line: 020-8408-3341
PAGE
6
3. Rapid Testing
3.1 Connection between parameter frame and module
Put the HC-42 Bluetooth module into the HC-USB-P parameter frame, as shown in the figure. The module can be
tested by plugging directly into the USB interface of the PC.
3.2 Communication test
Visit HC’s official website
（
http://www.hc01.com）to download HID serial port helper.
① Connect the module with the computer by using the parameter rack, and select the corresponding module model.
② If you have no idea about the baud rate of the module, press the "module baud rate query" button to query the baud rate
of the current module, with defaults as 9600.
③ Send AT (or click the test command button in the upper right corner of HID software ) and return to OK, which means
that the module works normally.
④ Refer to 5.3 for other AT commands.
4. Development and Application
4.1 Dimensions and Definition of PINS