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IoTAdvanced 5 hours

Mini Weather Station

DHT22 + BMP280 + 0.96" OLED. A great intro to I2C and reading multiple sensors at once.

Required components

  • Arduino UNO
  • DHT22 Sensor
  • BMP280 Sensor
  • 0.96" OLED Display
  • Breadboard
  • Jumper Wires
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Circuit diagram

Shared I2C bus on A4/A5 for OLED and BMP280. DHT22 on D2 with pull-up resistor.

Interactive 3D circuit viewer coming in the Virtual Lab.

Step-by-step guide

  1. 1

    Connect DHT22 to digital pin 2 (with 10kΩ pull-up).

  2. 2

    Wire BMP280 and OLED via I2C: SDA→A4, SCL→A5.

  3. 3

    Install DHT, Adafruit_BMP280 and SSD1306 libraries.

  4. 4

    Upload sketch — readings refresh every second.

Code

// Pseudocode — see Botix tutorial video for full sketch
#include <DHT.h>
#include <Adafruit_BMP280.h>
#include <Adafruit_SSD1306.h>
// ... init and loop reading sensors, draw to OLED

Need help?

Stuck on a step?

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