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1. A Foot in the Front Door > 9. Ring a Bell to Alert the House

Ring a Bell to Alert the House

The chime module provides an easy way to add audible alerts to your home automation system. Simply plug it in, and then tell it to sound off with a single command.

The chime module, shown in Figure 1-9, is quite simplistic. You need only to set its house and unit codes, and then to plug it in. When it receives an On command, it makes a doorbell-like “ding-dong” sound that repeats three times. There’s no way to make it ring in any other pattern, and there’s no volume control, so this module is a take-it-or-leave-it affair.

The chime module most commonly is used as a remote doorbell and is helpful particularly if your home’s bell is too quiet to hear throughout the house. You can set up a Powerflash to trigger the module with your existing doorbell button, or set its house and unit code to the same as a motion detector and have it chime automatically every time the motion detector signals that someone is nearby. This probably would get annoying quite quickly because it will chime every time the motion detector is triggered, so it’s better to control it with a script that limits how often it goes off [Hack #85].


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