Sto provando a realizzare una Arduino Car con BT, per farlo voglio realizzare una applicazione con MIT APP Inventor per realizzare il telecomando...qui sorge il problema, non so come realizzare un tasto che quando viene premuto invia ad Arduino un valore "x" e quando viene lasciato non lo invia più.
//L293 Connection
const int motorA1 = 5; // Pin 2 of L293
const int motorA2 = 6; // Pin 7 of L293
const int motorB1 = 10; // Pin 10 of L293
const int motorB2 = 11; // Pin 14 of L293
//Useful Variables
int i=0;
int j=0;
char state;
int vSpeed=200; // Default speed, from 0 to 255
void setup() {
// Set pins as outputs:
pinMode(motorA1, OUTPUT);
pinMode(motorA2, OUTPUT);
pinMode(motorB1, OUTPUT);
pinMode(motorB2, OUTPUT);
// Initialize serial communication at 9600 bits per second:
Serial.begin(9600);
}
void loop() {
//Save income data to variable 'state'
if(Serial.available() > 0){
state = Serial.read();
Serial.println(state);
Stop();
}
/***********************Forward****************************/
//If state is equal with letter 'A', car will go forward!
if (state == 'A') {
analogWrite(motorA1, vSpeed);
analogWrite(motorA2, vSpeed);
analogWrite(motorB1, vSpeed);
analogWrite(motorB2, vSpeed);
}
/***********************Backward****************************/
//If state is equal with letter 'I', car will go backward
else if (state == 'I') {
analogWrite(motorA1, -vSpeed);
analogWrite(motorA2, -vSpeed);
analogWrite(motorB1, -vSpeed);
analogWrite(motorB2, -vSpeed);
}
/***************************Left*****************************/
//If state is equal with letter 'S', wheels will turn left
else if (state == 'S') {
analogWrite(motorA1, vSpeed);
analogWrite(motorA2, 0);
analogWrite(motorB1, 0);
analogWrite(motorB2, vSpeed);
}
/***************************Right*****************************/
//If state is equal with letter 'D', wheels will turn right
else if (state == 'D') {
analogWrite(motorA1, 0);
analogWrite(motorA2, vSpeed);
analogWrite(motorB1, vSpeed);
analogWrite(motorB2, 0);
}
/************************Bonus*****************************/
/************************Bonus*****************************/
/************************Bonus*****************************/
/**********************Bonus***************************/
/************************Bonus*****************************/
//If state is equal with letter 'S', stop the car
else if (state == 'P'){
analogWrite(motorA1, 0);
analogWrite(motorA2, 0);
analogWrite(motorB1, 0);
analogWrite(motorB2, 0);
}
}
void Stop() {
analogWrite(motorA1, 0);
analogWrite(motorA2, 0);
analogWrite(motorB1, 0);
analogWrite(motorB2, 0);
}
