WiFiStatus

Yún WiFi Status

This sketch runs a script called "pretty-wifi-info.lua" installed on your Yún device in the folder /usr/bin. It prints information about the status of your WiFi connection.

It uses Serial to print, so you need to connect your Yún device to your computer using a USB cable and select the appropriate port from the Port menu before it will run.

Hardware Required

Yún board or shield
wireless network

Circuit

There is no circuit for this example.

image developed using Fritzing. For more circuit examples, see the Fritzing project page

Code

You'll first need to include the Process class :
#include <Process.h>

In setup(), start serial communication, and the Bridge. The sketch won't run until a serial connection is made.

void setup() {
Serial.begin(9600);
while(!Serial);

Serial.println("Starting bridge...\n");
pinMode(13,OUTPUT);
digitalWrite(13, LOW);
Bridge.begin();
digitalWrite(13, HIGH); // Led on pin 13 turns on when the bridge is ready

delay(2000);
}

[Get Code]

In loop(), initialize a new process that will run the WiFi check script. you can run the script by calling runShellCommand() with the path to the script.

void loop() {
Process wifiCheck;
wifiCheck.runShellCommand("/usr/bin/pretty-wifi-info.lua");

[Get Code]

Print out any characters returned by the script to the serial monitor, and wair for a few seconds before running again.

while (wifiCheck.available() > 0) {
char c = wifiCheck.read();
Serial.print(c);
}

Serial.println();

delay(5000);
}

[Get Code]

The complete code is below :

/*
WiFi Status

This sketch runs a script called "pretty-wifi-info.lua"
installed on your Yún in folder /usr/bin.
It prints information about the status of your wifi connection.

It uses Serial to print, so you need to connect your YunShield/Yún to your
computer using a USB cable and select the appropriate port from
the Port menu

created 18 June 2013
By Federico Fissore

This example code is in the public domain.

http://www.arduino.cc/en/Tutorial/YunWiFiStatus

*/

#include <Process.h>

void setup() {
SerialUSB.begin(9600); // initialize serial communication
while (!SerialUSB); // do nothing until the serial monitor is opened

SerialUSB.println("Starting bridge...\n");
pinMode(13, OUTPUT);
digitalWrite(13, LOW);
Bridge.begin(); // make contact with the linux processor
digitalWrite(13, HIGH); // Led on pin 13 turns on when the bridge is ready

delay(2000); // wait 2 seconds
}

void loop() {
Process wifiCheck; // initialize a new process

wifiCheck.runShellCommand("/usr/bin/pretty-wifi-info.lua"); // command you want to run

// while there's any characters coming back from the
// process, print them to the serial monitor:
while (wifiCheck.available() > 0) {
char c = wifiCheck.read();
SerialUSB.print(c);
}

SerialUSB.println();

delay(5000);
}

[Get Code]

Yún WiFi Status

Hardware Required

Circuit

Code

See Also

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