Webserver using AT Command

[dnk]

I'm having trouble using STM32 to bind to the Webserver via the AT Command command. Connecting to the Webserver is fine, but the problem is that the site only runs a few times, the AT+CIPSEND command has a problem, data sent to ESP is 1 character error causing the data response process to be ERROR. Everyone shows me how to fix it.

This is the problem that I encountered, the webserver run a few times, the AT+CIPSEND sending process is faulty at the letter E. I don't know what the fault is

[Techn]

You are allocating 80bytes for data, Check if the strlen(str) + AT+CIPSEND, \r\n exceed this limit, at the beginning of the function check this and if not, take appropriate action

[Andrew Neil]

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@dnk wrote:

I'm having trouble using STM32 

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before using the STM32, have you verified that you can do it manually - using a terminal?

[Techn]

This is what I got from the reference manual. Are you using ESP8266

<quoted from the AT_cmd for ESP 8266>

20ms interval between each packet, maximum 2048 bytes per packet. When
single packet containing "+++" is received, it returns to normal command
mode. Please wait at least 1 second before sending next AT command

For network traffic, do not expect that you will be successful always, so check for other conditions and take appropriate action..

<quoted>

If connection cannot be established or gets disconnected during send,
returns
ERROR
If data is transmitted successfully, returns
SEND OK