Arduino Analog RF Receiver Voltage Data LCD 315 433MHz

analog-rf.ino

/*

Code by Tom Igoe with voltage/LCD sections by p1nesap. Watch on YouTube: 
https://www.youtube.com/watch?v=MlS9Arac9jM

 */


 #include <Wire.h>
 #include <LiquidCrystal_I2C.h>

const int analogInPin = A0;  // RF receiver
const int analogOutPin = 9; // 8 ohm speaker with 100 ohm resistor

int sensorValue = 0;      
int outputValue = 0;       
int voltValue = 0;


LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);  // Set the LCD I2C address

void setup() {
  
  Serial.begin(9600);
  lcd.begin(16,2);
}

void loop() {
  // read the analog in value:
  sensorValue = analogRead(analogInPin);
// convert raw data to voltage:
  float voltValue = sensorValue * .0049;
  outputValue = voltValue;
  // change the analog out value:
  analogWrite(analogOutPin, outputValue);

  // print raw data to serial:
  Serial.print("sensor = ");
  Serial.print(sensorValue);
  Serial.print("\t output = ");
  Serial.println(outputValue);
  
  //print RF voltage to LCD:

  lcd.setCursor(0, 0);
  lcd.print("RF voltage: ");
  lcd.print(voltValue, 3);

  delay(300);
  lcd.clear();
}