Personal Weather Station
Sensors: DHT11, UVM-30A and MQ-135 Others: Passive Buzzer, Potentiometer and LCD 16x2 Schematics by Oliver Kuy December 2019
Sensors: DHT11, UVM-30A and MQ-135
Others: Passive Buzzer, Potentiometer and LCD 16x2
Note: Added my latest Sketch which does not match the schematics here but it is a working one. You can just read the code and determine the sensor pinouts and required libraries.
Schematics by Oliver Kuy
December 2019