User Manual

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Espressif Systems

ESP8266

AT Command Examples

4. Transparent Transmission

Transparent transmission is enabled only when ESP8266 is working as TCP client creating a single

connection, or in UDP transmission.

4.1.

TCP client single connection UART - WiFi passthrough

Here is an example that ESP8266 station as TCP client to create a single connection and execute

transparent transmission. For ESP8266 soft-AP, it can execute transparent transmission in the similar

way. For more information about AT commands, please refer to documentation “ 4A-ESP8266__AT

Instruction Set ”.

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Set WiFi mode :

AT+CWMODE=3 // softAP+station mode

Response :OK

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Connect to router:

AT+CWJAP="SSID", "password" // SSID and password of router

Response :OK

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Query device’s IP:

AT+CIFSR

Response :192.168.101.105 // Device’s IP that got from router.

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Connect PC to the same router that ESP8266 is connected to.

Using a network tool on the computer to create a server.

Espressif Systems Conﬁdential  / Friday, Oct 23, 201510 16