Check out my previous posts on WIFI ESP8266 1.AT COMMANDS  ,  2. TCP CLIENT/SERVER

In this post we shall see how to connect ESP module with an ANDROID Mobile device & communicate.

On ESP side following are the AT commands to configure :

AT+CWLAP   –  Lists all surrounding Access Points

AT+CWJAP = “SSID”,”password”     – Join with your preferred AP

AT+CWMODE=1       ESP on STATION Mode

AT+CIPMUX=1     Allow multiple connections

AT+CIPSERVER=1,80   start the SERVER on port 80

AT+CIFSR    to get the STATION IP Address

 

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On your Android Mobile open SETTINGS & switch ON WI FI

 

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Surrounding Access Points will be listed automatically.Select the one to which the ESP module has joined already.Here it is MBLAZE , which is a secured one.

 

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Open the preferred WIFI access point & connect to it by providing the Password.

 

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Now , my Mobile has connected to the Access point where ESP is already connected with.

 

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From the Market , install a TELNET client on your Mobile

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Open the TELNET Client

TELNET waits to get the Local Host IP & the Port number.

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Enter the IP as 192.168.1.2 & Port as 80  .

This IP is the one we got from AT+CIFSR previously & we’ve started a Server on port 80 already with ESP.

Touch on Connect to Server

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Now the TELNET Client is connected to the ESP server on port 80.

Type in some characters & touch Enter

 

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The characters are received by the ESP Module

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To send data to TELNET ,use the AT command

AT+CIPSEND=0,15

This command is to send 15 characters on channel 0

 

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The message is received by the TELNET screen.

 

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