BotronikS - Final code for all types of Arduino and PC users: -- HOME -- email: botronik@gmail.com
What you need to install or have installed before on your PC: see HERE

LCDP1B: Show 2x Temperature & Humidity on LCD display (2xSensor DHT22)
LCD1=LCD1602 IIC (Default Address: 0x27, 0x3F) --- S1+S2=DHT22
Upload HEX code in Arduino-m328: Here3F