<story><title>IoTaWatt Open Source WiFi Electric Power Monitor</title><url>https://www.iotawatt.com/</url></story><parent_chain><item><author>joezydeco</author><text>Just an FYI that your home may already have a grid-connected meter outside, and it may already have a wireless interface.&lt;p&gt;For example, if you&amp;#x27;re a ComEd customer in the Chicago area, your smart meter is Zigbee-enabled and works with a handful of approved devices:&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.comed.com&amp;#x2F;WaysToSave&amp;#x2F;ForYourHome&amp;#x2F;Pages&amp;#x2F;SmartMeterConnectedDevices.aspx&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.comed.com&amp;#x2F;WaysToSave&amp;#x2F;ForYourHome&amp;#x2F;Pages&amp;#x2F;SmartMete...&lt;/a&gt;&lt;p&gt;The information won&amp;#x27;t be as finely detailed since it&amp;#x27;s not sensing every circuit in the home, but for $70 and no tinkering necessary I can read my home&amp;#x27;s consumption in XML format every 10 seconds.</text></item></parent_chain><comment><author>detaro</author><text>And some power meters have IR-based interfaces. A &amp;quot;blink every X Wh of energy used&amp;quot; LED is quite common, but some also have bidirectional IR interfaces, recognizable by a metal circle with two lenses at the front (read heads are magnetic and simply set on the metal plate). (might be a European thing though)</text></comment>
<story><title>IoTaWatt Open Source WiFi Electric Power Monitor</title><url>https://www.iotawatt.com/</url></story><parent_chain><item><author>joezydeco</author><text>Just an FYI that your home may already have a grid-connected meter outside, and it may already have a wireless interface.&lt;p&gt;For example, if you&amp;#x27;re a ComEd customer in the Chicago area, your smart meter is Zigbee-enabled and works with a handful of approved devices:&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.comed.com&amp;#x2F;WaysToSave&amp;#x2F;ForYourHome&amp;#x2F;Pages&amp;#x2F;SmartMeterConnectedDevices.aspx&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.comed.com&amp;#x2F;WaysToSave&amp;#x2F;ForYourHome&amp;#x2F;Pages&amp;#x2F;SmartMete...&lt;/a&gt;&lt;p&gt;The information won&amp;#x27;t be as finely detailed since it&amp;#x27;s not sensing every circuit in the home, but for $70 and no tinkering necessary I can read my home&amp;#x27;s consumption in XML format every 10 seconds.</text></item></parent_chain><comment><author>ssl-3</author><text>AEP Ohio ended their program last year.  But before that, they even went as far as sending out freebie Wifi-connected Zigbee bridges to interface the meter before the program went tits-up.&lt;p&gt;Now that there are zero applications for it, it&amp;#x27;s about as useful as a dumb meter.&lt;p&gt;Progress.</text></comment>