DHT11 Temperature Humidity Sensor
Very low-cost temperature and humidity sensor for beginner demos.
AI Ready Overview
Quick Summary
DHT11 is a temperature humidity sensor commonly used in FYP and embedded projects. It is best for beginner weather demo and simple classroom monitoring, with wiring and testing planned around Arduino, ESP32, Raspberry Pi.
Difficulty
Beginner
Time Required
1-3 days for basic wiring and sample code; 1 week if used inside a complete FYP prototype
Cost
RM3-RM8 module range in Malaysia; full project cost depends on scope.
Components
DHT11, Arduino, ESP32, Raspberry Pi
Overview
What is DHT11?
DHT11 is a basic digital temperature and humidity sensor. It is cheap and common in beginner kits, but less accurate and slower than DHT22 or BME280.
Engineering Reference
Quick Specs
| Operating Voltage | 3.3V / 5V |
|---|---|
| Interface | Digital |
| Difficulty | Beginner |
| Typical Malaysia Price | RM3-RM8 |
| Best For | Beginner weather demo, Simple classroom monitoring |
Real Usage Notes
Suitable / Not Suitable
Suitable for
- ✓ Beginner weather demo
- ✓ Simple classroom monitoring
- ✓ Low-cost practice project
Not suitable for
- ✕ Accurate environmental logging
- ✕ Fast readings
- ✕ Professional climate monitoring
Build Planning
Difficulty
DHT11 is rated Beginner. Plan around 1-3 days for basic wiring and sample code; 1 week if used inside a complete fyp prototypedepending on wiring, libraries, calibration, dashboard/app integration and testing evidence.
Build Planning
Time Required
1-3 days for basic wiring and sample code; 1 week if used inside a complete FYP prototype
Malaysia Price Guidance
Cost
Typical module price range: RM3-RM8. This is component guidance only; a complete FYP cost depends on controller, sensors, casing, display, app/dashboard, documentation and timeline.
Connections
Pinout
VCC
Power input. Check whether the module expects 3.3V or 5V before wiring.
GND
Common ground with the controller and external supply.
Digital
Main Digital connection used by the module.
IO
Additional signal pins depend on the exact module variant.
Platform Notes
Wiring Guides
DHT11 with Arduino / ESP32
Connect power, ground and the Digital signal lines. Use level shifting when a 5V module connects to a 3.3V controller.
| DHT11 VCC | 5V or module-rated supply |
|---|---|
| DHT11 GND | Controller GND |
| Signal pins | Digital |
Fix Common Problems
Troubleshooting
Troubleshooting
Common Mistakes
FYP Ideas Using DHT11
Related Projects
Compare Options
Alternative Components
Student Questions
FAQ
Is DHT11 good for FYP projects?
Yes, DHT11 is suitable for FYP work when the project matches its limits: Beginner weather demo and Simple classroom monitoring.
What is the most common DHT11 mistake?
Expecting DHT22 accuracy