{"id":1589,"date":"2020-02-04T08:52:37","date_gmt":"2020-02-04T07:52:37","guid":{"rendered":"http:\/\/www.xpablo.cz\/?p=1589"},"modified":"2022-02-07T16:23:06","modified_gmt":"2022-02-07T15:23:06","slug":"doma-navrzeny-nest-termostat-no-proc-ne","status":"publish","type":"post","link":"https:\/\/www.xpablo.cz\/?p=1589","title":{"rendered":"Doma navr\u017een\u00fd Nest termostat? – No pro\u010d ne"},"content":{"rendered":"

\"\"<\/a>Moje nejstar\u0161\u00ed dcera bydl\u00ed v byt\u011b, kter\u00fd jsme rekonstruovali. Sou\u010d\u00e1st\u00ed rekonstrukce byla i v\u00fdm\u011bna kotle za modern\u011bj\u0161\u00ed, ale z d\u016fvod\u016f ceny z\u016fstal zachovan\u00fd p\u016fvodn\u00ed termostat, kter\u00fd sice pln\u00ed z\u00e1kladn\u00ed funkci termostatu, ale s nikterak velk\u00fdm komfortem. Napadlo m\u011b tedy, \u017ee by bylo zaj\u00edmav\u00e9 zkonstruovat termostat vlastn\u00ed s mo\u017enost\u00ed propojen\u00ed s p\u0159\u00edpadnou budouc\u00ed dom\u00e1c\u00ed automatizac\u00ed. Dal\u0161\u00ed \u00favaha pak byla, \u017ee kdy\u017e u\u017e budu vyv\u00edjet takov\u00e9 za\u0159\u00edzen\u00ed, tak by si zaslou\u017eilo i reprezentativn\u00ed vzhled. No a proto\u017ee m\u016fj syn a nejmlad\u0161\u00ed dcera maj\u00ed ve sv\u00fdch bytech kotle Baxi, zat\u00edmco nejstar\u0161\u00ed dcera m\u00e1 Junkers, napadlo m\u011b, \u017ee by bylo pr\u00edma, kdyby temostat dok\u00e1zal komunikovat s ob\u011bma typy p\u0159es jejich nativn\u00ed sb\u011brnice…<\/p>\n

Jako n\u00e1m\u011bt pro vzhled a jednoduchost ovl\u00e1d\u00e1n\u00ed jsem vybral Nest termostat, kter\u00fd se mi v\u017edycky hodn\u011b l\u00edbil, ale probl\u00e9mem byla mechanick\u00e1 konstrukce krabi\u010dky. Na\u0161t\u011bst\u00ed jsem objevil (tehdej\u0161\u00ed) novinku od firmy Italtronic<\/a>, kter\u00e1 za\u010dala nab\u00edzet prakticky vzhledov\u011b identick\u00e9 krabi\u010dky EYEBox \"\"<\/a> a objevil jsem, \u017ee zastoupen\u00ed pro \u010ceskou republiku m\u00e1 firma Enika<\/a>.Objednal jsem tedy d\u00edly stavebnice krabi\u010dky a Italtronic po\u017e\u00e1dal o poskytnut\u00ed mechanick\u00fdch v\u00fdkres\u016f a 3D model\u016f pro konstrukci. 3D modely jsem sice nedostal, proto\u017ee pr\u00fd nejsem firma, ale v\u00fdkresy pro jednotliv\u00e9 varianty ano, tak\u017ee jsem mohl za\u010d\u00edt s designem.<\/p>\n

Bohu\u017eel se ale velmi brzy uk\u00e1zal probl\u00e9m – d\u00edky omezen\u00e9 dostupnosti sortimentu variant krabi\u010dky jsem nemohl m\u00edt verzi s m\u0159\u00ed\u017ekou, nebo otvory pro p\u0159\u00edvod vzduchu k \u010didlu teploty, tak\u017ee jsem musel vymyslet n\u011bjak\u00e9 jin\u00e9 \u0159e\u0161en\u00ed m\u011b\u0159en\u00ed. Nakonec jsem p\u0159i\u0161el s n\u00e1sleduj\u00edc\u00ed filozofi\u00ed, kter\u00e1 pak ur\u010dila v\u00fdslednou podobu elektoniky:<\/p>\n

T\u011bleso termostatu neobsahuje \u010didlo teploty<\/strong> – v\u00edm, je to divn\u00e9 a ve sch\u00e9matu n\u011bjak\u00e9 \u010didlo teploty z\u016fstalo, ale ve skute\u010dnosti nen\u00ed ani osazen\u00e9. Termostat pro z\u00edsk\u00e1v\u00e1n\u00ed teploty pou\u017e\u00edv\u00e1 bu\u010f Bluetooth senzory Xiaomi Mijia<\/a> \"\"<\/a> , nebo teploty, z\u00edskan\u00e9 z Bluetooth hlavic RT2000BT\"\"<\/a> z L\u00eddlu (bohu\u017eel u\u017e vyprodan\u00e9), nebo z levn\u00fdch 433MHz \u010didel z \u010c\u00edny. Tahle zm\u011bna paradigmatu ohledn\u011b cel\u00e9ho syst\u00e9mu termostatu vy\u0159e\u0161\u00ed i po\u017eadavek na centr\u00e1ln\u00ed \u0159\u00edzen\u00ed v\u0161ech radi\u00e1tor\u016f a umo\u017en\u00ed termostatu \u0159\u00eddit kotel dle po\u017eadavk\u016f na teplo z ka\u017ed\u00e9 m\u00edstnosti a ne jen jedn\u00e9, referen\u010dn\u00ed. Takov\u00e9to schopnosti u\u017e origin\u00e1ln\u00ed Nest nem\u00e1.<\/p>\n

Tedy zp\u011bt ke konstrukci elektroniky. Vzhledem k pou\u017eit\u00ed grafick\u00e9ho LCD a Bluetooth komunikace nebude mo\u017en\u00e9 pou\u017e\u00edt ESP8266, ale je t\u0159eba s\u00e1hnout po n\u011b\u010dem v\u00fdkonn\u011bj\u0161\u00edm – volba padla na ESP32, se kter\u00fdm u\u017e p\u00e1r projekt\u016f m\u00e1m za sebou. Proto\u017ee grafick\u00e9 operace jsou hodn\u011b n\u00e1ro\u010dn\u00e9 na pam\u011b\u0165 RAM a tak\u00e9 proto, \u017ee Bluetooth knihovny do ESP32 jsou notoricky zn\u00e1m\u00e9 svoj\u00ed velikost\u00ed, vybral jsem jako z\u00e1klad modul ESP32Wrover-B 16MB, kter\u00fd ke vnit\u0159n\u00ed RAM obvodu ESP32 p\u0159id\u00e1v\u00e1 nav\u00edc 4MB PSRAM a je osazen\u00fd 16MB pam\u011bti Flash. Elektroniku bylo – vzhledem ke konstrukci krabi\u010dky – t\u0159eba rozd\u011blit na dv\u011b \u010d\u00e1sti. Na horn\u00ed desce je LCD, ESP32, SD karta (pro str\u00fd\u010dka P\u0159\u00edhodu), laserov\u00fd d\u00e1lkom\u011br VL53L0x, kter\u00fd pou\u017e\u00edv\u00e1m jako detektor, \u017ee p\u0159ed termostatem n\u011bkdo stoj\u00ed (\u0159\u00edzen\u00ed podsv\u00edcen\u00ed LCD), audio zesilova\u010d a r\u00e1diov\u00e9 moduly. Sch\u00e9ma vypad\u00e1 takto:\"\"<\/a>a osazen\u00e1 deska pak takto:\"\"<\/a>Na spodn\u00ed desce pak je nap\u00e1jec\u00ed zdroj, rota\u010dn\u00ed enkod\u00e9r, tla\u010d\u00edtka, obvody pro rozhran\u00ed ke kotli EMS (Buderus\/Nefit\/Junkers), OpenTherm (Baxi) a rel\u00e9 (pro oby\u010dejn\u00e9\/star\u0161\u00ed kotle). Sch\u00e9ma vypad\u00e1 takto:\"\"<\/a>A osazen\u00e1 deska pak takto:\"\"<\/a>Ob\u011b desky p\u0159ed mont\u00e1\u017e\u00ed ant\u00e9n pak vypadaj\u00ed takto:\"\"<\/a>Po mont\u00e1\u017ei 433MHz r\u00e1dia a ant\u00e9n pro 433 a 868MHz u\u017e ve spodn\u00ed \u010d\u00e1sti krabi\u010dky moc prostoru nezb\u00fdv\u00e1.\"\"<\/a>Instalace do krabi\u010dky a sesazen\u00ed obou desek na mezideskov\u00e9m konektoru \u0161lo naprosto bez probl\u00e9mu, tak\u017ee mus\u00edm Italtronic pochv\u00e1lit za p\u0159esn\u00e9 v\u00fdkresy. Probl\u00e9m ov\u0161em byl, jak krabi\u010dku p\u0159ekr\u00fdt, proto\u017ee (jak u\u017e jsem psal) d\u00edky omezen\u00e9 dostupnosti jsem koupil kryc\u00ed skl\u00ed\u010dko cel\u00e9 \u010dir\u00e9. Prvn\u00ed pokus byl se samolep\u00edc\u00ed f\u00f3li\u00ed, kter\u00fd nedopadl p\u0159\u00edli\u0161 dob\u0159e. \"\"<\/a>Pro zaj\u00edmavost – na fotografii je kr\u00e1sn\u011b patrn\u00fd pracuj\u00edc\u00ed d\u00e1lkom\u011br. Na\u0161t\u011bst\u00ed mi v Enice nab\u00eddli potisk skl\u00ed\u010dka dle zad\u00e1n\u00ed, tak\u017ee v\u00fdsledek pak vypadal podstatn\u011b l\u00e9pe.\"\"<\/a> P\u0159esto jsem se ale neubr\u00e1nil chyb\u00e1m – FPC kabel z LCD modulu je vyosen\u00fd o cca 1mm (co\u017e sice nijak nevad\u00ed, ale m\u011b to \u0161tve) a footprint ak\u010dn\u00edho tla\u010d\u00edtka m\u00e1 prohozen\u00e9 v\u00fdvody, tak\u017ee jsem musel \u0161kr\u00e1bat a p\u0159epojit jednu cestu. Jinak je ale v\u0161e, co zat\u00edm bylo t\u0159eba pou\u017e\u00edt funk\u010dn\u00ed, tak\u017ee s hardware jsem spokojen\u00fd. No a o software snad n\u011bkdy p\u0159\u00ed\u0161t\u011b, proto\u017ee s t\u00edm moc spokojen\u00fd nejsem (ale to jen proto, \u017ee nem\u00e1m tolik \u010dasu, abych se mu mohl v\u011bnovat a vyu\u017e\u00edt cel\u00e9ho potenci\u00e1lu t\u00e9to konstrukce…).<\/p>\n","protected":false},"excerpt":{"rendered":"

Moje nejstar\u0161\u00ed dcera bydl\u00ed v byt\u011b, kter\u00fd jsme rekonstruovali. Sou\u010d\u00e1st\u00ed rekonstrukce byla i v\u00fdm\u011bna kotle za modern\u011bj\u0161\u00ed, ale z d\u016fvod\u016f ceny z\u016fstal zachovan\u00fd p\u016fvodn\u00ed termostat, kter\u00fd sice pln\u00ed z\u00e1kladn\u00ed funkci termostatu, ale s nikterak velk\u00fdm komfortem. Napadlo m\u011b tedy, \u017ee by bylo zaj\u00edmav\u00e9 zkonstruovat termostat vlastn\u00ed s mo\u017enost\u00ed propojen\u00ed s p\u0159\u00edpadnou budouc\u00ed dom\u00e1c\u00ed automatizac\u00ed. Dal\u0161\u00ed … Pokra\u010dov\u00e1n\u00ed textu Doma navr\u017een\u00fd Nest termostat? – No pro\u010d ne<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[5,83],"tags":[84,86],"class_list":["post-1589","post","type-post","status-publish","format-standard","hentry","category-elektronika","category-esp32","tag-esp32","tag-kicad"],"_links":{"self":[{"href":"https:\/\/www.xpablo.cz\/index.php?rest_route=\/wp\/v2\/posts\/1589","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xpablo.cz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xpablo.cz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xpablo.cz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xpablo.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1589"}],"version-history":[{"count":22,"href":"https:\/\/www.xpablo.cz\/index.php?rest_route=\/wp\/v2\/posts\/1589\/revisions"}],"predecessor-version":[{"id":1690,"href":"https:\/\/www.xpablo.cz\/index.php?rest_route=\/wp\/v2\/posts\/1589\/revisions\/1690"}],"wp:attachment":[{"href":"https:\/\/www.xpablo.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1589"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xpablo.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1589"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xpablo.cz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1589"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}