Dht sensor control using node.js and pigpio. Supported sensors are DHT11, DHT22 and AM2302.
- Install pigpio C library.
- Install module:
npm i pigpio-dht.
const dht = require('pigpio-dht');
const sensor = dht(dataPin, dhtType);| Sensor | dhtType |
|---|---|
| DHT11 | 11 |
| DHT22 or AM2302 | 22 |
const dht = require('pigpio-dht');
const dataPin = 5;
const dhtType = 22; //optional
const sensor = dht(dataPin, dhtType);
setInterval(() => {
sensor.read();
}, 2500); // the sensor can only be red every 2 seconds
sensor.on('result', data => {
console.log(`temp: ${data.temperature}°c`);
console.log(`rhum: ${data.humidity}%`);
});
sensor.on('badChecksum', () => {
console.log('checksum failed');
});Start a new reading of the sensor. This can't be called more then once every second for the DHT11 sensor or once every 2 seconds for the DHT22 sensor.
Emitted when starting to read a value.
Emitted when the reading stops. This because it was complete, an error occurred or anything else.
- result object containing temperature and humidity
Emitted when the reading was completed successful.
Emitted when finished reading but the checksum was invalid.
- pigpio - Gpio wrapper for nodejs
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