Keyestudio 4DOF Manual page 202

Project 4: Bluetooth Controlled Robot Arm
1) Principle of Bluetooth Control
Description:
Bluetooth, as the name implies, blue teeth, and he is not used to bite people, but a wireless data transmission
method. Bluetooth technology is a wireless standard technology that enables short-range data exchange among
fixed devices, mobile devices, and personal area networks of buildings (UHF radio waves in the ISM band of 2.4 to
2.485 GHz).
There are two kinds of commonly used Bluetooth module on the market, HC-05 and HC-06 models.
The difference between them is that the HC-05 is a master-slave one. It can not only make small reports to its own
"master", but also can receive the command given to it. The
HC-06 can only work in slave mode, which can only accept the
superior command. For instance, in many cases you may want
to be an overbearing man, letting subordinates obey the order
without any nonsense. In such situation, it is enough to use
199