Arduino Uno Wi-Fi Shield Setup and Testing

2017-06-28 03:28:59 by

 

Using the Adafruit Wi-Fi shield with Uno for basic Wi-Fi Connectivity

Setup guide online at https://learn.adafruit.com/adafruit-cc3000-wifi/cc3000-shield

Assembly

You will need to solder on the connector pins to the Wi-Fi shield following the steps below.

Start with some connector pins and place them in the Wi-Fi shield to setup for soldering:

Once you have them soldered you should be able to connect your Arduino to your host PC and run some example code:

Pinouts

The CC3000 is (electrically) fairly simple to use. The module requires an SPI connection, including a clock (CLK), data in from a microcontroller (MOSI) and data out to the microcontroller (MISO). It also uses a chip-select line (CS) for SPI to indicate when a data transfer as started

Along with the SPI interface, there is a power-enable type pin called VBAT_EN which we use to start the module properly and also an IRQ pin, which is the interrupt from the CC3000. The IRQ pin is required to communicate and must be tied to an interrupt-in pin on the Arduino. On the Mega/UNO, we suggest #2 or #3

On the CC3000 shield, we use the following pin connections

  • SCK – #13
  • MISO #12
  • MOSI #11
  • CS for CC3000 #10
  • VBAT_EN #5
  • CS for SD Card #4
  • IRQ #3

From <https://learn.adafruit.com/adafruit-cc3000-wifi/connections>

Make sure your Arduino is powered by a 1 amp or higher rated external power supply when using with the CC3000! Powering an Arduino + CC3000 from a computer/laptop USB port will lead to unstable behavior and lockups because the USB port can’t supply enough power!

From <https://learn.adafruit.com/adafruit-cc3000-wifi/cc3000-library-software>

 

Download the Library

We will start by downloading the Adafruit CC3000 Library, available from our GitHub repository.

From <https://learn.adafruit.com/adafruit-cc3000-wifi/cc3000-library-software>

 

Quick guide to installing third party libraries: https://www.arduino.cc/en/Guide/Libraries

Should now see Sketch examples from Adafruit CC3000 library in Arduino IDE:

 

 

Next run build test to make sure Wi-Fi is working properly:

 

buildtest

The buildtest sketch does a full test of core WiFi connectivity:

It’s a good idea to run this sketch when first setting up the module. It will let you know that everything is working correctly.

Before you run the sketch, edit it to replace the dummy SSID and password with your own:

  1. #define WLAN_SSID       “yourNetwork”        // cannot be longer than 32 characters!
  2. #define WLAN_PASS       “yourPassword”

If you’re using WEP, the password should look like this:

const char WLAN_PASS[] = {0x1A, 0x2B, 0x3C, 0x4D, 0x5E, 0x00};

Since it’s a collection of bytes not ‘passphrase’ style key

Also, make sure that the right wireless security scheme is selected (unsecured, WEP, WPA, or WPA2)

  1. // Security can be WLAN_SEC_UNSEC, WLAN_SEC_WEP, WLAN_SEC_WPA or WLAN_SEC_WPA2
  2. #define WLAN_SECURITY   WLAN_SEC_WPA2

From <https://learn.adafruit.com/adafruit-cc3000-wifi/buildtest>

 

Should get results like below: (edited to remove Wi-Fi network info)

 

Note: make sure your baud rate in serial monitor window is set to same baud rate specified in sketch or else you won’t see the right data

 

**************************************************************************************************

 

Hello, CC3000!

 

RX Buffer : 131 bytes

TX Buffer : 131 bytes

Free RAM: 1165

 

Initialising the CC3000 …

Firmware V. : 1.24

MAC Address : 0x08 0x00 0x28 0x57 0xAD 0xA4

Networks found: 1

================================================

SSID Name    : Test

RSSI         : 65

Security Mode: 3

================================================

 

Deleting old connection profiles

 

Attempting to connect to Test

Connected!

Request DHCP

 

 

IP Addr: 192.168.1.23

Netmask: 255.255.255.0

Gateway: 192.168.6.1

DHCPsrv: 192.168.6.1

DNSserv: 192.168.6.1

www.adafruit.com -> 104.20.38.240

 

Pinging 104.20.38.240…5 replies

Ping successful!

 

 

Closing the connection

 

**************************************************************************************************

 

You can continue testing the rest of the sketch examples provided by Adafruit.

 

 

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