WeatherNode

This a Node JS based Weather Station data node designed to run on a Raspberry Pi. Currently it supports a small number of sensors. It supports sending data to the Adafruit IO service and MQTT (currently in development).

Structure

Weather Node

This is the main data gathering application. Currently it has been developed to push the data to the Adafruit IO data platform.

Sensors

Currently there are two supported sensors:

• DHT22 - This driver is for the DHT22 family of temperature and humidity sensors. The following devices have been tested: DHT11, DHT22, AM2302
• BMP085 - This driver is for the BMP085 family of temperature and pressure sensors. The following devices have been tested: BMP085, BMP180

Installation

Getting started with Weather Node

1. Download the either the latest release from here or download a copy of the latest version of the master branch.
2. Unzip the file into the prefered location.
3. Setup the require sensors running npm install in the root of the required sensors.
4. Navigate to the root folder of the WeatherNode application and run npm install.
5. Navigate to the src folder and rename the template configuration file config.json.orig to config.json.
6. Edit the config file, specifying details of the sensors and data target.
7. Run the application using node app.

Enabling the DHT22 sensor

The DHT22 sensor uses the node-dht-sensor module. The README has instructions on how to setup the sensor, but in short you need to install the BCM2835 C library on your Raspberry Pi first.

Configuration

Sensors

DHT22

Example Configuration:

  {
      "type": "../../../Sensors/DHT22/dht22.js",
      "id": "Sensor 2", // The sensor's name
      "settings": {
          "pin": 4 // The GPIO pin the sensor is connected to
      }
  }

BMP085

Example Configuration:

  {
      "type": "../../../Sensors/BMP085/bmp085.js",
      "id": "Sensor 3", // The sensor's name
      "settings": { } 
  }

Data Target

Adafruit IO

Example Configuration:

  "type": "./adafruitIo.js",
  "config": {
      "aioKey":"XXXXXXXX", // The Adafruit IO 'AIO' key
      "user":"XXXXXXXX", // Your Adafruit IO username
      "feeds":[
          {
              "id":"test-temp", // The Adafruit IO feed id
              "sensor": "Sensor 1", // The sensor's whose data is sent to the feed's name 
              "type": "t" // The type of data to be sent. Either 't' (temperature), 'p' (pressure) or 'h' (humidity).
          }
      ]
  }

MQTT

Example Configuration:

  "type": "./mqtt.js",
  "config": {
      "host":"mqtt://mqttbroker.local", // The URI of the target MQTT broker server
      "topics":[
          {
              "topic":"test/temp", // The MQTT topic to be published
              "sensor": "Sensor 1", // The sensor's whose data is published to the topic's name 
              "type": "t" // The type of data to be sent. Either 't' (temperature), 'p' (pressure) or 'h' (humidity).
          }
      ]
  }