1、 Background of the solution
At present, many cars have eliminated physical buttons from the design stage and instead adopted touch screens or voice input methods. This type of design has advantages and disadvantages, but it is not very convenient for car owners who like physical buttons. Therefore, installing a physical button remote control can solve this problem. Vehicles with rear mounted physical buttons can enjoy the various functions of non button vehicles, as well as experience the non visual operation of button vehicles. The installation process does not require wiring or damage to the original structure of the vehicle, and does not affect the vehicle's safety.
2、 Solution Introduction
This scheme adopts Zigbee communication protocol, and the terminal buttons use HY-2340 series modules. The coordinator is an important device connected to the vehicle, and the performance requirements for the coordinator are higher. Therefore, the coordinator uses HY-52P series Zigbee modules. The entire system can connect 200 terminals, fully meeting the button requirements on the vehicle, such as air conditioning switch, temperature adjustment, seat heating, trunk switch, etc.
3、 Solution features
1. Simplify the system structure: Remove complex wiring, reduce system weight and cost.
2. Enhance operational flexibility: In addition to the original operation mode of the vehicle, button operation mode has been added, making vehicle operation more flexible and convenient. Due to the wireless connection of the buttons, installation can be carried out according to the user's habits, and the operation is more in line with the user's habits.
3. Easy replacement: When some buttons are damaged or need to be replaced in appearance, they can be directly purchased and paired for installation and use.
4. Improve safety: Reduce car owners' screen viewing while driving, allowing them to focus more on driving and avoid inaccurate voice recognition in noisy environments. Physical buttons usually provide noticeable tactile feedback when pressed, allowing the driver to immediately confirm whether the operation was successful. This real-time feedback helps reduce misoperations and improve safety during driving.
5. Data encryption: Zigbee 3.0 is used to encrypt and transmit data,Supports AES-256 and SHA2-512 encryption methods， ensuring the security of the data transmission process.
6. Reliability and Durability: The mechanical structure of physical buttons is relatively simple and has undergone waterproof and dustproof treatment, making them less susceptible to environmental factors such as dust and water vapor, making them more durable. Compared to touch screens, physical buttons are less prone to wear and tear or malfunction after prolonged use.
7. Adapt to different users: Physical buttons do not rely on users' visual, auditory, or language abilities, making them more suitable for use by all types of drivers. For drivers with poor vision or hearing impairment, physical buttons provide a more reliable and intuitive way of control.
4、 Solution implementation
This scheme uses the HY-2340 series Zigbee module as the terminal communication module and the HY-52P series Zigbee module as the coordinator module. This combination ensures system reliability while further reducing costs. This solution has been applied on multiple car models, and the button installation is very convenient. It can be pasted at any position on the car, meeting the requirements of different users for button positions.
