Espressif ESP32 At Instruction Set page 48

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4. Create a UDP transmission between ESP32 and the PC with a fixed remote IP and port.
AT+CIPSTART="UDP","192.168.4.2",1001,2233,0
Response:
OK
5. Enable the transparent transmission mode:
AT+CIPMODE=1
Response:
OK
6. Send data:
AT+CIPSEND
Response:
> // from now on, data received from UART will be transparent transmitted to server
7. Stop sending data:
If a packet of data that contains only +++ is received, the transparent transmission process will be
stopped. Please wait for at least one second before sending the next AT command.
Espressif
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7. AT Commands Examples
2017.02