2014년 9월 23일 화요일

DIY - WiFi Shield for GR-KURUMI

I tried to make the WiFi Shield for GR-KURUMI.
For GR-KURUMI WiFi shield,  WizFi250 is select as WiFi module which provides UART-to-WiFi and SPI-to-WiFi.
To test simply, FI250 library which is selected UART interface for Host Interface is used as WiFi Library.
Ref. : Comparison of WizFi250 (WiFi Module) Shield / Library in WIZnet and Seeeduino

GR-KURUMI and WizFi250  could be connect to "Serial1": serial1 is UART interfae which is consist TXD(7) and RXD.(8) as below GR-KURUMI Pin map.

[caption id="" align="alignnone" width="910"]GR-KURUMI Pin Map GR-KURUMI Pin Map[/caption]

 

1. Hardware


  • Hardware conntections



























GR-KURUMI



WizFi250



7



TXD:JP2



8



RXD:JP2



GND



GND



VCC



TP2




Follow these steps to connect the actual, is as shown in the following figure.

[caption id="" align="alignnone" width="233"]WiFi Shield for GR-KURUMI 1. prepare GR-KURUMI, WizFi250, WizFi250-EVB, FTDI board, Bread board, Ext. Anttena[/caption]

[caption id="" align="alignnone" width="233"]Wiz250 (WiFi Shield) top for GR-KURUMI 2. connect TP2 to 3.3V in JP5 for 3.3 power input of GR-KURUMI[/caption]

[caption id="" align="alignnone" width="229"]Wiz250 (WiFi Shield) bottom for GR-KURUMI 3. Wiz250 (WiFi Shield) bottom for GR-KURUMI: Connect TXD@JP2 to AD1@JP7 and Connect RXD@JP2 to AD0@JP7[/caption]

[caption id="" align="alignnone" width="230"]Interface board (WiFi Shield) top for GR-KURUMI 4.1 Interface board (WiFi Shield) top for GR-KURUMI[/caption]

[caption id="" align="alignnone" width="223"]Interface board (WiFi Shield) bottom for GR-KURUMI 4.2 Interface board (WiFi Shield) bottom for GR-KURUMI : Red : 3.3V / White : GND / Green : RXD / Yellow : TXD / Blue: WizFi250 RESET[/caption]

[caption id="" align="alignnone" width="224"]GR-KURUMI with Wiz250 (WiFi Shield, Ext. Ant.) 5. Stack up with Wiz250 (WiFi Shield), Interface board and GR-KURUMI[/caption]

2. Software

* Library

I forked Fi250 Library at Fi250 Webpage.
Lib. is modified for GR-KURUMI and added some function.
Lib. is upload at Github : https://github.com/embeddist/Seeeduino_WizFi250

* IDE : IDE for GR 0.4.0

 

3. programming and debugging interface

* programming interface

[caption id="" align="alignnone" width="339"]GR-KURUMI Programming GR-KURUMI Programming[/caption]

* debugging interface : USB Interface (power & USART1)

[caption id="" align="alignnone" width="345"]WizFi250-EVB WizFi250-EVB[/caption]

4. Set Sketch: wizfi250_test.ino

__Before setting wizfi250 example, you should be import the WizFi250 Lib. at IDE for GR. __

#define SSID "STEST"     //Input SSID
#define KEY "87654321" // Input Password
#define AUTH "WPA2"   // Input Encrytion Type

#define wizfi250_rst 9     // Chech and Set wizfi250 hw reset  pin



  1. Demo: Debugging Messages



AT
[OK]
AT+WSET=0,3PA-W //SSID of AP
[OK]
AT+WSEC=0,WPA2,wiznet--- // password
[OK]
AT+WNET=1
[OK]
AT+WJOIN
Already Associated : Station Mode
[OK]
AT+WSTAT
IF/SSID/IP-Addr/Gateway/MAC/TxPower(dBm)/RSSI(-dBm)
STA/3PA-W/192.168.123.136/192.168.123.254/00:08:DC:1C:D8:73/31/33 //DHCP IP  address and Info... from AP
[OK]