How Does the L2 Bracelet Work?

The Coding

Receiver Code

L2 Bracelet

//add the following libraries 
#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>

const uint64_t pipe = 0xE8E8F0F0E1LL; //name the radio-wave system 
RF24 radio(9, 10);
int rocket[2];

void setup()
{
  radio.begin(); //Turn on the radio-waves
  radio.openReadingPipe(1, pipe);

//Allow the Rx/Tx to talk to each other
  radio.startListening();

//Start accepting the information from the Tx

Serial.begin(9600);

//Turn on serial monitor 

pinMode (3, OUTPUT); //pin 3 is the light

pinMode (8,OUTPUT); //pin 8 is the buzzer 
}
void loop()
{
  if (radio.available())

//if you are able to pick up the Tx signal 
  {
    radio.read(rocket, sizeof(rocket));

//Then read the array as regular and give no response 
    Serial.print(rocket[0]);
    Serial.println(rocket[1]);

digitalWrite (3,LOW); //Light is off

noTone (8); //Buzzer is off
  }
  else //if the signal is not available 
  {
    Serial.println("No Radio");

delay (50); 

//Write "No Radio" to serial monitor 

//Blink the light 
    digitalWrite (13,HIGH); 
    delay (100);

digitalWrite (13,LOW);

delay (100);
  //Buzz the Buzzer

tone (8, 1000, 200);  
  }
  delay(10);
}

​

Transmitter Code

L2 Bracelet

//Include the following libraries 
#include <SPI.h>
#include <nRF24L01.h> 
#include <RF24.h>
//name the radio- wave systems 
const uint64_t pipe = 0xE8E8F0F0E1LL; 
RF24 radio(9, 10);
int elephant[2];

void setup()
{
  radio.begin(); //Turn on the radio 
  radio.openWritingPipe(pipe); //Turn on the ability for the Tx/Rx to talk to each other 
}
void loop()
{
//make the value of array elephant equal to the value of analogRead     
  elephant[0] = analogRead(A0); 
  //make array elephant equal to 7 
  elephant[1] = 7; 
  //Tell the Rx the size of the array 
  radio.write(elephant, sizeof(elephant)); 
}