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5. TCP/IP-Related AT Commands
5.2.6. AT+CIPSENDEX—Sends Data
5.2.7. AT+CIPSENDBUF—Writes Data into the TCP-Send-Buffer
Set
Command
1. Single connection: (
+CIPMUX=0
)
AT+CIPSENDEX=<length>
2. Multiple connections: (
+CIPMUX=1
)
AT+CIPSENDEX=<link ID>,<length>
3. Remote IP and ports can be set in UDP transmission:
AT+CIPSENDEX=[<link ID>,]<length>[,<remote IP>,<remote port>]
Function: to configure the data length in normal transmission mode.
Response
Send data of designated length.
Wrap return > after the Set Command. Begin receiving serial data. When the requirement of data length,
determined by
<length>
, is met, or when
\0
appears in the data, the transmission starts.
If connection cannot be established or gets disconnected during transmission, the system returns:
ERROR
If data are successfully transmitted, the system returns:
SEND OK
Parameters
•
<link ID>
: ID of the connection (0~4), for multiple connections.
•
<length>
: data length, MAX: 2048 bytes.
•
When the requirement of data length, determined by
<length>
, is met, or when
\0
appears, the
transmission of data starts. Go back to the normal command mode and wait for the next AT
command.
•
When sending
\0
, please send it as
\\0
.
Set
Command
1. Single connection: (
+CIPMUX=0
)
AT+CIPSENDBUF=<length>
2. Multiple connections: (
+CIPMUX=1
)
AT+CIPSENDBUF=<link ID>,<length>
Espressif
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2017.05