{"id":96333,"date":"2020-10-10T19:42:44","date_gmt":"2020-10-10T17:42:44","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/multisensornyj-besprovodnoj-mikro-diy-datchik"},"modified":"2020-10-10T19:42:44","modified_gmt":"2020-10-10T17:42:44","slug":"multisensornyj-besprovodnoj-mikro-diy-datchik","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/administrirovanie\/multisensornyj-besprovodnoj-mikro-diy-datchik","title":{"rendered":"Multisensor tr\u00e5dl\u00f8s mikro DIY sensor","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

DIY, som Wikipedia siger, har l\u00e6nge v\u00e6ret en subkultur. I denne artikel vil jeg gerne fort\u00e6lle om mit diy-projekt med en lille tr\u00e5dl\u00f8s multisensor, og det vil v\u00e6re mit lille bidrag til denne subkultur. <\/p>\n

Historien bag dette projekt begyndte med et kabinet, det lyder lidt fjollet, men det var pr\u00e6cis s\u00e5dan, projektet startede. Kabinettet blev k\u00f8bt p\u00e5 AliExpress, og jeg m\u00e5 sige, at kvaliteten af plastst\u00f8bet er fremragende. Efter en kort kommunikation med s\u00e6lgeren blev der sendt en tegning via e-mail, og dette projekt begyndte. <\/p>\n

\"Multisensor<\/a><\/noindex>
\n<\/a><\/noindex>
\nSelve tegningen blev meget d\u00e5rligt m\u00e5lt, og halvdelen af m\u00e5lingerne til kanter, udsk\u00e6ringer og teknologiske huller p\u00e5 den fremtidige trykte kreds m\u00e5tte udf\u00f8res med en skydel\u00e6rer. Da jeg fik alle de indvendige m\u00e5l p\u00e5 kabinettet, blev det klart, at radiokredsen m\u00e5tte 'leves' direkte p\u00e5 den trykte kreds, da h\u00f8jden fra toppen af den trykte kreds til den indvendige overflade af kabinettet var 1,8 mm, mens den minimale h\u00f8jde for en gennemsnitlig radiomodul normalt er 2 mm (uden sk\u00e6rm). <\/p>\n

\"Multisensor
\n\"Multisensor
\n\"Multisensor
\nTil sensoren blev SoC nRF52 valgt i QFN48 kabinet. I denne kabinetserie fra nRF52 har Nordic tre varianter: nRF52810, nRF52811 (ny) og nRF52832. Specifikationerne for chipsene: 64 MHz Cortex-M4, 2,4 GHz transceiver, 512\/256 KB Flash, 64\/32 KB RAM for nRF52832 og 192 KB Flash, 24 KB RAM for nRF52810, nRF52811. Chipsene er multiprotokoll\u00e6re og underst\u00f8tter Bluetooth Low Energy, Bluetooth mesh, ESB, ANT, mens nRF52811 desuden underst\u00f8tter Zigbee og Thread samt Bluetooth Direction Finding. <\/p>\n

\"Multisensor
\nJeg besluttede at lave sensoren multisensorisk, s\u00e5 den kunne bruges til forskellige opgaver. Layoutet af chippen skulle af denne grund g\u00f8res s\u00e5 kompakt som muligt, under hensyntagen til at de minimale st\u00f8rrelser af komponenterne ikke m\u00e5tte v\u00e6re mindre end 0603, s\u00e5 enheden kunne loddes manuelt. Efter chippen var ordnet p\u00e5 kredsen, begyndte jeg at v\u00e6lge sensorer. Det prim\u00e6re fokus under valgprocessen var st\u00f8rrelsen p\u00e5 sensors\u00e6kken og muligheden for at lodde sensoren hjemme med et minimalt udstyr (loddekolbe og varmepistol). <\/p>\n

\"Multisensor
\nSensorerne valgt til sensoren er SHT20, SHt21, Si7020, Si7021, HTU21D (temperatur- og fugtsensor), alle disse sensorer har et f\u00e6lles hus og ens benudgange, HDC2080 (temperatur- og fugtsensor) har ogs\u00e5 et lignende hus som de tidligere n\u00e6vnte, men har en ekstra afbryderudgang, som er mere energieffektiv, BME280 (temperatur-, fugtigheds- og tryksensor), LMT01 (temperatursensor), TMP117 (h\u00f8jpr\u00e6cisions temperatursensor), h\u00f8j energieffektivitet, afbryderudgang, indstilling af \u00f8vre og nedre temperaturgr\u00e6nser, LIS2DW12 (accelerometer) h\u00f8j energieffektivitet, en af de bedste i sin klasse eller LIS2DH12. <\/p>\n

\"Multisensor
\n\"Multisensor
\nI den f\u00f8rste version af sensoren var der ogs\u00e5 en reedkontakt p\u00e5 listen, men i de efterf\u00f8lgende revisioner blev den udelukket, da reedkontaktens st\u00f8rrelse p\u00e5 1,6 cm med glasr\u00f8r ikke havde plads, og et par af disse sensorer gik i stykker, da jeg installerede den f\u00e6rdige kreds i huset. Desuden passede den firkantede form af huset og dens lille h\u00f8jde ikke s\u00e6rlig godt til rollen som magnetkontakt til \u00e5bning og lukning. <\/p>\n

\"Multisensor
\nUdover sensorene er der placeret 2 LED'er p\u00e5 sensoren, en af dem er en RGB, der er placeret p\u00e5 den nederste side af sensoren. To SMD-knapper, en til reset, den anden 'brugerdefineret' til implementering af nogle arbejds-scenarier for sensoren. Sensorhuset best\u00e5r af tre dele, hovedkabinettet, en indre indsats med et hul til at holde batteriet, der er fastgjort til hovedkabinettet med fire skruer, og en nederste d\u00e6ksel, der klikker ind i huller p\u00e5 den indre indsats. Derudover er der 4 analoge pins, 2 digitale, samt yderligere to pins, der kan v\u00e6re NFC-antennen eller digitale pins, SWD-port.<\/p>\n

RGB LED'en og knapperne er placeret p\u00e5 PCB-kredsen p\u00e5 en s\u00e5dan m\u00e5de, at der er \u00e5ben adgang til dem, n\u00e5r den nederste d\u00e6ksel er fjernet gennem huller i den indre indsats, som er beregnet til at klikke p\u00e5 bagsiden. <\/p>\n

\"Multisensor
\nEnheden har gennemg\u00e5et to revisioner, tidligere var TMP117-sensoren udskiftet med lysf\u00f8lsomheden MAX44009, som senere blev erstattet med temperatursensoren. Begge sensorer har samme hus, men forskellige benudgange, og det kan v\u00e6re en fejl at erstatte den, det kunne v\u00e6re v\u00e6rd at overveje at vende tilbage. <\/p>\n

\"Multisensor
\n\"Multisensor
\n\"Multisensor
\n\"Multisensor
\nI currently have 4 such devices at home, two of them are temperature and humidity sensors with Si7021 sensors (one on nRF52832, the other on nRF52811), one is an impact sensor implemented on the LIS2DW12 accelerometer (nRF52810), and a temperature control sensor on the LMT01 sensor (nRF52810). <\/p>\n

The wireless sensor operates on a cr2032 battery, with a sleep current of 1.8 \u00b5A for nRF52810, nRF52811 and 3.7 \u00b5A for nRF52832. The current consumption in data transmission mode is 8 mA. <\/p>\n

\"Multisensor
\n\"Multisensor
\nThe description of the protocol used and the software development for this sensor under different usage scenarios is beyond the scope of this article. <\/p>\n

You can view the test of the sensor with the smart home system in a short video below. <\/p>\n

\r\n \"Afspil\r\n
<\/div>\r\n <\/div><\/center>
\nThe project of this sensor is open, and you can access all the materials related to the project on my GitHub<\/a><\/noindex><\/b>. <\/p>\n

If you are interested in anything related to DIY, you are a DIY developer or want to get started, and you are curious about using DIY devices, I invite everyone interested in Telegram chat \u2014 DIYDEV<\/a><\/noindex>.<\/p>\n

To everyone who wants to build devices and start automating their home, I propose to get acquainted with the easy-to-learn Mysensors protocol \u2014 Telegram chat MySensors<\/a><\/noindex><\/p>\n

And for those looking for more mature solutions for home automation, I invite you to the Telegram chat Open Thread<\/a><\/noindex>. (What is Thread?<\/a><\/noindex>)<\/p>\n

Thank you for your attention, take care everyone!<\/p>\n

\"Multisensor<\/a><\/noindex><\/p>\n

\"Multisensor<\/a><\/noindex>
\n
Kilde: habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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