We recently received a kit of sensors, and have started documenting how to use them. The sensor we are working with today is a joystick. This is a 2-axis unit with a push button on the shaft. There are two analog outputs, and one digital for the switch. At rest, the unit reads 512×512, with a 1 on the switch. The joystick can be pushed in all directions, with 0x1023, 0x512, 0x0, 512×0, 1023×512, 1023×1023, and 512×1023 at the extremes. Make sure you have your serial monitor speed set correctly. Please suggest practical projects based on this sensor, and we may build it!
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Sensor Kit
Male to Female Jumper Kit
// Arduino pin numbers
const int SW_pin = 2; // digital pin connected to switch output
const int X_pin = 0; // analog pin connected to X output
const int Y_pin = 1; // analog pin connected to Y output
void setup() {
pinMode(SW_pin, INPUT);
digitalWrite(SW_pin, HIGH);
Serial.begin(115200);
}
void loop() {
Serial.print(digitalRead(SW_pin));
Serial.print(" @ ");
Serial.print(analogRead(X_pin));
Serial.print("x");
Serial.println(analogRead(Y_pin));
delay(10);
}
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Why we need to make digitalWrite(SW_pin, HIGH); as HIGH and initiate at void setup() ?
It was the old method of turning on the pullup resistors. Now we would say "pinMode(SW_pin, INPUT_PULLUP);" and drop the "digitalWrite(SW_pin, HIGH);"