Hook your sensor up to pin A1/D2 and ground. In the photo above we're testing an analog velostat step sensor as seen in the Firewalker Sneakers. You can also debug a digital sensor like the on/off antics of the vibration switches or tilt ball.
Load this code onto your GEMMA using a regular USB cable:
// GEMMA serial debugging
#include <SoftwareSerial.h>
#define SENSOR_PIN 1 // Analog input for sensor
// Establish software serial on digital pins 0 and 1
SoftwareSerial mySerial = SoftwareSerial(0,1);
int sensorValue; // Current filtered pressure reading
void setup() {
mySerial.begin(9600);
// Set internal pullup resistor for sensor pin (analog 1 is digital 2)
pinMode(2, INPUT_PULLUP);
}
void loop() {
delay(500);
sensorValue = analogRead(SENSOR_PIN);
mySerial.println(sensorValue);
}
Make sure you have the console cable driver installed, then it should show up like a regular serial port in the Arduino serial monitor.
Once you can see your sensor values, you can adjust your program to trigger events at different thresholds!
