Arduino DHT22 LCD Monitor
An Arduino temperature and humidity monitor commonly combines a DHT22 sensor with an I2C display. This schematic shows the DHT22 data line and its pull-up resistor, along with the display’s two-wire SDA and SCL bus. All modules share the same regulated 5 V supply and ground. In code, read the sensor at its supported interval and update the display with the latest values. Check the I2C address of the display before uploading the sketch, because similar modules can use different addresses. For longer sensor cables or noisier environments, use good grounding and follow the sensor manufacturer’s supply decoupling guidance. Label the selected Arduino pins in the project notes.
Open it in the AI editor with a prompt pre-filled — keep what works, change what doesn't.
Scenario
Arduino temperature and humidity display
Key decisions
- Sensor bus: Add the required data pull-up resistor.
- Display bus: Use SDA and SCL for the I2C display.
- Supply: Decouple the shared 5 V rail.
When to reuse this
Use for a simple Arduino temperature and humidity monitor.
Frequently asked questions
Why does the DHT22 need a pull-up?
What pins does I2C use?
Can the display and sensor share 5 V?
More arduino examples
Try the diagram makers.
Tweak it with chat, export PNG/SVG, or fork it for your own use case.