pigpio-dht

Dht sensor control using node.js and pigpio. Supported sensors are DHT11, DHT22 and AM2302.

Installation

1. Install pigpio C library.
2. Install module: npm i pigpio-dht.

Usage

``javascript
const dht = require('dht');
const sensor = dht(dataPin, dhtType);
`

| Sensor | dhtType |
|-----------------|:----------------:|
| DHT11 | 11 |
| DHT22 or AM2302 | 22 |

$3

`javascript
const dht = require('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');
});
`

$3


#### read()

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.

$3

#### start

Emitted when starting to read a value.

#### end

Emitted when the reading stops. This because it was complete, an error occurred or anything else.

#### result

- result object containing temperature and humidity

Emitted when the reading was completed successful.

#### badChecksum`

Emitted when finished reading but the checksum was invalid.

Built With

* pigpio - Gpio wrapper for nodejs

Versioning

We use SemVer for versioning. For the versions available, see the tags on this repository.