// https://wokwi.com/projects/397299219842990081
// PWM 01b: ADW A0 Poti + 10 LEDs + LCD + S0
#include <LiquidCrystal.h>
LiquidCrystal lcd( 12, 13, 15, 16,  17, 18); 
                // RS, E, DB4, DB5, DB6, DB7
int i; long adw0 = 0, adw_alt = -30 ;
unsigned char pwm, g; // 0..255 1 Byte 8 bits groß

#include "DHT.h"
#define DHTPIN 7     
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
DHT dht(DHTPIN, DHTTYPE);

void setup() { // initialize serial interface, LCD + ports:
  Serial.begin( 9600 ) ;
  lcd.begin( 20,4 ) ;
  dht.begin();
	// everything output, except A0 and 0 + 1
  for( i = 2; i <=18 ; i++ )  if( i != 14 ) pinMode(i, OUTPUT); 
  pinMode( A0, INPUT) ; // A0 = pin 14
}

void loop() {  // ADW + ser.interface + LCD-output of Voltage
  adw0 = analogRead( A0 ) ; // 0..5 V => 0..1023 10 Bit-ADW
  
  pwm = adw0 / 4 ; // 0..1023 => 0..255
  g = (adw0 * 100) / 1024 ; 

    
  if( adw0 != adw_alt ) {
    Serial.print( "U/mV = " ) ;
    Serial.print( adw0 * 5000 / 1023 ) ;
    Serial.print( "\t g/% =  " ) ; 
    Serial.println( g ) ;
    adw_alt = adw0 ;
  }
  
  lcd.setCursor(  0,0 );
  lcd.print( "U/mV = " ) ;
  lcd.print( adw0 * 5000 / 1023 ) ; // 0..1023 => 0,0 …5,0
  lcd.print( "     " ) ;
  lcd.setCursor( 0, 1 ) ;
  lcd.print( "g/% = " ) ; 
  lcd.print( g ) ;   lcd.print( "   " ) ;
  // delay( 50 ) ;  // Unsinn, weil PWM bereits alle Timer nutzt
  
  analogWrite( 9, pwm ) ;
  analogWrite( 10, pwm ) ;  analogWrite( 11, 255-pwm ) ;
    // oder: 
  // analogWrite( 10, ~pwm ) ;  analogWrite( 11, pwm ) ;
    // oder: 
  // analogWrite(10, map(pwm,0,255,255,0) );analogWrite( 11, pwm ) ;

  if( adw0 > 511) 
  {
    pwm = map( adw0, 512, 1023, 255,0 ); // gruen
    analogWrite( 6, 255-pwm ) ;  // rot
    analogWrite( 5, pwm ) ;  // gruen
    analogWrite( 3, 0 ) ;  // blau
  }
  else            
  { 
    pwm = map( adw0,   0, 511,  0,255 ); // gruen
    analogWrite( 6, 0 ) ;   // rot
    analogWrite( 5, pwm ) ; // gruen
    analogWrite( 3, 255-pwm ) ; // blau   
  }

  float temp = dht.readTemperature();
  float humi = dht.readHumidity();
  lcd.setCursor(  0,2 );
  lcd.print( "Temp: " ); 
  lcd.print( temp,1 ) ; 
  lcd.write( 223 ); lcd.print( "C   " ); 
  
  // klappte nicht: lcd.setCursor(  0,3 );
  // for( byte i = 0; i<19; i++)  lcd.write( 170+i) ; 
  
  lcd.setCursor(  0,3 );
  lcd.print( "RH/% = " ); 
  lcd.print( humi,1 ) ; 
  lcd.print( "       " ); 
}