// The ES6937 Motion Sensing Swivel Disc - Getting Started...
// We're going to use the serial plotter as an oscilloscope so that we can view the motion sensor waveform.  Open the serial plotter as soon as you open the code.

// CONNECTIONS:  
//AD3 is ground  
//AD1 is 5v
//AD2 is PIR
// The on-board LED is what we're going to use to see when the motion sensor output has become stable.  No need to connect an external LED =)
// The PCB connector pins are labelled AD1, AD2, and AD3.
int hold = 0;   // This integer will hold our Analog-to-digital data when sampling the motion sensor output


void setup() {      // Let's set things up
Serial.begin(9600); // Start serial comms so that we can use the serial plotter or serial monitor
pinMode(A3,OUTPUT); // Set analog pin#3 as an output.  This will be set to LOW, and act as an artificial ground
pinMode(A1,OUTPUT); // Set analog pin#1 as an output.  This will be set to HIGH, and act as a power supply to the disc.  The disc takes very little power to operate.
digitalWrite(A3,LOW); // Greate the artificial ground by setting A3 LOW
delay(1);             // This 1ms delay is optional.
digitalWrite(A1,HIGH);// Set A1 to high to apply 5v to the disc
delay(1000);
} // Doneski!


void loop() {   // We're going to use the serial plotter as an oscilloscope so that we can view the motion sensor waveform.  Open the serial plotter as soon as you open the code.
 hold = analogRead(A2); // Sample the disc output and place the analog output value (0-1023) into hold. 1023 being 5v, 0 being 0v, and any value in between.
 Serial.println(hold);  // Send the value to the serial monitor/plotter. 
 delay(10);             // Sample every 10ms. 
}

// Notes:
// Note the last line of code - delay(10); - This is the delay between each sample.  For highest resolution, get rid of this delay all together.  Make it longer for a loser resolution.
// Seriously.  Play with this delay to see how it changes the waveform on the serial plotter!