Local area network OTA firmware upgrading device, method and system
A firmware upgrade and local area network technology, applied in the field of the Internet of Things, can solve problems such as low efficiency, damaged devices, and firmware version burning errors, and achieve the effects of avoiding damage to devices, high efficiency, and simple firmware upgrade operations
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example 1
[0117] Example 1. If the device receives a broadcast message and judges that it needs to be upgraded, it will enter the upgrade download process. At this time, the UDP interaction process on the device side will not reply to the broadcast message. It will wait for the upgrade operation to be completed before sending a reply to the client. Message, if identified as the first reply message.
example 2
[0118] Example 2. If the device receives a broadcast message and judges that it needs to be upgraded, it enters the upgrade download process. After the upgrade is restarted and the power is turned on, the upgrade fails, and the UDP protocol message of the upgrade failure is replied to the client. If it is marked as the second reply message.
example 3
[0119] Example 3. If the device receives the broadcast message, but after checking the current version number of its own firmware and the source version number carried in the broadcast message, it finds that it is not suitable for upgrading, then reply "UDP protocol message for illegal upgrade" to the client , that is, if the device judges that the firmware upgrade is not required, the reply message is identified as the third reply message.
[0120] And in the embodiment of the present invention, in addition to replying to the above three types of messages, it is also considered that the device can also judge whether the received broadcast message is correct. For example: after the device receives the broadcast message, it can use cyclic redundancy Check (Cyclic Redundancy Check, CRC) method to verify whether the broadcast message is correct, CRC is a means of message verification, agreed by the two parties to communicate, to calculate the same algorithm for the character strin...
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