STM32L475+ESP8266+机智云，OTA时bootloader验证新固件时MD5不通过
本帖最后由 半生少年 于 2023-4-9 20:05 编辑MCU：STM32L475，通过正点原子ESP8266模块连接机智云。温湿度上传和控制开发板LED在机智云APP上都正常。
想实现OTA，参考MCU OTA3.1版本移植，程序下载机智云新固件正常，MD5检验也对的，但重启进入bootloader检验已经下载的固件MD5不一致，升级失败。从最后一个数据包下载，串口打印如下：
Get One Packet!
WiFi2MCU: ff ff 00 c9 1d 6f 00 00 01 62 01 62 00 00 00 00 0f 00 00 00 05 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 09 3d 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20 04 08 00 00 00 00 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 21
**piecenum = 354 , piececount = 354, pieceSize = 192***
MD5 Calculate Success , Will Check The MD5 ..
d0 ef 71 42 d7 ed9 29 7f 23 1e 3e d5 a7 a0 ce
d0 ef 71 42 d7 ed9 29 7f 23 1e 3e d5 a7 a0 ce
（我把SSL和MD5都打印出来了，的确是一样的）
MD5 Check Success ,StorageROM Success , Write Update Flag
System Will Restart... Boot ready to run
Update Task ,Sys Will Load New Sys..Wait For A Moment
Update Size
Check New Sys ...loop = 354
**********************************************************************************************************
MD5 Calculate Success
d0 ef 71 42 d7 ed 9 29 7f 23 1e 3e d5 a7 a0 ce
35 16 ac 3f 41 1d 3 3c c3 ee fd 90 d0 f7 f0 b1
（我还是把SSL和MD5都打印出来了，的确不一样）
Md5_Cacl Check Faild ,MCU OTA Faild
MD5: 35 16 ac 3f 41 1d 03 3c c3 ee fd 90 d0 f7 f0 b1
Check Faild , Go to Old Systerm
Sys Will Load APP.....
这个问题搞了Ｎ天了，恳求大神帮指点指点，谢谢
没有个大神帮忙建议建议吗？多谢啦 MD5不一致检查存储前后数据是不是有所改变或者没存储进去，还有最后不足1k的检验处理情况
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