ESP32 Weather Display

Steps

1. Wire the DHT22

   VCC to 3.3V, GND to GND, DATA to GPIO 4.

2. Wire the OLED

   VCC to 3.3V, GND to GND, SDA to GPIO 21, SCL to GPIO 22.

3. Install libraries

   Install DHT sensor library, Adafruit GFX and Adafruit SSD1306 from the Library Manager and add ESP32 board support.

4. Upload

   Select 'ESP32 Dev Module' and upload the sketch.

Code

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <DHT.h>

DHT dht(4, DHT22);
Adafruit_SSD1306 oled(128, 64, &Wire, -1);

void setup() {
  dht.begin();
  oled.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  oled.setTextColor(SSD1306_WHITE);
}

void loop() {
  float t = dht.readTemperature(), h = dht.readHumidity();
  oled.clearDisplay(); oled.setTextSize(2);
  oled.setCursor(0, 8);  oled.print(t, 1); oled.print(" C");
  oled.setCursor(0, 40); oled.print(h, 0); oled.print(" %");
  oled.display();
  delay(2000);
}