User Manual

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Espressif Systems
ESP8266
AT Command Examples
3.2.
UDP (remote IP, port can be changed)
•
Create a UDP transmission, last parameter is “2”.
AT+CIPSTART="UDP", "192.168.101.110", 8080, 1112, 2
Response :CONNECT OK
Note :
"192.168.101.110", 8080 here refer to the remote IP and port of UDP transmission terminal which
is created on PC in step 4;
1112 is the local port of ESP8266. User can self-define this port. The value of this port will be random
if it’s not defined beforehand.
2 means the opposite terminal of UDP transmission side will change to be the latest one that has
been communicating with ESP8266.
•
Send data:
AT+CIPSEND=5 // Send 5 bytes
>DGFYQ // enter the data, no CR
Response :SEND OK
Note:
If the number of bytes sent is bigger than the size defined (n), will reply busy, and after sending n
number of bytes, reply SEND OK.
•
If you want to send data to any other UDP terminals, please set the IP and port of this terminal.
AT+CIPSEND=6, ”192.168.101.111”, 1000 // Send 6 bytes
>abcdef // enter the data, no CR
Response :SEND OK
•
Receive data:
+IPD, n: xxxxxxxxxx // received n bytes, data=xxxxxxxxxxx
•
Delete UDP transmission:
AT+CIPCLOSE
Response :CLOSED OK
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