1. Upgrade trigger mechanism
The first step of Smart Washing Machine Main And Secondary Boards software upgrade is upgrade trigger. This can be achieved in many ways. One common one is automatic detection trigger. The program in Smart Washing Machine Main And Secondary Boards will automatically connect to the manufacturer's server regularly (for example, every once in a while) to check whether there is a new software version. In this process, the main and secondary boards send a request containing information such as the washing machine model and the current software version number through the built-in network module (such as Wi-Fi chip). After receiving the request, the server compares the latest version information in the database. If there is an updated version, it sends an upgrade prompt signal to Smart Washing Machine Main And Secondary Boards. In addition, users can also trigger the upgrade manually. There may be a button such as "Check for Updates" on the operating panel of the washing machine. After the user presses it, Smart Washing Machine Main And Secondary Boards will also initiate a query request to the server to start the upgrade process.
2. Upgrade file download
When it is determined that there is an available upgrade version, the download of the upgrade file begins. Smart Washing Machine Main And Secondary Boards will establish a stable connection channel with the server, which must ensure the accuracy and integrity of data transmission. For larger upgrade files, the method of segmented download and verification is usually adopted. For example, the upgrade file is divided into several data blocks, and each data block is verified once (such as through CRC verification, etc.), and if the verification fails, the data block is downloaded again. At the same time, in order to cope with the situation of unstable network, the download process must have a breakpoint resume function. When downloading, Smart Washing Machine Main And Secondary Boards also needs sufficient temporary storage space to store the downloaded files. These storage spaces can be specific cache areas on the main and secondary boards or part of the space shared with the washing machine storage system.
3. Upgrade file installation
After the download is complete, the upgrade file installation phase begins. First, the main and secondary boards will verify the integrity and legitimacy of the downloaded upgrade files. This includes checking the digital signature of the file (the manufacturer uses the private key to sign the file, and Smart Washing Machine Main And Secondary Boards uses the corresponding public key to verify), ensuring that the file has not been tampered with and is an official upgrade file. Then, the main and secondary boards will operate according to the installation script in the file. Generally, the secondary board is upgraded first. During the upgrade of the secondary board, the main board will closely monitor the status of the secondary board and exchange data through the communication link between the main and secondary boards (such as I2C and other communication protocols). After the secondary board is successfully upgraded, it will feedback information to the main board, and the main board will start its own upgrade process. During the entire installation process, it is necessary to ensure that the order of each step is correct and the execution results of each step are checked. If an error occurs, there must be a corresponding rollback mechanism to restore to the state before the upgrade.
4. Verification and feedback after the upgrade
After the upgrade is completed, the software of Smart Washing Machine Main And Secondary Boards needs to be verified. Smart Washing Machine Main And Secondary Boards will restart and perform a series of self-test operations. For example, check whether each sensor is working properly, whether the control of the actuators such as motors is accurate, and whether the interaction with the operation panel is smooth. At the same time, the main and secondary boards will send feedback information on the completion of the upgrade to the server, including whether the upgrade is successful and whether there are any problems. If a problem is found during the verification process, the washing machine may display a corresponding error code, prompting the user to contact after-sales service, or automatically try to upgrade again or perform some simple repair operations to ensure that the washing machine can run the new software version normally.
