🌤 Raspberry Pi Pico W – DHT22 Temperature & Humidity Sensor (MicroPython)

Reads temperature (°C) and humidity (%) values using a DHT22 sensor and displays them over the serial console.

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⚙️ Hardware Setup

DHT22 Pin	Pico W Pin	Description
VCC	3.3V	Power
DATA	GPIO16	Sensor Data
GND	GND	Ground
(Optional)	10kΩ resistor between VCC and DATA	Pull-up for stable readings

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🧠 Working Principle

The DHT22 is a digital sensor that measures:

• Temperature (range: -40°C to +80°C)
• Humidity (range: 0% to 100%)

The Pico W communicates using single-wire timing via MicroPython’s dht module.

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🚀 Run Steps

1. Flash MicroPython firmware to your Pico W
2. Open Thonny IDE → select MicroPython (Raspberry Pi Pico)
3. Save the code as main.py on the Pico W
4. Open the Shell window → View live sensor readings every 2 seconds

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💡 Future Upgrades

• Display readings on SSD1306 OLED
• Send data over Wi-Fi to a web dashboard
• Log data to an SD card