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How to realize remote control of mobile phone through remote switch?

There are the following methods:

1. It is controlled by the command mode of entering the password after the mobile phone is connected.

2. Control by SMS command.

3. Connect 4G, 3G and wifi networks to realize direct access control.

4. Command+access control through mobile APP networking.

1 and 2 methods are simple and have low signal requirements. Suitable for controlling single or multiple switches.

3. The four methods are more complex and need higher signals, but they can be used for a lot of control and management in the cluster.