The A/D module of STM32 is relatively fragile, and the input voltage cannot exceed 3.3V. In order to protect the A/D module, a protection circuit can be added to the A/D input terminal, such as a clam
[align=left][color=rgb(34, 34, 34)][font="]In the microcontroller system, pull-up resistors have gradually become the most stable and reliable main component. [/font][/color][/align][align=left][color
After working on it for several days, I finally got MCD2 working. Now I am posting the information I found a few days ago. I think this is pretty good. ************************************************
In fact, the protocol stack implemented on GPRS DTU is TCP/IP Over PPP. We must have some corresponding concepts when using it. Therefore, we will briefly explain some matters related to the use of SA