Is there a limit to the length of data sent by ESP8266 transparent transmission mode?

malugu
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Is there a limit to the length of data sent by ESP8266 transparent transmission mode?

Unread post by malugu » Thu Jul 25, 2019 10:14 pm

Problem Description: Use the following AT command to configure ESP8266 as transparent mode:
AT+CIPSTART=XXX
AT+CIPMODE=1
AT+CIPSEND
The transparent transmission mode setting is successful.
In the transparent transmission mode, the protocol data of its own design is sent, and the length of one protocol frame is uncertain. In the sending program, a frame must be sent completely in the send function at one time.
Otherwise, the TCP server considers that the received data is not in the correct format and will be discarded.
But there is such a problem, when the length of the transmitted frame is not too long (probably no more than 100 bytes, not carefully tested), the TCP server can receive data normally, and can
Normal resolution protocol. However, when the length of the transmitted frame is too long (probably more than 100 bytes), the TCP server cannot receive data normally. In the transparent mode of ESP8266,
Is there a limit to the length of data sent at one time? If so, how can I modify it?

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