Wifi Shield (Fi250)

Wifi shield （Fi250）is a economic internet solution with Arduino. The Wi-Fi module support IEEE 802.11b/g/n mode, maximum speed up to 65Mbit/s. Wifi shield (Fi250) combine on board antenna; it’s easy to build you project in a small box. The module reserve a UFL connector, you can use an extra antenna to improve the signal range. There is a key on the board, just push one time to change wifi shield as AP mode. The module have a computer interface software, you can control and upgrade the module via USB-UART convertor. The wifi shield contain a Micro SD card socket, it’s like a recorder when wifi shield working as TCP, UDP server.

Specifications

Module	WIZnet FI250
Operating Voltage	5V or 3.3V (Auto select)
Current	300mA (maximum)
Single band	2.4GHz IEEE 802.11b/g/n
Antenna	On board PCB antenna (reserver UFL connector)
Memory	1MB Flash Memory, 128KB SRAM, 1MB Serial Flash
Interface	UART(default)/SPI(upgrade firmware)
Dimensions	69.0x53.5x23.5 mm
Weight

Usage

The demo we use a Arduino Leonardo, we suggest you use a hardware serial port, software is not fast enough to communicate with the Wifi module.

TCP Client

Install Wifi Shield (Fi250) library, download demo code Wizfi250_Client.

/*
//This demo use Arduino Leonardo or Seeeduino Lite. The jumper connect D0-WIFI_TX, D1_WIFI_RX; Let the boot pin not connect
*/
#include <Arduino.h>
#include "WizFi250.h"

#define SSID      "STEST" //Set your SSID
#define KEY       "87654321" //Set your phrase
#define AUTH       "WPA2" // Set the encrypt type 

 
#define  HOST_IP       "192.168.168.185" //Set the TCP Server IP
#define  REMOTE_PORT    9090 //Set the port
#define LOCAL_PORT      1234  //Set the port
 
#define spi_CS  8
 
WizFi250 wizfi250(&Serial1);
boolean returnValue=false;
void setup() {
 
Serial.begin(115200);
Serial1.begin(115200);
while (!Serial);
pinMode(spi_CS,OUTPUT);
Serial.println("--------- WIZFI250 TEST --------");
// wait for initilization of Wizfi250
  delay(1000);
  Serial.println("Join " SSID );
  wizfi250.reset();
  delay(1000);
  wizfi250.sendCommand("AT+WLEAVE\r");
   delay(1000);
   if (!wizfi250.join(SSID, KEY, AUTH)) {
    Serial.println("Failed join " SSID);
     Serial.println("Please Restart");
  } else {
    
  Serial.println("Successfully join " SSID);
  wizfi250.sendCommand("AT+WSTAT\r");
  delay(5);
  char c;
  while(wizfi250.receive((uint8_t *)&c, 1, 100) > 0) {
    Serial.print((char)c);
  }
  delay(2000);  
  returnValue=wizfi250.connect(HOST_IP,REMOTE_PORT,LOCAL_PORT);
  if(returnValue)
   Serial.println("Now you can send data to Server or receive data from Server!");
}
}
void loop() {
  if(wizfi250.available()) {
    Serial.print((char)wizfi250.read());
  }
  if(Serial.available()) {
    wizfi250.print((char)Serial.read());
  }
}

Http Connect

Install Wifi Shield (Fi250) library, download demo code Wizfi250_http.

/*
//This demo use Arduino Leonardo or Seeeduino Lite. The jumper connect D0-WIFI_TX, D1_WIFI_RX; Let the boot pin not connect
*/
#include <Arduino.h>
#include <SoftwareSerial.h>
#include "WizFi250.h"

#define SSID      "STEST"   //Set your SSID
#define KEY       "87654321" //Set your phrase
#define AUTH       "WPA2" //Set the encrypt type

#define TSN_HOST_IP        "74.125.128.103" //google.com server
//#define TSN_HOST_IP        "115.239.210.26" //baidu.com server
//#define TSN_HOST_IP      "192.168.1.254"      // broadcast
#define TSN_REMOTE_PORT    80
#define LOCAL_PORT     9000

#define spi_CS  8

//SoftwareSerial sprintSerial(4,5);   // The software serial port is not stable.
WizFi250 wizfi250(&Serial1);
void setup() {
 
Serial.begin(115200);
Serial1.begin(115200);
while (!Serial);
pinMode(spi_CS,OUTPUT);
digitalWrite(spi_CS,HIGH);
Serial.println("--------- WIZFI250 TEST --------");
// wait for initilization of Wizfi250
  delay(1000);
  Serial.println("Join " SSID );
  delay(10);
  if (!wizfi250.join(SSID, KEY, AUTH)) {
    Serial.println("Failed join " SSID); 
  } else {
    Serial.println("Successfully join  "  SSID);
 
  wizfi250.clear();
  
  wizfi250.connect(TSN_HOST_IP,TSN_REMOTE_PORT,LOCAL_PORT);
  delay(10);
  wizfi250.send("GET / HTTP/1.1\r\n\r\n");
}
   char c; 
   for(int i=0;i<320;i++){
   if (wizfi250.receive((uint8_t *)&c, 1, 100) > 0) {
    Serial.print((char)c);
   }
   } 
}
void loop() {
   while (wizfi250.available()) {
    Serial.write(wizfi250.read());
  }
  while (Serial.available()) {
    wizfi250.write(Serial.read());
}
}

Reset the module

If you need to reset the module as factory default. press the function three times as fast speed. The MODE and WIF LED flash, wait the module reset.
If the module reset as default, the baud rate change to 115200. kindly note that.

One press set AP mode

It's easy to enter AP mode. Press the Function button, wait the WIFI LED change as red. You can scan the wifi signal, WizFi250_AP_*******
Press the wifi shield Fi250 reset button exit AP mode.

Upgrade firmware

The step for upgrade F/W show as below: Connect your wifi shield(Fi250) via UART directly,you can use a UartSBee or other UART tools
Before upgrade your F/W, you may set the module to Program mode (short BOOT jumper pin) wizfi250firmware

1st action

2nd action

3nd action