It seems straightforward using REST calls to write values to the datastore key, but how does one go about retrieving them?
i.e. it is easy to write a '1' to digital pin 13 using the REST call: http://myArduinoYun.local/arduino/digital/13/1
But how do you go about retrieving this datastore key value elsewhere in the sketch and using it as the condition for an IF statement?
i.e. I want to poll each pin and do some action depending on whether the pin value is '1'.
I have tried Bridge.get() as outlined here: http://arduino.cc/en/Reference/YunGet but this returns a char value which can't be compared in an IF statement. I am surely missing something blatantly obvious here - any suggestions would be greatly appreciated?
char myData[1];
Bridge.get("D13",myData,1);
Serial.println(myData[1]); //currently just gives me a 'V' instead of a number??..
if (myData[1] == 1)
{
Serial.println("success!");
}
No need retrieving values from the data store key via Bridge
Analog pin read:
int analogPin = 3; // potentiometer wiper (middle terminal) connected to analog pin 3
// outside leads to ground and +5V
int val = 0; // variable to store the value read
void setup()
{
Serial.begin(9600); // setup serial
}
void loop()
{
val = analogRead(analogPin); // read the input pin
Serial.println(val); // debug value
}
Digital pin read:
int ledPin = 13; // LED connected to digital pin 13
int inPin = 7; // pushbutton connected to digital pin 7
int val = 0; // variable to store the read value
void setup()
{
pinMode(ledPin, OUTPUT); // sets the digital pin 13 as output
pinMode(inPin, INPUT); // sets the digital pin 7 as input
}
void loop()
{
val = digitalRead(inPin); // read the input pin
digitalWrite(ledPin, val); // sets the LED to the button's value
}