next topic »

[on:]

Good day,

I'm currently trying to build a wireless twitter display using an arduino, wifly shield and LCD.

I already have a code that works for the ethernet portion but i'm trying to make my project wireless.

Could someone give me a hint to what i might need to alter to get it running?

I'm using an Arduino 1.0 IDE running this version of the library: https://github.com/jmr13031/WiFly-Shield

I have only connected Tx and Rx pin to Arduino pin 2 and 3 respectively. and Vin from arduino to 3.3v and Gnd to Gnd.

Is that right?

this is my code that i used. appreciate the advice!

Code:

#include <SPI.h>
#include <Ethernet.h>
#include <TextFinder.h>
#include <LiquidCrystal.h>
#include "WiFly.h"

//WIFLY CONFIG---------------------------
//char passphrase[] = "WIFI_PASSWORD";
//char ssid[] = "WIFI_NAME";
//---------------------------------------

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(9,8,7,6,5,4);

byte mac[] = {0xA2, 0xB1, 0x9A, 0xD2, 0xB3, 0xC5}; //mac address

byte ip[] = {192,168,X,XX};

byte server[] = {128,242,240,20}; // Twitter
char serverName[] = "api.twitter.com";  // twitter URL
char tweet[140];

Client client;

TextFinder  finder(client);

void setup()
{
  WiFly.begin(mac,ip);
}

void loop()
  {
 // call XML data from twitter(working)
  }

[Reply #1 on:]

I have only connected Tx and Rx pin to Arduino pin 2 and 3 respectively. and Vin from arduino to 3.3v and Gnd to Gnd.

Do you really have a WiFly shield (with the RN-131C)? These use an SPI2UART chip and don't have RX/TX pins. The software is also communicating over the SPI bus and not the USART of the Arduino.

[Reply #2 on:]

yup i do! but it says on the pin side there are Tx and Rx pins for me to connect. in that case, what would be a suitable board for me to use to enable wireless connectivity instead of ethernet?

cheers mate!

[Reply #3 on:]

sorry pylon i realized there are two board out there. mine is this board. https://www.sparkfun.com/products/9954

cheers!

[Reply #4 on:]

There is a TwitterClient example in the Ethernet library coming with Arduino 1.0, very easy do adapt to your WiFly shield (WiFly library was adapted after the Ethernet library).

[Reply #5 on:]

thanks florinc,

got my wifly connected to arduino pin for pin and now i'm running and it gets stuck on WiFly.begin();

any ideas?

[Reply #6 on:]

just a question for florinc and pylon,

I noticed there are two different shields, one is a WiFly shield and the other is the original Arduino WiFi shield.

what is the difference? are both just plug and play? will it be better if i got the Arduino wifi shield for my arduino itself?

[Reply #7 on:]

got my wifly connected to arduino pin for pin and now i'm running and it gets stuck on WiFly.begin();

Did you specify the correct credentials (ssid, password) for your wifi network?
Are you currently using the sparkfun wifly shield?

[Reply #8 on:]

Yup using sparkfun's wifly shield. It communicates thru uart am i right?

[Reply #9 on:]

If this is the WiFly shield you have
https://www.sparkfun.com/products/9954
then it uses SPI.

[Reply #10 on:]

sorry pylon i realized there are two board out there. mine is this board. https://www.sparkfun.com/products/9954

As I told you: this board is using the SPI bus to communicate with the Arduino. The communication with the WiFi module is through a UART interface because on the shield Sparkfun integrated a SPI2UART chip.

How do you connect the shield to the Arduino? Stacking it on? Can you post a picture of it?