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Beginner • ~15 min read

Weather Station

Build a DHT11 temperature and humidity weather station with MudPi.

Hardware Required

  • Raspberry Pi (any model with GPIO)
  • DHT11 temperature and humidity sensor
  • 10KΩ pull-up resistor (some DHT11 modules include this)
  • Jumper wires
  • Breadboard (optional)

Wiring

Connect the DHT11 to your Raspberry Pi on GPIO pin 25:

MudPi DHT11 wiring diagram
DHT11 sensor wired to Raspberry Pi GPIO 25
  • VCC → 3.3V (Pin 1)
  • Data → GPIO 25 (Pin 22)
  • GND → Ground (Pin 6)

Note

If your DHT11 is a bare sensor (not on a breakout board), add a 10KΩ resistor between VCC and the Data pin.

Software Setup

Make sure MudPi is installed and running on your Raspberry Pi. Refer to the installation guide if you haven't set it up yet.

MudPi Configuration

Add a sensor entry to your MudPi configuration file to read from the DHT11:

mudpi.config.json 
{
  "sensor": [
    {
      "key": "weather_station",
      "interface": "gpio",
      "type": "dht",
      "pin": "D25",
      "model": 11,
      "name": "Outdoor Weather Station"
    }
  ]
}

The key fields:

  • interface — Use "gpio" for direct Raspberry Pi connections
  • type — Set to "dht" for DHT-series sensors
  • pin — The GPIO pin in digital format ("D25" for GPIO 25)
  • model — Set to 11 for DHT11 or 22 for DHT22

Results

Once MudPi starts, it will begin polling the DHT11 sensor and publishing temperature and humidity readings to Redis. You can view the data through the Solarbeam dashboard or query it directly:

Shell 
redis-cli GET "mudpi:sensor:weather_station"

Next Steps

  • Add more sensors to build a complete weather monitoring station
  • Set up triggers to alert you when temperature or humidity crosses a threshold
  • Connect a character display to show live readings
  • Upgrade to a DHT22 sensor for better accuracy and range
Previous Guide ← Adding Arduino Nodes Next Guide Using Redis with MudPi →