Arduino WIFI shield

Introduction

The Wifi Shield is based on Serial to Wi-Fi module Wizfi210 from Wiznet and compatible with Arduino and its clones. The Wifi Shield offers you a quick, easy, and effective way to add Wi-Fi capabilities to Arduino. The Wifi Shield allows you to achieve Wifi communication via UART by sending AT commands, which is an ideal solution for whom with limited or no Wi-Fi or RF expertise. The Shield supports data rates up to 11 Mbps, and is compliant with 802.11b.

Features

• Serial(UART) to Wifi.
• Simple AT commands for configuration and data communication.
• DHCP/Static IP, TCP/UDP, Server/Client, DNS.
• Operates with standard 802.11 b/g/n access points at speed up to 11 Mbps (802.11b).
• 802.11i Security (WEP, WPA, WPA2-PSK, Enterprise).
• High-throughput hardware AES and RC4 encryption/decryption engines.
• Limited AP Feature (Direct Connection to iPhone, iPad and Android-Phone without AP).
• Ultra low power consumption through dynamic power management.

Specifications

• Wifi Chip: WizFi210
• Radio Protocol: IEEE 802.11b/g/n Compatible
• Supported Data Rates: 11, 5.5, 2, 1 Mbps (IEEE 802.11b)
• Modulation: DSSS and CCK
• RF Operating Frequency: 2.4 - 2.497 GHz
• Antenna Options: Chip antenna and U.FL connector for external antenna
• Networking Protocols: UDP, TCP/IP (IPv4), DHCP, ARP, DNS, HTTP/HTTPS Client and Server(*)
• Power Consumption(Typical): Standby = 34.0 µA Receive = 125.0 mA Transmit = 135.0 mA
• RF Output Power (Typical): 8dBm ± 1dBm
• Security Protocols: WEP, WPA/WPA2–PSK, Enterprise, EAP-FAST, EAP-TLS, EAP-TTLS, PEAP
• I/O Interface: UART, SPI(*), I2C(*), WAKE, ALARM, GPIOs
• System Working Voltage: 3.3V

Indicator LEDs

There are four indicator LEDs(PWR(Green), D2(Blue), D1(Red), D4(Yellow)) on the Wifi Shield, users can know about the working phase of the shield based on the four indicator LEDs. Detailed information please refer to the following table:

LEDs(color）	Status	Description
PWR(Green)	ON	Power of the Wifi Shield is on
	OFF	Power of the Wifi Shield is off
D1(Red) (GPIO30) (Serial_RXD)	Blink(-1-)	Serial Data Rx (Data Mode)
	Blink(-1-1-)	Serial Data Rx (AT Command Mode)
D2(Blue) (GPIO31) (Serial_CONN)	ON	Serial-To-WiFi is OK
	OFF	Serial-To-WiFi is error
D4(Yellow) (GPIO28) (Wifi_CONN)	ON	Associated
	OFF	Not Associated

Status	PWR	D1(GPIO30)	D2(GPIO31)	D4(GPIO28)
ON	(on board 5v)Power On	-	Serial-To-WiFi OK	Associated
Blink(-1-)	-	Serial Data Rx (Data Mode)		-
Blink(-1-1-)	-	Serial Data Rx (AT Command Mode)	-	-
OFF	(on board 5v)Power Off	-	Serial-To-WiFi Error	Not Associated