1. What you will build
Create a room temperature monitor with LCD display and LED indicator.
Guided tutorial
Digital Thermometer
Create a room temperature monitor with LCD display and LED indicator.
beginner · 25 Sept 2026
Difficulty
beginner
Learning complexity
Sections
6
Structured content blocks
Topics
8
Linked learning concepts
Related links
6
Next steps and references
2. Wire the DHT22
Connect DHT22 data pin to Arduino pin 2, with VCC and GND.
3. Connect LCD
Wire the I2C LCD to SDA (A4) and SCL (A5).
4. Add Indicator LED
Connect a green LED (comfortable) and red LED (too hot/cold).
5. Display Readings
Read DHT22 and display temperature and humidity on LCD.
6. Comfort Logic
Turn on green LED for 20-25°C, red for outside this range.
FAQ
Can I try Digital Thermometer in the simulator?
Yes. Use the Open in Lab action to load the guided build in the browser-based simulator.
Next step
Open this tutorial in the lab
Load the guided build in Ayantrik Lab and follow the same components and steps inside the simulator.