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This guide explains how to display temperature and humidity data from a DHT11/DHT22 sensor on a 16x2 LCD using Python on a Raspberry Pi.
Step 1: Gather Required Components
Raspberry Pi (any model with GPIO support)
DHT11 or DHT22 sensor
16x2 LCD with I2C backpack
10kΩ pull-up resistor (if using raw DHT sensor)
Breadboard and jumper wires
Step 2: Wiring the Components
Connect the DHT Sensor: VCC → 3.3V or 5V pin on Raspberry Pi GND → Ground pin Data → GPIO pin (e.g., GPIO4) with a 10kΩ pull-up resistor between VCC and Data.
Connect the I2C LCD: SDA → GPIO2 (SDA) SCL → GPIO3 (SCL) VCC → 5V GND → Ground
Step 3: Enable I2C on Raspberry Pi
Run the following commands to enable I2C:
sudo raspi-configCopied!✕CopyNavigate to Interface Options > I2C > Enable.
Reboot the Raspberry Pi:
sudo rebootCopied!✕CopyStep 4: Install Required Libraries
Install Python libraries for the DHT sensor and LCD:
sudo apt updatesudo apt install python3-pip i2c-toolspip3 install adafruit-circuitpython-charlcd Adafruit_DHTCopied!✕Copy Raspberry Pi: DHT11/DHT22 Temperature and Humidity (Python)
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