The commonly used frequency of radio remote control is 433mHz or 315mHz, also referred to as 433 remote control and 315 remote control. The wireless remote control uses the open frequency band stipulated by the state. If it does not exceed the scope of this unit, it can be used freely without the approval of the "Radio Management Committee".
My country's open frequency band is specified as 315mHz, while Europe and the United States and other countries specify 433mHz, so products exported to the above countries should use 433mHz remote control; there are three types of coding methods commonly used in radio remote control, namely fixed code, learning code and rolling code. The learning code and the rolling code are upgraded products of the fixed code. The rolling code remote control is currently the most secure. At present, the rolling code method is used in all occasions with high confidentiality requirements.
