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Servo button example
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| #include <Servo.h> | |
| // Declear the servo | |
| Servo myservo; | |
| // Declear pins | |
| const int buttonPin = 2; | |
| const int servoPin = 13; | |
| // Declear variables | |
| int lastButtonState = LOW; | |
| int bottonState = LOW; | |
| // use in control flow | |
| int mode = 0; // current mode | |
| int angle = 0; //current angle | |
| bool forward = true; // turning direction | |
| // Setup function | |
| void setup() { | |
| // initialize the pin | |
| pinMode(servoPin, OUTPUT); | |
| pinMode(buttonPin, INPUT); | |
| // attach to servo | |
| myservo.attach(servoPin); | |
| } | |
| // the loop routine runs over and over again forever: | |
| void loop() { | |
| // read the button state from pin | |
| bottonState = digitalRead(buttonPin); | |
| // check if button change state for sure | |
| if (bottonState == HIGH && lastButtonState == LOW) { | |
| // change mode | |
| if (mode <= 2) { | |
| mode++; | |
| } else { | |
| // if mode is over 3, reset it. | |
| mode = 0; | |
| } | |
| // make sure button works by putting delay to make sure it did not repeated | |
| delay(30); | |
| } | |
| // make sure to change the last button state | |
| lastButtonState = bottonState; | |
| // start running the mode | |
| switch (mode) { | |
| case 0: // reset to 0 angle | |
| angle = 0; | |
| break; | |
| case 1: // set to 90 angle | |
| angle = 90; | |
| break; | |
| case 2: //moving forward and backward by 10 | |
| if (forward == true) { | |
| angle+=10; | |
| } else { | |
| angle-=10; | |
| } | |
| delay(30); // slow it down, it might go crazy without it. | |
| break; | |
| case 3: //moving forward and backward by 30 | |
| if (forward == true) { | |
| angle+=30; | |
| } else { | |
| angle-=30; | |
| } | |
| delay(30); // same | |
| break; | |
| } | |
| // vilidating the angle, make sure it goes between 0 and 180 | |
| if (angle >= 180) { | |
| angle = 180; | |
| forward = false; | |
| } | |
| if (angle <= 0) { | |
| angle = 0; | |
| forward = true; | |
| } | |
| // Final result goes to the servo | |
| myservo.write(angle); | |
| } |
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