ESP32 Weather Station

ESP32 weather station with DHT22 temperature / humidity sensor and SSD1306 display.

Overall price is about £15

Video: https://www.youtube.com/watch?v=bA8N2sMjCUM

Instructions

What you should already have

1. Arduino IDE: https://www.arduino.cc/en/Guide/HomePage
2. ESP32 OLED: https://www.amazon.co.uk/MakerHawk-Development-Bluetooth-Module-Arduino/dp/B071G2MYX2/ref=sr_1_3?ie=UTF8&qid=1536170567&sr=8-3&keywords=esp32%2Boled&th=1
3. Temperature and humidity sensor DHT22: https://www.amazon.co.uk/Digital-Temperature-Humidity-Measure-Arduino/dp/B06WLKQMHY/ref=sr_1_7?s=computers&ie=UTF8&qid=1536170623&sr=1-7&keywords=DHT22
4. USB cable to connect the ESP32 to your PC.
5. Soldering iron (station)
6. Spool of solder
7. 3 wires to connect the DHT22 to ESP32

Soldering

• Solder + pin of DHT22 to 3.3V pin on ESP32
• Solder - pin of DHT22 to GND pin on ESP32
• Solder out pin of DHT22 to pin number 16 on ESP32

Install all required Arduino libraries

How to install arduino library: https://www.arduino.cc/en/Guide/Libraries

The libraries we need.

• Time library: https://github.com/PaulStoffregen/Time
• DHT Sensor Library for ESP32: https://github.com/beegee-tokyo/DHTesp
• SSD1306 display library: https://github.com/ThingPulse/esp8266-oled-ssd1306
• esp8266-weather-station: https://github.com/gandalf15/esp8266-weather-station

Add ESP32 as your board

• Check out this link: https://github.com/espressif/arduino-esp32
• More specifically this section: https://github.com/espressif/arduino-esp32/blob/master/docs/arduino-ide/boards_manager.md

Clone

clone this repository to your Arduino projects folder with command:

$ git clone https://github.com/gandalf15/esp32_weather_station.git

Edit

1. Open esp32_weather_station.ino project in Arduino IDE
2. set up your WiFi SSID (name)
3. set up your WiFi password
4. Sign up here to get an API key: https://docs.thingpulse.com/how-tos/openweathermap-key/
5. set up your API key
6. set up either imperial or metric units IS_METRIC = [true | false]
7. find your city ID here: http://bulk.openweathermap.org/sample/city.list.json.gz
8. set up your city ID

Compile and Upload

1. Connect your ESP32 via the USB cable to your computer and click on the upload icon.

Done