Espressif Systems ESP8266EX - 3.1. Instructions on the Use of ESP-LAUNCHER Development Board

To Next Page

To Previous Page

3. Sample Codes

󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧printf("ESP8266󰲧TCP󰲧client󰲧task󰲧>󰲧recv󰲧data󰲧%d󰲧bytes!\nESP8266󰲧TCP󰲧client󰲧task󰲧>󰲧

%s\n",󰲧recbytes,󰲧recv_buf);

󰲧󰲧󰲧󰲧}

󰲧󰲧󰲧󰲧free(recv_buf);

󰲧󰲧󰲧󰲧if󰲧(recbytes󰲧<=󰲧0)󰲧{

󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧close(sta_socket);

󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧󰲧printf("ESP8266󰲧TCP󰲧client󰲧task󰲧>󰲧read󰲧data󰲧fail!\n");

󰲧󰲧󰲧󰲧}

4. Compile the application program, generate ﬁrmware and download it into the ESP8266

module.

5. Power off the module, and change it to operation mode, then power on the module and

run the program.

Result:

ESP8266󰲧TCP󰲧client󰲧task󰲧>󰲧socket󰲧ok!

ESP8266󰲧TCP󰲧client󰲧task󰲧>󰲧connect󰲧ok!

ESP8266󰲧TCP󰲧client󰲧task󰲧>󰲧send󰲧success

ESP8266󰲧TCP󰲧client󰲧task󰲧>󰲧recv󰲧data󰲧17󰲧bytes!

ESP8266󰲧TCP󰲧client󰲧task󰲧>󰲧ESP8266󰲧recv󰲧test

Below is an example showing that the TCP server established at the terminal of network

debugging tool communicates with the ESP8266 successfully.

3.3.3. TCP Server

1. Establish a TCP server, and bind it with the local port.

Espressif

! /!21 37

2017.05

Other manuals for Espressif Systems ESP8266EX