Project Description

We will demonstrate the connection to Google web server via HTTP(port 80) and HTTPS(port 443) with WizFi250.

 

<HTTP Client Example>

(AP Association)

AT+WLEAVE

[OK]

AT+WSET=0,Wiznet_Kaizen

[OK]

AT+WSEC=0,OPEN

[OK]

AT+WNET=1

[OK]

AT+WJOIN

Joining : Wiznet_Kaizen

Successfully joined : Wiznet_Kaizen

 

[Link-Up Event]

IP Addr : 192.168.15.10

Gateway : 192.168.15.1

[OK]

 

(This is for easy parsing the data. If you want to parse the header manually, you can omit this step.)

AT+SFORM=000000000

[OK]

 

(Find IP address of google.com)

AT+FDNS=google.com,3000

74.125.128.102

[OK]

 

(Connect to the google web server via HTTP(80))

AT+SCON=O,TCN,74.125.128.102,80,0,0

 

[CONNECT 0]

[OK]

 

(Send Web Request)

AT+SSEND=0,,,18

[0,,,18]

GET / HTTP/1.1\r\n\r\n

[OK]

 

(Now, you can receive the data from google web server via HTTP like below.)

HTTP/1.1 302 Found

Location: http://www.google.co.kr/?gws_rd=cr&ei=pIz0UvbYBqmZiQf2zIDgCA

Cache-Control: private

Content-Type: text/html; charset=UTF-8

Set-Cookie: PREF=ID=55cbe1a26a10a4a4:FF=0:TM=1391758500:LM=1391758500:S=V39C5p8-28xe7gVT; expires=Sun, 07-Feb-2016 07:35:00 GMT; path=/; domain=.google.com

Set-Cookie: NID=67=eAwBBej-W68bRryLLG7O86lG5BkNJzD5GpFZxbUnkHmHs6DyaeocsgLh4yd8mYc5pzyQJxTdC4f7GfqSrbC6orrtgErxRRSC0hxloj6B53eKbRYzWeIv5PGF9UT97v2c; expires=Sat, 09-Aug-2014 07:35:00 GMT; path=/; domain=.google.com; HttpOnly

………………………………

 

(Disconnect the connection with google web server)

AT+SMGMT=ALL

 

[DISCONNECT 0]

[OK]

 

And, below picture is the Wireshark capture of above HTTP example.

 

222

 

<Get HTTPS Example>

 

(By this step, you can refer to the <Get HTTP Example>.)

(Connect to the google web server via HTTPS(443))

AT+SCON=O,TCS,74.125.128.102,443,0,0

 

[CONNECT 0]

[OK]

 

(Send Web Request)

AT+SSEND=0,,,18

[0,,,18]

GET / HTTP/1.1\r\n\r\n

[OK]

 

(Now, you can receive the data from google web server via HTTPS like below.)

HTTP/1.1 302 Found

Location: http://www.google.co.kr/?gws_rd=cr&ei=pIz0UvbYBqmZiQf2zIDgCA

Cache-Control: private

Content-Type: text/html; charset=UTF-8

Set-Cookie: PREF=ID=55cbe1a26a10a4a4:FF=0:TM=1391758500:LM=1391758500:S=V39C5p8-28xe7gVT;

………………………………

 

(Disconnect the connection with google web server)

AT+SMGMT=ALL

 

[DISCONNECT 0]

[OK]

 

And, below picture is the Wireshark capture of above HTTPS example.

333