DHT

Kaluma library for DHT humidity and temperature sensor

Wiring

Here is a wiring example for DHT11.

Raspberry Pi Pico	DHT11
3V3	VCC
GND	GND
GP15	DATA

Install

npm install https://github.com/niklauslee/dht

Usage

Here is an example code:

const pin = 15;
const {DHT} = require('dht');
const dht = new DHT(pin, DHT.DHT11);
let result = dht.read();
if (result) {
  console.log(result);
  console.log("Humidity: " + dht.humidity + " %");
  console.log("Temperature: " + dht.temperature + " C");
} else {
  console.log('Failed to read');
}

API

Class: DHT

new DHT(pin, [type])

• pin <number> : The pin number which connected to the data pin of the DHT sensor.
• type <number>: DHT sensor type, the default is DHT11 and DHT12, DHT21 and DHT22 could be used.

dht.read()

• Return <number[2]>

It returns humidity and temperature numbers as an array of two numbers or null if failed to read data. The first number is humidity (%) and the second is temperature (℃).

dht.humidity

• <number>

The humidity value which is red at the last call of the dht.read(). The unit of the humidity is percentage (%).

dht.temperature

• <number>

The temperature value which is red at the last call of the dht.read(). The unit of the temperature is degrees celsius (℃).

DHT.DHT11

• <number> = 0

DHT.DHT12

• <number> = 1

DHT.DHT21

• <number> = 2

DHT.DHT22

• <number> = 3