TechBitar writes, “This is a utility that shows how to change the settings of the ubiquitous HC-05 Bluetooth module using the AT command set. The HC-05 comes with a rich set of AT commands to perform various tasks such as changing the module’s default settings including changing the pass code, the device name, and the baud rate. But the process of switching the HC-05 into ATcommand mode is not straight forward. I will do my best to illustrate the process in simple to follow steps. You can find the full set of AT commands in the attached datasheet.”
You can find his detailed explanation on Instructables.
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