{"id":1950,"date":"2020-12-04T15:49:28","date_gmt":"2020-12-04T14:49:28","guid":{"rendered":"https:\/\/www.nerdiy.de\/?p=1950"},"modified":"2021-12-18T18:04:03","modified_gmt":"2021-12-18T17:04:03","slug":"how-to-nodered-frigo-door-monitoring-using-energy-consumption","status":"publish","type":"post","link":"https:\/\/nerdiy.de\/nl\/how-to-nodered-frigo-door-monitoring-using-energy-consumption\/","title":{"rendered":"HowTo: Node Red - Controle van de koelkastdeur op basis van energieverbruik"},"content":{"rendered":"<p>De afgelopen weken heb ik vaak het probleem gehad dat de deur van mijn vriezer niet goed sloot. Dit had tot gevolg dat minstens \u00e9\u00e9n nacht de koelkastdeur bijna zeven uur lang niet goed gesloten was.<\/p>\n\n\n\n<p>Toen mij dit een paar dagen later opnieuw overkwam, besloot ik dat ik er iets aan wilde doen. Voor mij zou het voldoende zijn als ik ge\u00efnformeerd zou worden als ik de koelkastdeur weer te lang open liet staan.<\/p>\n\n\n\n<p>Na wat experimenteren ontstond de hieronder beschreven NodeRed-code. Hiermee (en een wifi-compatibel stopcontact dat ook de verbruikte energie kan meten) kun je op basis van het energieverbruik van de koelkast zien of de koelkastdeur dicht of open is.<\/p>\n\n\n\n<p>Hiervoor meet de NodeCode continu het stroomverbruik (via het stopcontact) en detecteert wanneer dit te hoog is. Dit is meestal het geval wanneer de deur van de koelkast te lang open blijft staan, waardoor de temperatuur binnenin stijgt en dit zorgt er op zijn beurt voor dat de koelcompressor van de koelkast vaker opstart of helemaal niet wordt uitgeschakeld.<\/p>\n\n\n\n<p>Meer details en waar u rekening mee moet houden bij het opzetten van uw eigen koelkastmonitoring vindt u in het volgende artikel.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n<h2><span style=\"color: #ff0000;\">Veiligheidsinstructies <\/span><\/h2>\r\n<p><span style=\"color: #ff0000;\">Ik weet dat de volgende opmerkingen altijd een beetje vervelend zijn en onnodig lijken. Helaas hebben veel mensen die &quot;beter&quot; wisten door onvoorzichtigheid ogen, vingers of andere dingen verloren of zichzelf verwond. Gegevensverlies is in vergelijking bijna te verwaarlozen, maar zelfs dit kan erg vervelend zijn. Neem daarom vijf minuten de tijd om de veiligheidsinstructies te lezen. Omdat zelfs het coolste project geen blessure of andere problemen waard is.<\/span><br \/><strong><em><a href=\"https:\/\/nerdiy.de\/nl\/veiligheidsinstructies\/\"><span style=\"color: #ff0000;\">https:\/\/www.nerdiy.de\/sicherheitshinweise\/<\/span><\/a><\/em><\/strong><\/p>\r\n<h2>Affiliate links \/ reclame links<\/h2>\r\n<p><em>De hier vermelde links naar online winkels zijn zogenaamde affiliate-links. Als u op zo&#039;n affiliate-link klikt en via deze link een aankoop doet, ontvangt Nerdiy.de een commissie van de betreffende onlineshop of aanbieder. De prijs verandert voor jou niet. Als u via deze links uw aankopen doet, steunt u Nerdiy.de om in de toekomst andere nuttige projecten aan te kunnen bieden. \ud83d\ude42\u00a0<\/em><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Eisen<\/h2>\n\n\n\n<p><strong>Handige artikelen:<br><\/strong>Om nieuwe nodes te kunnen installeren, moet NodeRed natuurlijk al ge\u00efnstalleerd zijn.<br>Hoe je een RaspberryPi voorbereidt en vervolgens NodeRed erop installeert, wordt beschreven in de volgende artikelen.<\/p>\n\n\n\n<p>In de volgende drie artikelen wordt beschreven wat er moet gebeuren om de RaspberryPi voor te bereiden:<br><strong><em><a href=\"https:\/\/nerdiy.de\/nl\/raspberrypi-setup-voor-nerds\/\">RaspberryPi \u2013 setup voor nerds!<\/a><\/em><\/strong><br><strong><em><a href=\"https:\/\/nerdiy.de\/nl\/raspberrypi-de-eerste-configuratie\/\">RaspberryPi \u2013 De eerste configuratie!<br><\/a><a href=\"https:\/\/nerdiy.de\/nl\/kan-telefoon-voor-de-kleintjes-communiceren-met-de-raspberrypi-via-het-ssh-protocol\/\">RaspberryPi \u2013 Bedien de RaspberryPi via SSH<\/a><\/em><\/strong><br><a href=\"https:\/\/nerdiy.de\/nl\/nodered-installatie-van-nodered-op-de-raspberrypi\/\"><strong><em>NodeRed \u2013 NodeRed installeren op de RaspberryPi<\/em><\/strong><\/a><br><strong><em><a href=\"https:\/\/nerdiy.de\/nl\/nodered-install-new-nodes\/\">NodeRed \u2013 Installeer nieuwe knooppunten<\/a><\/em><\/strong><br><em><strong><a href=\"https:\/\/www.nerdiy.de\/wp-admin\/post.php?post=1198&amp;action=edit\">NodeRed - importeer en exporteer knooppuntcode<\/a><\/strong><\/em><\/p>\n\n\n\n<p><strong>Vereist gereedschap:<br><\/strong>-Nee-<\/p>\n\n\n\n<p><strong>Benodigd materiaal:<\/strong><\/p>\n\n\n\n<p><strong>In de volgende lijst vindt u alle onderdelen die u nodig heeft om dit artikel te implementeren.<\/strong> <\/p>\n\n\n<div id=\"footable_parent_4042\"\n         class=\"footable_parent ninja_table_wrapper loading_ninja_table wp_table_data_press_parent semantic_ui\">\n                <table data-ninja_table_instance=\"ninja_table_instance_0\" data-footable_id=\"4042\" data-filter-delay=\"1000\" aria-label=\"Klaar: RaspberryPi basisuitrusting\"            id=\"footable_4042\"\n           data-unique_identifier=\"ninja_table_unique_id_1884943366_4042\"\n           class=\"foo-table ninja_footable foo_table_4042 ninja_table_unique_id_1884943366_4042 ui table  nt_type_ajax_table selectable striped vertical_centered  footable-paging-right\">\n                <colgroup>\n                            <col class=\"ninja_column_0\">\n                            <col class=\"ninja_column_1\">\n                            <col class=\"ninja_column_2\">\n                            <col class=\"ninja_column_3\">\n                            <col class=\"ninja_column_4\">\n                            <col class=\"ninja_column_5\">\n                    <\/colgroup>\n            <\/table>\n    \n    \n    \n<\/div>\n\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Installeer de vereiste knooppunten<\/h2>\n\n\n\n<p>Voor deze stroom zijn eigenlijk geen speciale knooppunten nodig. De meeste behoren tot de standaardknooppunten van NodeRed. Alleen het dashboardknooppunt is vereist om de verzamelde gegevens te visualiseren. Meer informatie hierover vindt u in het artikel <strong><em><a href=\"https:\/\/nerdiy.de\/nl\/nodered-maak-een-gebruikersinterface-met-dashboard-nodes\/\" target=\"_blank\" rel=\"noreferrer noopener\">NodeRed \u2013 Cre\u00eber een gebruikersinterface met dashboardknooppunten<\/a><\/em><\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">De functie<\/h2>\n\n\n\n<p>Allereerst: deze NodeCode is nog niet perfect, maar hij werkt al een paar weken behoorlijk betrouwbaar voor mijn koelkast. <\/p>\n\n\n\n<p>De werking laat zich het beste uitleggen aan de hand van onderstaande afbeeldingen en een stukje uitleg over hoe een koelkast werkt. <\/p>\n\n\n\n<p>Een koelkast koelt de lucht binnenin met behulp van een koelcompressor. Deze koelcompressor wordt via een thermostaat automatisch in- en uitgeschakeld wanneer de lucht in de koelkast te warm wordt. Dit betekent (bijvoorbeeld in mijn koelkast) dat de koelcompressor daadwerkelijk maar ongeveer 30 minuten per uur aanstaat. De rest van de tijd blijft de temperatuur binnen behouden dankzij de goede thermische isolatie van een koelkast. Uiteraard kunnen deze waarden er bij andere koelkasten anders uitzien. Als een koelkast bijvoorbeeld beter ge\u00efsoleerd is, hoeft de koelcompressor minder vaak te starten.<\/p>\n\n\n\n<p>In ieder geval kunt u profiteren van de looptijd van de koelcompressor. Als het in de koelkast permanent te warm is (bijvoorbeeld door een open deur), blijft de koelcompressor langer ingeschakeld. Als de temperatuur in de koelkast niet daalt, kan dit er zelfs voor zorgen dat de koelcompressor permanent ingeschakeld blijft.<\/p>\n\n\n\n<p>Een ingeschakelde koelcompressor is te herkennen aan het elektriciteitsverbruik van de koelkast. Mijn koelkast verbruikt (bijvoorbeeld) ongeveer 80 tot 100 W met de koelcompressor aan. Omdat hij slechts ongeveer 30 minuten per uur ingeschakeld is, komt dit overeen met een verbruik van 40 tot 50 W per uur. <\/p>\n\n\n\n<p>Het is u wellicht al opgevallen: Als u weet welk verbruik u normaal gesproken per uur verwacht en plotseling beseft dat het huidige verbruik van de koelkast hoger is, kunt u er vrij zeker van zijn dat dit komt doordat een koelcompressor te lang draait en dus een openstaande is. De koelkastdeur liegt.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Het probleem:<\/h3>\n\n\n\n<p>Het detecteren van het gemiddelde verbruik in het verleden gaat erg langzaam.<\/p>\n\n\n\n<div class=\"wp-block-media-text alignwide is-stacked-on-mobile has-light-gray-background-color has-background\"><figure class=\"wp-block-media-text__media\"><a href=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2018\/10\/www.nerdiy.de-nodered-kuehlschrankueberwachung-und-alarm-chrome-cuecd9idju-2.png?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"362\" height=\"483\" data-attachment-id=\"8300\" data-permalink=\"https:\/\/nerdiy.de\/nl\/how-to-nodered-frigo-door-monitoring-using-energy-consumption\/chrome-cuecd9idju-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2018\/10\/www.nerdiy.de-nodered-kuehlschrankueberwachung-und-alarm-chrome-cuecd9idju-2.png?fit=362%2C483&amp;ssl=1\" data-orig-size=\"362,483\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"chrome-cUEcd9IdjU-2\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2018\/10\/www.nerdiy.de-nodered-kuehlschrankueberwachung-und-alarm-chrome-cuecd9idju-2.png?fit=225%2C300&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2018\/10\/www.nerdiy.de-nodered-kuehlschrankueberwachung-und-alarm-chrome-cuecd9idju-2.png?fit=362%2C483&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/www.nerdiy.de\/wp-content\/uploads\/2018\/10\/www.nerdiy.de-nodered-kuehlschrankueberwachung-und-alarm-chrome-cuecd9idju-2.png?resize=362%2C483&#038;ssl=1\" alt=\"\" class=\"wp-image-8300\" srcset=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2018\/10\/www.nerdiy.de-nodered-kuehlschrankueberwachung-und-alarm-chrome-cuecd9idju-2.png?w=362&amp;ssl=1 362w, https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2018\/10\/www.nerdiy.de-nodered-kuehlschrankueberwachung-und-alarm-chrome-cuecd9idju-2.png?resize=225%2C300&amp;ssl=1 225w\" sizes=\"auto, (max-width: 362px) 100vw, 362px\" \/><\/a><\/figure><div class=\"wp-block-media-text__content\">\n<p>In het rood gemarkeerde gebied en gemarkeerd met een 1 zie je het verbruik van mijn koelkast met de deur open. Je ziet dat het verbruik vrijwel constant rond de 80 tot 100W ligt. <\/p>\n\n\n\n<p>In hetzelfde gebied is ook een iets donkerder blauwe lijn uitgezet, die het gemiddelde energieverbruik in deze periode weergeeft. <\/p>\n\n\n\n<p>Zoals je daar ook ziet, stijgt het gemiddelde energieverbruik. Helaas heel langzaam. Betrouwbare detectie zou daarom \u00f3f pas heel laat \u00f3f niet erg betrouwbaar mogelijk zijn.<\/p>\n<\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">De oplossing<\/h3>\n\n\n\n<p>Na nog een paar experimenten vond ik een betere manier om de werkcyclus van de koelcompressor te detecteren. Als je het energieverbruik scant op mogelijke randen, kun je vrij betrouwbaar achterhalen wanneer de koelcompressor in- en uitgeschakeld wordt. Zodra u deze twee tijdstippen heeft, weet u ook de looptijd van de koelcompressor.<\/p>\n\n\n\n<p>U kunt nu de inschakeltijd bewaken volgens een soortgelijk principe als hoe u voorheen het energieverbruik bewaakte: Als de koelcompressor aanzienlijk langer ingeschakeld is dan de gemiddelde inschakeltijd, kunt u ervan uitgaan dat dit te wijten is aan een open koelkast deur. <\/p>\n\n\n\n<p>Dieses Verfahren erkennt eine offene K\u00fchlschrankt\u00fcr zwar auch nicht &#8222;direkt&#8220; aber (bei meinem K\u00fchlschrank) immerhin innerhalb 30 bis 45 Minuten. Dies ist ausreichend um mindestens ein paar Lebensmittel vor dem Auftauen zu retten.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Het stopcontact<\/h2>\n\n\n\n<p>Om het energieverbruik van je koelkast te kunnen meten, heb je een stopcontact of een verloopstekker nodig die het actuele energieverbruik van je koelkast naar je smartHome stuurt. Ik heb een WiFi-adapter met energiemeting gebruikt, die ik ook heb geflashed met de Tasmota-firmware. De NodeRed-code ontvangt zijn gegevens vervolgens later via MQTT.<\/p>\n\n\n\n<p>Hoe je een adapterstekker met de Tasmota-firmware kunt flashen en iets beter kunt configureren, wordt deels uitgelegd in het artikel <strong><em><a href=\"https:\/\/nerdiy.de\/nl\/howto-flash-tasmota-firmware-met-tuyaconvert\/\" target=\"_blank\" rel=\"noreferrer noopener\">Tasmota \u2013 Flash-firmware met TuyaConvert<\/a><\/em><\/strong> beschreven.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Wordt weergegeven in het dashboard<\/h2>\n\n\n\n<p>Als u onderstaande NodeCode importeert in uw NodeRed-configuratie, worden de volgende weergaven ook aan uw dashboard toegevoegd.<\/p>\n\n\n\n<div class=\"wp-block-media-text alignwide is-stacked-on-mobile has-light-gray-background-color has-background\"><figure class=\"wp-block-media-text__media\"><a href=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-2qhhl8bp0z.png?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"451\" height=\"683\" data-attachment-id=\"13067\" data-permalink=\"https:\/\/nerdiy.de\/nl\/how-to-nodered-frigo-door-monitoring-using-energy-consumption\/www-nerdiy-de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-2qhhl8bp0z\/\" data-orig-file=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-2qhhl8bp0z.png?fit=451%2C683&amp;ssl=1\" data-orig-size=\"451,683\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-2qhhl8bp0z\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-2qhhl8bp0z.png?fit=198%2C300&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-2qhhl8bp0z.png?fit=451%2C683&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-2qhhl8bp0z.png?resize=451%2C683&#038;ssl=1\" alt=\"\" class=\"wp-image-13067\" srcset=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-2qhhl8bp0z.png?w=451&amp;ssl=1 451w, https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-2qhhl8bp0z.png?resize=198%2C300&amp;ssl=1 198w\" sizes=\"auto, (max-width: 451px) 100vw, 451px\" \/><\/a><\/figure><div class=\"wp-block-media-text__content\">\n<p>In deze weergave ziet u bovenaan een tekstveld waarin wordt aangegeven of er al voldoende meetwaarden zijn om op basis van het gemiddelde verbruik een afwijkende verbruikswaarde te herkennen.<\/p>\n\n\n\n<p>In het midden wordt het verleden en het gemiddelde energieverbruik van uw koelkast weergegeven.<\/p>\n\n\n\n<p>In het onderste gedeelte zijn de inschakelfasen van de koelcompressor, bepaald op basis van het energieverbruik, te zien. De duur wordt in seconden ingevoerd. De huidige, vorige en gemiddelde inschakelduur worden ingevoerd.<\/p>\n<\/div><\/div>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-media-text alignwide is-stacked-on-mobile has-light-gray-background-color has-background\"><figure class=\"wp-block-media-text__media\"><a href=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-j1kksnp5pt.png?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"445\" height=\"816\" data-attachment-id=\"13069\" data-permalink=\"https:\/\/nerdiy.de\/nl\/how-to-nodered-frigo-door-monitoring-using-energy-consumption\/www-nerdiy-de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-j1kksnp5pt\/\" data-orig-file=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-j1kksnp5pt.png?fit=445%2C816&amp;ssl=1\" data-orig-size=\"445,816\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-j1kksnp5pt\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-j1kksnp5pt.png?fit=164%2C300&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-j1kksnp5pt.png?fit=445%2C816&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-j1kksnp5pt.png?resize=445%2C816&#038;ssl=1\" alt=\"\" class=\"wp-image-13069\" srcset=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-j1kksnp5pt.png?w=445&amp;ssl=1 445w, https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-j1kksnp5pt.png?resize=164%2C300&amp;ssl=1 164w\" sizes=\"auto, (max-width: 445px) 100vw, 445px\" \/><\/a><\/figure><div class=\"wp-block-media-text__content\">\n<p>Naast de historische gegevens hierboven ziet u links ook de gegevens.<\/p>\n\n\n\n<p>Bovenaan ziet u het afgelopen gemiddelde verbruik van uw koelkast<\/p>\n\n\n\n<p>In het midden staat het huidige verbruik van uw koelkast<\/p>\n\n\n\n<p>Onderaan wordt de laatst bepaalde inschakelduur van uw koelcompressor weergegeven.<\/p>\n<\/div><\/div>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Knooppuntcode invoegen<\/h2>\n\n\n\n<p>Onderstaande NodeCode bevat alles wat u nodig heeft om het energieverbruik van uw koelkast te evalueren volgens het hierboven beschreven schema en u indien nodig een melding te sturen via Pushbullet. Hoe u NodeCode in uw NodeRed-configuratie kunt invoegen, vindt u in het artikel <em><strong><a href=\"https:\/\/www.nerdiy.de\/wp-admin\/post.php?post=1198&amp;action=edit\">NodeRed - importeer en exporteer knooppuntcode<\/a><\/strong><\/em> beschreven.<\/p>\n\n\n\n<p>Om ervoor te zorgen dat de melding naar u wordt doorgestuurd met behulp van Pushbullet, moet u uiteraard het Pushbullet-knooppunt dienovereenkomstig configureren. Tips hierover vind je in het artikel <strong><em><a rel=\"noreferrer noopener\" href=\"https:\/\/nerdiy.de\/nl\/nodered-pushbullet-verstuur-berichten-bij-gebeurtenissen\/\" target=\"_blank\">NodeRed - Stuur pushbullet-berichten op gebeurtenissen<\/a><\/em><\/strong><\/p>\n\n\n\n<p><strong>Nog wat informatie:<\/strong><br>Het Pushbullet-bericht wordt geactiveerd wanneer de huidige inschakelduur 1,8 keer de gemiddelde inschakelduur is. Dit betekent dat de abnormale inschakelduur pas wordt gedetecteerd nadat 1,8 keer de gemiddelde inschakelduur van de koelcompressor van uw koelkast is verstreken. Bij een gemiddelde inschakeltijd van 30 minuten krijgt u pas na 54 minuten een indicatie van een afwijkende inschakeltijd.<\/p>\n\n\n\n<p>Diesen Wert k\u00f6nnt Ihr nat\u00fcrlich auch verringern. Der einzige Nachteil ist, dass es zu einem &#8222;Fehlalarm&#8220; kommen kann. Wenn ihr wollt probiert doch einfach Mal verschiedene Werte aus. Diese Erkennung ist in der Function Node &#8222;checkForAbnormalValues&#8220; implementiert. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-ghsfcrpril.png?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"810\" height=\"354\" data-attachment-id=\"13029\" data-permalink=\"https:\/\/nerdiy.de\/nl\/how-to-nodered-frigo-door-monitoring-using-energy-consumption\/www-nerdiy-de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-ghsfcrpril\/\" data-orig-file=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-ghsfcrpril.png?fit=1096%2C480&amp;ssl=1\" data-orig-size=\"1096,480\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-ghsfcrpril\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-ghsfcrpril.png?fit=300%2C131&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-ghsfcrpril.png?fit=810%2C354&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-ghsfcrpril.png?resize=810%2C354&#038;ssl=1\" alt=\"\" class=\"wp-image-13029\" srcset=\"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-ghsfcrpril.png?resize=1024%2C448&amp;ssl=1 1024w, https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-ghsfcrpril.png?resize=300%2C131&amp;ssl=1 300w, https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-ghsfcrpril.png?resize=768%2C336&amp;ssl=1 768w, https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-ghsfcrpril.png?resize=600%2C263&amp;ssl=1 600w, https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2020\/11\/www.nerdiy.de-howto-nodered-kuehlschranktuer-ueberwachung-mithilfe-des-energieverbrauchs-chrome-ghsfcrpril.png?w=1096&amp;ssl=1 1096w\" sizes=\"auto, (max-width: 810px) 100vw, 810px\" \/><\/a><\/figure>\n\n\n\n<p>Je vindt de NodeCode in de Nerdiy-Git onder de volgende link:<\/p>\n\n\n\n<p><strong><em><a href=\"https:\/\/github.com\/Nerdiyde\/NodeRedSnippets\/blob\/master\/snippets\/fridge_door_monitoring_by_energy_consumption.json\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/github.com\/Nerdiyde\/NodeRedSnippets\/blob\/master\/snippets\/fridge_door_monitoring_by_energy_consumption.json<\/a><\/em><\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n<h2>Veel plezier met het project<\/h2>\r\n<p>Ik hoop dat alles werkte zoals beschreven. Zo niet, of als je vragen of suggesties hebt, laat het me weten in de commentaren. Ik zal dit dan zo nodig aan het artikel toevoegen.<br \/>Idee\u00ebn voor nieuwe projecten zijn altijd welkom. \ud83d\ude42<\/p>\r\n<p><strong>PS Veel van deze projecten - vooral de hardwareprojecten - kosten veel tijd en geld. Natuurlijk doe ik dit omdat ik het leuk vind, maar als je het cool vindt dat ik de informatie met je deel, dan zou ik blij zijn met een kleine donatie aan het koffiefonds. \ud83d\ude42<\/strong><\/p>\r\n<p><a href=\"https:\/\/ko-fi.com\/nerdiy\" target=\"_blank\" rel=\"noopener\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" style=\"border: 0px; height: 36px;\" src=\"https:\/\/i0.wp.com\/cdn.ko-fi.com\/cdn\/kofi4.png?resize=143%2C36&#038;ssl=1\" alt=\"Koop Me a Coffee op ko-fi.com\" width=\"143\" height=\"36\" border=\"0\" \/><\/a>\u00a0 \u00a0 \u00a0 \u00a0<input name=\"cmd\" type=\"hidden\" value=\"_s-xclick\" \/> <input name=\"hosted_button_id\" type=\"hidden\" value=\"UAZE9RMHJY7VJ\" \/> <input title=\"PayPal - De veiligere, gemakkelijkere manier om online te betalen!\" alt=\"Donate with PayPal button\" name=\"submit\" src=\"https:\/\/www.paypalobjects.com\/de_DE\/DE\/i\/btn\/btn_donateCC_LG.gif\" type=\"image\" \/> <img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/www.paypal.com\/de_DE\/i\/scr\/pixel.gif?resize=1%2C1&#038;ssl=1\" alt=\"\" width=\"1\" height=\"1\" border=\"0\" \/><\/p>","protected":false},"excerpt":{"rendered":"<p>De afgelopen weken had ik vaak het probleem dat de deur van mijn vriezer niet goed sloot. Als gevolg hiervan ging de koelkastdeur op minstens \u00e9\u00e9n nacht bijna zeven uur lang niet open [\u2026]<\/p>","protected":false},"author":1,"featured_media":13029,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"jetpack_post_was_ever_published":false,"_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}},"categories":[149,113,24,61],"tags":[33,114,25,47,329,229,51],"class_list":["post-1950","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-abendprojekt2h","category-node-red","category-raspberry-pi","category-smarthome","tag-automatisierung","tag-nodered","tag-raspberrypi","tag-raspi","tag-sicherheit","tag-smart","tag-smarthome"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - 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