1. Directly connect to the external network IP according to the official document tutorial. After trying countless times, the connection failed.
Solution : Use intranet penetration software, such as Peanut Shell, which is very easy to use and free. For specific tutorials, see the following post:
https://blog.csdn.net/Emb_2333/article/details/104039102
What needs to be noted is :
1. The IP address and port of the AT+CIPSTART command are mapped to the IP address and port of the external network, which is the second one in the figure below.
The above picture is a reference to the following post, not my own IP
to add the link description.
2. The above operations are basically no problem. The difficulty is the setting of the port number. I have been stuck on this problem for a long time.
The so-called port number means that each application in the server will correspond to a port number. The client accesses the services provided by the server through IP and port number.
Therefore, the port number is created by the server and can be set at will, as long as the port number is not occupied. You can use the network debugging assistant to create the port number. 12345 is the port number you created.
With the port number, and then based on this port number, the second step is to establish intranet penetration. The port number is set to "12345".
Note : You must first create the port number with the network debugging assistant, and then Before performing intranet penetration
