README
IoT Platform
Lynxari Snapshot Application
Install
Lynxari Server App for downloading a webcam image from an external server
<script type="module">
import agilatechLynxariSnapshotApplication from 'https://cdn.skypack.dev/@agilatech/lynxari-snapshot-application';
</script>
IoT Platform
gt; npm install @agilatech/lynxari-snapshot-application
Install in the same directory in which lynxari is installed. Create a config.json file to suit.
The purpose of this application is to capture a still image from a Web cam. It is intended for outdoor image capture, so it will only grab the image during daylight. Daylight can be detected either via external light sensor, or by using Lat and Lon to track sunrise and sunset.
This application runs on the Agilatech® Lynxari IoT platform. As such, it is not applicable for other environments.
To use it with Lynxari, simply insert its object definition as an element in the apps array in the applist.json file. On startup, the Lynxari server reads applist.json and starts all applications found there.
A config.json configuration file must be present in the module's main directory. For this module, that will be within the Lynxari home directory in node_modules/@agilatech/lynxari-snapshot-application/config.json
The config.json file defines an array of sources from which images will be captured. Each source contains the following:
light
Note that either lat and lon or light sensor should be defined. If all parameters of the light sensor are given it will be used, but any single one is missing then the sunrise/sunset for the location will be used. If neither the light sensor or the earth position are properly defined, then the snapshot will be disabled for that camera source.
There is no limit to the number of source objects which may appear in the sources array. The config.json file must be valid JSON.
A sample config file:
{
"sources":[
{
"name":"North Cam",
"url":"http://username:password@192.168.1.102/snapshot.jpg",
"destination":"/home/agt/webcam/latest.jpg",
"period":"5",
"light":{
"lat":42.949009,
"lon":-110.140349,
"server":"agt1",
"sensor":"SI1145",
"property":"visible",
"lowlight":5
}
}
]
}
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