{"id":18143,"date":"2018-01-29T15:30:46","date_gmt":"2018-01-29T14:30:46","guid":{"rendered":"http:\/\/www.recantha.co.uk\/blog\/?p=18143"},"modified":"2018-01-29T14:44:56","modified_gmt":"2018-01-29T13:44:56","slug":"diy-electricity-meter-using-a-raspberry-pi-zero-w-and-some-mqtt-api-wizardry","status":"publish","type":"post","link":"https:\/\/www.recantha.co.uk\/blog\/?p=18143","title":{"rendered":"DIY electricity meter using a Raspberry Pi Zero W and some MQTT\/API wizardry"},"content":{"rendered":"<p><a href=\"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2018\/01\/electricity_meter.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-18144\" src=\"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2018\/01\/electricity_meter.jpg?resize=500%2C375&#038;ssl=1\" alt=\"\" width=\"500\" height=\"375\" srcset=\"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2018\/01\/electricity_meter.jpg?w=500&amp;ssl=1 500w, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2018\/01\/electricity_meter.jpg?resize=300%2C225&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2018\/01\/electricity_meter.jpg?resize=260%2C195&amp;ssl=1 260w, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2018\/01\/electricity_meter.jpg?resize=160%2C120&amp;ssl=1 160w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/p>\n<p>Kelly Hirano wanted to see how switching devices in his home on and off affected his electricity usage. Excited by the possibilities of reading the data from his SmartMeter, he discovered that he could buy a product (<a href=\"https:\/\/www.amazon.com\/dp\/B07681Y7ZV\/\" target=\"_blank\" rel=\"noopener\">a Rainforest Eagle-200<\/a>) which would expose the data via an API. Looking at their <a href=\"https:\/\/rainforestautomation.com\/wp-content\/uploads\/2017\/02\/EAGLE-200-Local-API-Manual-v1.0.pdf\" target=\"_blank\" rel=\"noopener\">API documentation<\/a>, he dug into the data using a Raspberry Pi Zero W and sent it out to a\u00a0<a href=\"https:\/\/mosquitto.org\/\" target=\"_blank\" rel=\"noopener\">MQTT broker running Mosquito<\/a>, as well as recording it locally. He added a <a href=\"https:\/\/shop.pimoroni.com\/products\/four-letter-phat\" target=\"_blank\" rel=\"noopener\">Pimoroni Four Letter pHAT<\/a>\u00a0to the Zero to display the data. You can <a href=\"https:\/\/kellyhirano.tumblr.com\/post\/170232890722\/iot-project-instantaneous-power-demand-with\" target=\"_blank\" rel=\"noopener\">read a bit more over on his blog<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Kelly Hirano wanted to see how switching devices in his home on and off affected his electricity usage. Excited by the possibilities of reading the data from his SmartMeter, he discovered that he could buy a product (a Rainforest Eagle-200)&hellip;<\/p>\n<p class=\"more-link-p\"><a class=\"more-link\" href=\"https:\/\/www.recantha.co.uk\/blog\/?p=18143\">Read more &rarr;<\/a><\/p>\n","protected":false},"author":1,"featured_media":18144,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[25,39,86],"tags":[622],"class_list":["post-18143","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-home-automation","category-programming","category-raspberry-pi-zero","tag-electricity-meter"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>DIY electricity meter using a Raspberry Pi Zero W and some MQTT\/API wizardry - Raspberry Pi Pod<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.recantha.co.uk\/blog\/?p=18143\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DIY electricity meter using a Raspberry Pi Zero W and some MQTT\/API wizardry - Raspberry Pi Pod\" \/>\n<meta property=\"og:description\" content=\"Kelly Hirano wanted to see how switching devices in his home on and off affected his electricity usage. Excited by the possibilities of reading the data from his SmartMeter, he discovered that he could buy a product (a Rainforest Eagle-200)&hellip;Read more &rarr;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.recantha.co.uk\/blog\/?p=18143\" \/>\n<meta property=\"og:site_name\" content=\"Raspberry Pi Pod\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/recantha\/\" \/>\n<meta property=\"article:published_time\" content=\"2018-01-29T14:30:46+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/i1.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2018\/01\/electricity_meter.jpg?fit=500%2C375&ssl=1\" \/>\n\t<meta property=\"og:image:width\" content=\"500\" \/>\n\t<meta property=\"og:image:height\" content=\"375\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Michael Horne\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@recantha\" \/>\n<meta name=\"twitter:site\" content=\"@recantha\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Michael Horne\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.recantha.co.uk\\\/blog\\\/?p=18143#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.recantha.co.uk\\\/blog\\\/?p=18143\"},\"author\":{\"name\":\"Michael Horne\",\"@id\":\"https:\\\/\\\/www.recantha.co.uk\\\/blog\\\/#\\\/schema\\\/person\\\/c27c4ef2ee1c18b130f1fcd5dcdbb263\"},\"headline\":\"DIY electricity meter using a Raspberry Pi Zero W and some MQTT\\\/API wizardry\",\"datePublished\":\"2018-01-29T14:30:46+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.recantha.co.uk\\\/blog\\\/?p=18143\"},\"wordCount\":118,\"commentCount\":1,\"publisher\":{\"@id\":\"https:\\\/\\\/www.recantha.co.uk\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.recantha.co.uk\\\/blog\\\/?p=18143#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/i0.wp.com\\\/www.recantha.co.uk\\\/blog\\\/wp-content\\\/uploads\\\/2018\\\/01\\\/electricity_meter.jpg?fit=500%2C375&ssl=1\",\"keywords\":[\"electricity meter\"],\"articleSection\":[\"Home automation\",\"Programming\",\"Raspberry Pi Zero\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.recantha.co.uk\\\/blog\\\/?p=18143#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.recantha.co.uk\\\/blog\\\/?p=18143\",\"url\":\"https:\\\/\\\/www.recantha.co.uk\\\/blog\\\/?p=18143\",\"name\":\"DIY electricity meter using a Raspberry Pi Zero W and some MQTT\\\/API wizardry - 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It uses an MQTT service to provide status updates to the display and there's a web-based interface to change that status. 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The system uses Z-Wave door sensors which send MQTT messages to the Pi via the Home Assistant\u00a0open-source home automation platform. The PIR sensor\u2026","rel":"","context":"In &quot;Accessories&quot;","block_context":{"text":"Accessories","link":"https:\/\/www.recantha.co.uk\/blog\/?cat=54"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2017\/08\/alarm.jpg?fit=900%2C675&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2017\/08\/alarm.jpg?fit=900%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2017\/08\/alarm.jpg?fit=900%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2017\/08\/alarm.jpg?fit=900%2C675&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":16882,"url":"https:\/\/www.recantha.co.uk\/blog\/?p=16882","url_meta":{"origin":18143,"position":2},"title":"Weather forecasting cloud has a Raspberry Pi Zero W at its core","author":"Michael Horne","date":"30 May 2017","format":false,"excerpt":"My apologies for the lack of updates recently. I had a bit of a health problem involving a medication imbalance and it meant I couldn't concentrate on anything but the bare essentials. I've also been busy rehearsing for a\u00a0new musical called Cloud at Sharnbrook Mill Theatre in Bedfordshire. It goes\u2026","rel":"","context":"In &quot;Accessories&quot;","block_context":{"text":"Accessories","link":"https:\/\/www.recantha.co.uk\/blog\/?cat=54"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2017\/05\/weatherforecastingcloud.jpg?fit=768%2C1024&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2017\/05\/weatherforecastingcloud.jpg?fit=768%2C1024&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2017\/05\/weatherforecastingcloud.jpg?fit=768%2C1024&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2017\/05\/weatherforecastingcloud.jpg?fit=768%2C1024&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":16947,"url":"https:\/\/www.recantha.co.uk\/blog\/?p=16947","url_meta":{"origin":18143,"position":3},"title":"Create a weather forecasting lamp using a Raspberry Pi Zero","author":"Michael Horne","date":"20 June 2017","format":false,"excerpt":"\"The Modern Inventor\" has written a great Instructable which helps you to create your very own weather forecasting lamp called the Storm Glass. 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Here's what they say about RabbitMQ: With Pivotal RabbitMQ, we have a highly scalable, efficient, easy-to-deploy message queue. Beyond the long list of support for languages and protocols that could connect\u2026","rel":"","context":"In &quot;Software&quot;","block_context":{"text":"Software","link":"https:\/\/www.recantha.co.uk\/blog\/?cat=49"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":16914,"url":"https:\/\/www.recantha.co.uk\/blog\/?p=16914","url_meta":{"origin":18143,"position":5},"title":"Build your own Fartometer with a Raspberry Pi and a Wemos D1","author":"Michael Horne","date":"15 June 2017","format":false,"excerpt":"Dr Lucy Rogers has taken inspiration from IBM's IoT HQ and created an ambient air quality sensor that works using MQTT messages through the IBM Watson IoT Quickstart Platform. 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