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A knob opens and closes a vent
The servo follows the potentiometer; DHT22 humidity goes to the LCD.
dht22lcd1602_i2cpotservo
Sensor
DHT22 / AM2302 temperature-humidity sensor
dht221-Wire
Why this support circuit is added
Temperature-humidity sensor.
Grounded in the catalog and golden patterns (real open-source circuits). Every auto-inserted part comes with a reason.
Support circuit added automatically1
Using this part in a project adds the circuit below, each element with its reason.
Pull-up resistor
DATA → VCC
Single-wire protocol pull-up (datasheet: 10 kΩ).
Interface1-Wire
- Catalog id
- dht22
- Category
- Sensor
- Protocol
- 1-Wire
- Logic level
- Unrestricted (uses the board rail)
Firmware detection2
Any of these #includes identifies this part
#include <DHT.h> #include <DHT_U.h>
Examples using this part
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