{"id":126,"date":"2017-04-16T09:37:11","date_gmt":"2017-04-16T08:37:11","guid":{"rendered":"http:\/\/www.dbonline.se\/?p=126"},"modified":"2017-04-30T15:34:45","modified_gmt":"2017-04-30T14:34:45","slug":"magick-mirror","status":"publish","type":"post","link":"https:\/\/www.dbonline.se\/index.php\/2017\/04\/16\/magick-mirror\/","title":{"rendered":"Magick mirror"},"content":{"rendered":"

H\u00e4r kommer en guide f\u00f6r att skapa en Magick mirror<\/strong><\/p>\n

Nr 1 – Ramen<\/strong><\/p>\n

K\u00f6p en tavelram och anv\u00e4nd transparent reflekterande folie.
\nAnv\u00e4nd MYCKET vatten n\u00e4r du applicerar filmen.<\/p>\n

\"\"<\/p>\n

 <\/p>\n

Nr 2 – Sk\u00e4rmen<\/strong><\/p>\n

Koppla in en sk\u00e4rm som passar bakom tavelramen.
\nJag k\u00f6pte en\u00a0Adafruit 5″ HDMI-sk\u00e4rm.<\/p>\n

\"\"<\/p>\n

Den tar drivsp\u00e4nning via USB fr\u00e5n raspberry pi, men eftersom jag har kopplat in en Wifi modul s\u00e5 var jag tvungen att s\u00e4nka ljuset p\u00e5 sk\u00e4rmen genom att bryta en koppling (se bild) annars orkade inte USB laddaren f\u00f6r raspberry PI enheten driva b\u00e5da.<\/p>\n

\"\"<\/p>\n

F\u00f6r den h\u00e4r sk\u00e4rmen s\u00e5 \u00e4r det viktigt att sk\u00e4rminst\u00e4llningarna \u00e4r korrekt.
\n\u00f6ppna upp en terminal och skriv in f\u00f6ljande: sudo nano\u00a0\/boot\/config.txt
\n\u00c4ndra f\u00f6ljande i text filen:<\/p>\n

# uncomment if you get no picture on HDMI for a default ”safe” mode
\n<\/span>#hdmi_safe=1
\n<\/span># uncomment this if your display has a black border of unused pixels visible
\n<\/span># and your display can output without overscan
\n<\/span>#disable_overscan=1<\/span>
\n<\/span># uncomment the following to adjust overscan. Use positive numbers if console
\n<\/span># goes off screen, and negative if there is too much border
\n<\/span>#overscan_left=16
\n<\/span>#overscan_right=16
\n<\/span>#overscan_top=16
\n<\/span>#overscan_bottom=16<\/span>\u00a0<\/span><\/p>\n

# uncomment to force a console size. By default it will be display’s size minus
\n<\/span># overscan.
\n<\/span>#framebuffer_width=1280
\n<\/span>#framebuffer_height=720<\/span>\u00a0<\/span><\/p>\n

# uncomment if hdmi display is not detected and composite is being output
\n<\/span>hdmi_force_hotplug<\/span>=<\/span>1
\n<\/span><\/strong># uncomment to force a specific HDMI mode (here we are forcing 800×480!)
\n<\/span>hdmi_group<\/span>=<\/span>2<\/span>
\n<\/span>hdmi_mode<\/span>=<\/span>87
\n<\/span>hdmi_cvt<\/span>=<\/span>800<\/span> 480<\/span> 60<\/span> 6<\/span> 0<\/span> 0<\/span> 0<\/span><\/strong><\/p>\n

# uncomment to force a HDMI mode rather than DVI. This can make audio work in
\n<\/span># DMT (computer monitor) modes
\n<\/span>#hdmi_drive=2<\/span>
\n<\/span># uncomment to increase signal to HDMI, if you have interference, blanking, or
\n<\/span># no display
\n<\/span>#config_hdmi_boost=4<\/span>\u00a0<\/span><\/p>\n

# uncomment for composite PAL
\n<\/span>#sdtv_mode=2<\/span>\u00a0<\/span><\/p>\n

#uncomment to overclock the arm. 700 MHz is the default.
\n<\/span>#arm_freq=800<\/span>\u00a0<\/span><\/p>\n

# for more options see http:\/\/elinux.org\/RPi_config.txt<\/span><\/p>\n

Nr 3 – Vad som ska visas<\/strong><\/p>\n

S\u00e4tt upp milj\u00f6n som ska visas. Kom ih\u00e5g, f\u00f6r b\u00e4st resultat ha en m\u00f6rk bakgrund.
\nJag valde att installera apache2:
\nsudo apt-get install apache2
\njag editerade sedan standardsidan:
\nsudo nano \/var\/www\/html\/index.html
\noch skrev in f\u00f6ljande HTML:<\/p>\n

<!DOCTYPE html>
\n<meta http-equiv=”refresh” content=”60″>
\n<html>
\n<head>
\n<title>Page Title<\/title>
\n<\/head>
\n<body bgcolor=”#000000″>
\n<a href=”https:\/\/www.accuweather.com\/sv\/se\/stockholm\/314929\/weather-forecast\/314929″ class=”aw-widget-legal”>
\n<!–
\nBy accessing and\/or using this code snippet, you agree to AccuWeather\u2019s terms and conditions (in English) which can be found at https:\/\/www.$
\n–>
\n<\/a><div id=”awcc1489784214200″ class=”aw-widget-current” data-locationkey=”314929″ data-unit=”c” data-language=”sv” data-useip=”false” dat$
\n<a href=”https:\/\/www.accuweather.com\/en\/hu\/budapest\/187423\/weather-forecast\/187423″ class=”aw-widget-legal”>
\n<!–
\nBy accessing and\/or using this code snippet, you agree to AccuWeather\u2019s terms and conditions (in English) which can be found at https:\/\/www.$
\n–>
\n<\/a><div id=”awcc1489785729544″ class=”aw-widget-current” data-locationkey=”187423″ data-unit=”c” data-language=”sv” data-useip=”false” dat$
\n<\/body>
\n<\/html><\/p>\n

Jag anv\u00e4nde tv\u00e5 widgets fr\u00e5n accuweather, en f\u00f6r stockholm och en f\u00f6r budapest.
\nApachen startar automatiskt men nu m\u00e5ste allt annat startas automatiskt och visas snyggt.<\/p>\n

Nr 4 – Rensa skrivbordet<\/strong><\/p>\n

F\u00f6r att f\u00e5 bort alla menyer och ikoner installera ”unclutter”
\nsudo apt-get install unclutter<\/p>\n

F\u00f6r att rensa bort det sista som uncluter inte kan ta bort g\u00f6r f\u00f6ljande:<\/p>\n

Editera f\u00f6ljande fil:
\nsudo nano \/home\/pi\/.config\/lxpanel\/LXDE-pi\/panels\/panel
\nH\u00f6gst upp i filen i den ”General” sektionen hittar du f\u00f6ljande:<\/p>\n

autohide=0
\nheightwhenhidden=2<\/p>\n

Byt ut det till:<\/p>\n

autohide=1
\nheightwhenhidden=0<\/p>\n

Nr 5 – Starta per automatik<\/p>\n

F\u00f6r att starta allt per automatik (inklusive unclutter) editera f\u00f6ljande fil:
\nsudo nano \/home\/pi\/.config\/lxsession\/LXDE-pi\/autostart<\/p>\n

@lxpanel –profile LXDE-pi
\n@pcmanfm –desktop –profile LXDE-pi
\n#@xscreensaver -no-splash
\n@point-rpi
\n@unclutter -idle 0.1 -root
\n@chromium-browser –incognito –kiosk http:\/\/localhost\/
\n@unclutter -display :0 -noevents -grab<\/p>\n

F\u00f6rklarning:<\/p>\n

#@xscreensaver -no-splash – St\u00e4nger av sk\u00e4rmsl\u00e4ckaren
\n@chromium-browser –incognito –kiosk http:\/\/localhost\/ – laddar chromium och laddar hemsidan
\n@unclutter -display :0 -noevents -grab – Rensar sk\u00e4rmen<\/p>\n

 <\/p>\n

Nu \u00e4r det klart MEN jag ville ha mer funktionalitet med en r\u00f6relsesensor s\u00e5 sk\u00e4rmen bara aktiveras n\u00e4r n\u00e5gon st\u00e5r framf\u00f6r den.<\/p>\n

\"\"<\/p>\n

Inte det snyggaste, men det fungerar \ud83d\ude42
\nNr 6 – Kopla in r\u00f6relsedetektorn<\/strong><\/p>\n

Jag k\u00f6pte en\u00a0Luxorparts R\u00f6relsedetektor fr\u00e5n kjell och\u00a0company. Kopla in den i Raspbery PI kortet p\u00e5 f\u00f6ljande s\u00e4tt.<\/p>\n

\"\"<\/p>\n

R\u00f6tt \u00e4r 5V f\u00f6r drivsp\u00e4nning
\nBrunt \u00e4r signalsp\u00e4nning
\nSvart \u00e4r jord<\/p>\n

\"\"Dra ner b\u00e5da potentiometrarna till minimum, detta kan du tweeka senare.
\nV\u00e4nster – F\u00f6rdr\u00f6jning (hur l\u00e4nge den skickar ut en signal vid r\u00f6relse)
\nH\u00f6ger – K\u00e4nslighet
\n\"\"<\/p>\n

Nr 7 – Koda funktionaliteten<\/strong><\/p>\n

Instalera x11-xserver-utils p\u00e5 din raspberry
\nsudo apt-get install x11-xserver-utils<\/p>\n

Skapa en fil med namnet pir11.py i PI hemakatalogen (allts\u00e5 d\u00e4r mapparna ”Desktop, Dokuments, Music” mm ligger)
\nsudo nano pir11.py<\/p>\n

Och skriv in f\u00f6ljande kod i filen:<\/p>\n

import RPi.GPIO as GPIO<\/em>
\nimport os, subprocess, time<\/em><\/p>\n

os.environ[’DISPLAY’] = ”:0”<\/em>
\ndisplayison = False<\/em>
\nmaxidle = 2*60 # seconds<\/em>
\nlastsignaled = 0<\/em><\/p>\n

GPIO.setwarnings(False)<\/em>
\nGPIO.setmode(GPIO.BOARD)<\/em>
\nGPIO.setup(11, GPIO.IN) #Read output from PIR motion sensor<\/em>
\nwhile True:<\/em>
\n\u00a0i=GPIO.input(11)<\/em>
\n\u00a0now = time.time()<\/em>
\n\u00a0if i==1: #When output from motion sensor is HIGH<\/em>
\n\u00a0 print (”Movement”),i<\/em>
\n\u00a0 if not displayison:<\/em>
\n\u00a0 \u00a0subprocess.call(’xset dpms force on’, shell=True)<\/em>
\n\u00a0 \u00a0displayison = True<\/em>
\n\u00a0else: #When output from motion sensor is LOW<\/em>
\n\u00a0 print (”No intruders”),i<\/em>
\n\u00a0 if now-lastsignaled > maxidle:<\/em>
\n\u00a0 \u00a0if displayison:<\/em>
\n\u00a0 \u00a0subprocess.call(’xset dpms force off’, shell=True)<\/em>
\n\u00a0 \u00a0displayison = False<\/em>
\ntime.sleep(1)<\/em><\/p>\n

Kontrollera mellanslagen! (Indenteringen). Python anv\u00e4nder dessa f\u00f6r att lista ut hur if-satserna ser ut.<\/strong><\/p>\n

Nu kan du testa att sensorn fungerar genom att k\u00f6ra filen genom att skriva:
\npython pir11.py<\/p>\n

Om du bara f\u00e5r Movement 1 testa att dra ner f\u00f6rdr\u00f6jningen.<\/p>\n

Nu m\u00e5ste bara python scriptet k\u00f6ras per automatik vid uppstart<\/p>\n

\u00c4ndra f\u00f6ljande fil:
\nsudo nano \/home\/pi\/.config\/lxsession\/LXDE-pi\/autostart<\/p>\n

och l\u00e4gg till l\u00e4ngst ner:
\n@sudo python \/home\/pi\/pir11.py<\/p>\n

Nu \u00e4r det bara att starta om och allt ska fungera!<\/p>\n

\"\"<\/p>\n","protected":false},"excerpt":{"rendered":"

H\u00e4r kommer en guide f\u00f6r att skapa en Magick mirror Nr 1 – Ramen K\u00f6p en tavelram och anv\u00e4nd transparent reflekterande folie. Anv\u00e4nd MYCKET vatten n\u00e4r du applicerar filmen.   Nr 2 – Sk\u00e4rmen Koppla in en sk\u00e4rm som passar<\/p>\n","protected":false},"author":1,"featured_media":108,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"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,"enabled":false},"version":2}},"categories":[4,6],"tags":[],"class_list":["post-126","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-it","category-livet"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.dbonline.se\/wp-content\/uploads\/2017\/03\/wp-image-324872595jpg-e1492439846905.jpg?fit=1365%2C1005&ssl=1","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8vDvB-22","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.dbonline.se\/index.php\/wp-json\/wp\/v2\/posts\/126","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dbonline.se\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dbonline.se\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dbonline.se\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dbonline.se\/index.php\/wp-json\/wp\/v2\/comments?post=126"}],"version-history":[{"count":7,"href":"https:\/\/www.dbonline.se\/index.php\/wp-json\/wp\/v2\/posts\/126\/revisions"}],"predecessor-version":[{"id":145,"href":"https:\/\/www.dbonline.se\/index.php\/wp-json\/wp\/v2\/posts\/126\/revisions\/145"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.dbonline.se\/index.php\/wp-json\/wp\/v2\/media\/108"}],"wp:attachment":[{"href":"https:\/\/www.dbonline.se\/index.php\/wp-json\/wp\/v2\/media?parent=126"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dbonline.se\/index.php\/wp-json\/wp\/v2\/categories?post=126"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dbonline.se\/index.php\/wp-json\/wp\/v2\/tags?post=126"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}