The CAN communication between the main control board (SMT32F407VGT6) and the same server board (STM32F407VGT6) shows that the ambient temperature is below -10 degrees, the communication is abnormal, and the ambient temperature is above -10 degrees! I...

主控板 （SMT32F407VGT6）与同服板 （STM32F407VGT6） 之间的CAN通讯，环境温度低于-10度，通讯不正常，环境温度高过-10度！