Using Arduino DHT22 and BMP180 sensors connected to an ESP32 Board, I will show you how to read environmental data as Temperature, Humidity, Atmospheric Pressure and Altitude ! (might add more sensors in the future for Luminosity, Rain, UV, etc.)
Required Materials and Software
For this project, you will need the following Hardware:
- 1x ESP32 Development board
- 1x DHT22/AM2302 Humidity & Temperature sensor
- 1x BMP180 Barometric Pressure Sensor
To programm the ESP32, I will use Arduino IDE
First things first, the wiring!
Following manufacturers specs, here is the proper wiring for the two sensors and the ESP32 Development Board:
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Be careful to use the 3V3 pin on the ESP32 as the BP180 breakoutboard does not handle voltage over 3.6V !
With the wiring in place, we are now going to upload a code to read sensors data in Arduino IDE Serial Terminal, in this code, as the DHT22 ans BMP180 have slightly different temperature readings, I went for the easy/sensible option, I will just average the two readings as a temperature reference.
Note that herebelow code will also send datas from the sensors to a PHP script for display and Database storage, which I will explain in next tutorial !