An Arduino motion sensor example that logs to MongoLab's REST API and to an email address.
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mongolab-motion

Picture of the rig

An Arduino motion sensor example that logs to MongoLab's REST API and to an email address.

This simple Node.js example sends Arduino sensor data to a MongoDB database hosted at MongoLab. It uses the MongoLab REST API. It also sends results based on rules to email.

The hardware in the photo is an Arduino UNO R3 and a Parallax PIR motion sensor (the white dome in the lower right).

The motion sensor behaves like a switch, with 'down' events emitted on motion detection, and 'up' events a few seconds after motion ceases to be detected.

MongoLab's REST API is used to record these motion detected and motion ceased events with a timestamp.

The events can be emailed as well. What events are emailed are determined by two configurable callbacks with parameters of timestamp and running count of events. Two simple filters are provided, including one that sends email only if the time of the event is between 7pm and 8am. The other sends email every 10th event.

How To

Open the config-sample.js file and fill in your MongoLab REST API credentials and mail (SMTP) config and credentials.

Rename the file to config.js.

You can view events in either the MongoLab API or through the mongo shell, if you have that installed. The screen on the left is the MongoLab list view.

Tested against SendGrid's free SMTP endpoint.

With thanks to the Arduino community, esp. Rick Waldon for Johnny Five, SendGrid for the Uno board, esp. @swiftalphaone for the Waza tutorial, and the Node.js and Javascript community.

March 2013

MIT License

Copyright (c) 2013 Benson Wen

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.