I made a SIM300 GPRS module and encountered the following problem: UDP connection can be connected normally, and data can be sent and received correctly. But TCP connection cannot be made. The operati
[font=宋体]1 Introduction[/font] [font=宋体] At the end of the 20th century, the wave of information revolution that emerged worldwide provided a golden opportunity for the breakthrough development of the
[img]http://bbs.elecfans.com/data/attachment/forum/201304/28/221613rsc27gfjcwfj7c7i.jpg[/img] I need help from an expert. I want to make a microcontroller car.