I wanted to find a way to call my kids, with me sitting on ground floor and them, sitting on the top floor of the house.
2 arduino, one acting as transmitter, one acting as receiver and here we go : they would not ignore me anymore 🙂
Lets start the transmitter (schema and code) : it has a push button to send the signal and a led to indicate it is transmitting.
#include
const int led_pin = 11;
//const int transmit_pin = 4;
//const int transmit_en_pin = 3;
const int transmit_pin = 3;
//const int transmit_en_pin = 3;
const int buttonPin=2;
void setup()
{
pinMode(buttonPin, INPUT); // sets the digital pin as output
pinMode(led_pin, OUTPUT); // sets the digital pin as output
delay(1000);
Serial.begin(9600); // Debugging only
Serial.println("setup");
// Initialise the IO and ISR
vw_set_tx_pin(transmit_pin);
//vw_set_rx_pin(receive_pin);
//vw_set_ptt_pin(transmit_en_pin);
//vw_set_ptt_inverted(true); // Required for DR3100
vw_set_ptt_inverted(false);
vw_setup(2400); // Bits per sec
}
byte count = 1;
void loop()
{
int reading = digitalRead(buttonPin);
if(reading==HIGH) {
//
digitalWrite(led_pin, HIGH); // Flash a light to show transmitting
char msg[7] = {'h','e','l','l','o',' ','#'};
//msg[5]=count;
vw_send((uint8_t *)msg, strlen(msg)+1);
vw_wait_tx(); // Wait until the whole message is gone
Serial.println(count);
count = count + 1;
delay(500);
digitalWrite(led_pin, LOW);
}
}
Next comes the receiver : it has a buzzer playing a small melody and a led blinking to indicate it is receiving.
#include
#include
const int led_pin = 8;
const int receive_pin = 3; //2
const int buzzer=11;
// tableau de mémorisation des notes de la mélodie
int melody[] = { NOTE_C4, NOTE_G3,NOTE_G3, NOTE_A3, NOTE_G3,0, NOTE_B3, NOTE_C4};
// tableau de mémorisation de la durée des notes : 4 = noire, 8 = croche, etc.:
int noteDurations[] = {4, 8, 8, 4,4,4,4,4 };
void play(){
// boucle pour parcourir les notes de la mélodie
for (int thisNote = 0; thisNote < 8; thisNote++) { // thisNote de 0 à 7
// pour calculer la durée de la note, on divise 1 seconde par le type de la note
//ainsi noire = 1000 / 4 sec, croche = 1000/8 sec, etc...
int noteDuration = 1000/noteDurations[thisNote];
// joue la note sur la broche x pendant la durée voulue
tone(buzzer, melody[thisNote],noteDuration);
// pour distinguer les notes, laisser une pause entre elles
// la durée de la note + 30% fonctionne bien :
int pauseBetweenNotes = noteDuration * 1.30;
delay(pauseBetweenNotes); // delai entre les notes
// stoppe la production de son sur la broche 8 :
noTone(buzzer);
}
}
void setup()
{
pinMode(led_pin, OUTPUT); // sets the digital pin as output
pinMode(buzzer, OUTPUT); // sets the digital pin as output
delay(1000);
Serial.begin(9600); // Debugging only
Serial.println("setup");
// Initialise the IO and ISR
//vw_set_tx_pin(transmit_pin);
vw_set_rx_pin(receive_pin);
//vw_set_ptt_pin(transmit_en_pin);
//vw_set_ptt_inverted(true); // Required for DR3100
vw_set_ptt_inverted(false);
vw_setup(2400); // Bits per sec
vw_rx_start(); // Start the receiver PLL running
}
void loop()
{
uint8_t buf[VW_MAX_MESSAGE_LEN];
uint8_t buflen = VW_MAX_MESSAGE_LEN;
if (vw_get_message(buf, &buflen)) // Non-blocking
{
int i;
// Message with a good checksum received, print it.
Serial.print("Got: ");
for (i = 0; i < buflen; i++)
{
Serial.print(buf[i], HEX);
Serial.print(' ');
}
Serial.print(' ');
for (i = 0; i < buflen; i++)
{
Serial.print(char(buf[i]));
Serial.print(' ');
}
Serial.println();
digitalWrite(led_pin, HIGH);delay(1500);digitalWrite(led_pin, LOW);delay(1500);
digitalWrite(led_pin, HIGH);delay(1500);digitalWrite(led_pin, LOW);delay(1500);
play();
}
}
Voila !
.
