/*
Joginder
hobbyprojects
05-11-2020 
Wireless_Water_Level_Monitor_Transmitter code

Tested with Library: TMRh20/RF24, https://github.com/TMRh20/RF24/
*/

#include <SPI.h>
#include <RF24.h>

RF24 radio(9, 10);      //CE, CSN

const byte rxAddr[6] = "00001";

int sensor1 = 4;
int sensor2 = 5;
int sensor3 = 6;
int sensor4 = 7;

char level[5];

void setup()
{
radio.begin();
radio.setRetries(3, 5);
radio.openWritingPipe(rxAddr);
radio.stopListening();

pinMode(sensor1,INPUT_PULLUP);   
pinMode(sensor2,INPUT_PULLUP);   
pinMode(sensor3,INPUT_PULLUP);   
pinMode(sensor4,INPUT_PULLUP);  
}

void loop()
{
if(digitalRead(sensor4) == LOW)
level[0] = '4';
else if(digitalRead(sensor3) == LOW)
level[0] = '3';
else if(digitalRead(sensor2) == LOW)
level[0] = '2';
else if(digitalRead(sensor1) == LOW)
level[0] = '1';
else
level[0] = '0';

radio.write(&level, sizeof(level));
  
delay(2000);
}