{"id":456,"date":"2013-06-29T20:22:24","date_gmt":"2013-06-29T18:22:24","guid":{"rendered":"http:\/\/www.jensd.de\/wordpress\/?p=456"},"modified":"2015-02-10T09:12:51","modified_gmt":"2015-02-10T08:12:51","slug":"raspi-does-the-home-automation-part-i-setup-the-pi","status":"publish","type":"post","link":"https:\/\/www.jensd.de\/wordpress\/?p=456","title":{"rendered":"RasPi does the Home Automation (Part I): Setting up the Pi"},"content":{"rendered":"

Hi all,<\/p>\n

it’s some time ago since my last post as I was very busy due to other projects.
\nBut I still intent to control my wireless power outlets with the Raspberry.<\/p>\n

The hardware<\/strong><\/p>\n

In the meantime the receiver\/transmitter components arrived from Hong Kong (took some weeks, but 8\u20ac (incl. shipping!) for 5 pairs of receiver\/transmitter is quite unbeatable ;-)):<\/p>\n

\"DSC_5210\"<\/a><\/p>\n

Next: connect the transmitter to PIN 0, +5V and GND:<\/p>\n

\"DSC_5214\"<\/a><\/p>\n

The software<\/strong><\/p>\n

To “talk” to the radio-controlled sockets you have to send serial data to a generic GPIO pin to be send by the transmitter, keyword: “bit-banging”<\/a>.<\/p>\n

Sadly by now Pi4J<\/a> does not include any bit-banging techniques or built in support. Anyway bit-banging in Java may not be the best solution since timing cannot be guaranteed. (Thanks to Robert Savage<\/a> from Pi4J<\/a> for support) <\/p>\n

OK then, down-to-earth: install required stuff on the Rasperry<\/strong><\/p>\n

    \n
  1. GPIO access library: wiringpi<\/a><\/li>\n
  2. and the RaspPi adaption of RCSwitch<\/a> (Arduino): rcswitch-pi<\/a><\/li>\n<\/ol>\n

    Then I replaced send.cpp<\/code> from rcswitch-pi by my own version:<\/p>\n

    [cpp]<\/p>\n

    #include “RCSwitch.h”
    \n#include
    \n#include <\/p>\n

    int main(int argc, char *argv[])
    \n{
    \n int PIN = 0;<\/p>\n

    if (wiringPiSetup() == -1) return 1;
    \n RCSwitch mySwitch = RCSwitch();
    \n mySwitch.enableTransmit(PIN);<\/p>\n

    if (argc==5)
    \n {
    \n char* houseCode = argv[1];
    \n int group = atoi(argv[2]);
    \n int device = atoi(argv[3]);
    \n int command = atoi(argv[4]);
    \n printf(“sending: houseCode:%c group:%i device:%i command: %i\\n”, houseCode[0], group, device, command);
    \n switch(command) {
    \n case 1:
    \n mySwitch.switchOn(houseCode[0], group, device);
    \n break;
    \n case 0:
    \n mySwitch.switchOff(houseCode[0], group, device);
    \n break;
    \n default:
    \n printf(“command[%i] is unsupported\\n”, command);
    \n return -1;
    \n }
    \n }
    \n else
    \n {
    \n printf(” Usage: .\/send \\n”);
    \n printf(” Command is 0 for OFF and 1 for ON\\n”);
    \n }<\/p>\n

    return 0;
    \n}<\/p>\n

    [\/cpp]<\/p>\n

    For convenience, I allow send<\/code> to run as root:
    \n
    \nsudo chown root .\/send
    \nsudo chmod 4711 .\/send
    \n<\/code><\/p>\n

    My Intertechno devices can now be controlled from the prompt with my “send”-command:<\/p>\n

    .\/send [houseCode] [group] [device] [command]<\/code> <\/p>\n

    Here we go:<\/strong>
    \n
    \npi@raspberrypi ~\/rcswitch-pi $ .\/send a 1 3 1
    \nsending: houseCode:a group:1 device:3 command: 1
    \npi@raspberrypi ~\/rcswitch-pi $
    \n<\/code><\/p>\n

    And the fountain in the garden ripples…<\/p>\n

    Next: “I need a UI” or Crossing the bridge to JavaFX<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

    Hi all, it’s some time ago since my last post as I was very busy due to other projects. But I still intent to control my wireless power outlets with the Raspberry. The hardware In the meantime the receiver\/transmitter components arrived from Hong Kong (took some weeks, but 8\u20ac (incl. shipping!) for 5 pairs of… <\/span>Continue Reading RasPi does the Home Automation (Part I): Setting up the Pi<\/span><\/i><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"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,"footnotes":"","_jetpack_memberships_contains_paid_content":false,"jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false},"version":2}},"categories":[21,22,30,4,18],"tags":[87,88,91,76,86],"jetpack_publicize_connections":[],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p38FCL-7m","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.jensd.de\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/456"}],"collection":[{"href":"https:\/\/www.jensd.de\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jensd.de\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jensd.de\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jensd.de\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=456"}],"version-history":[{"count":46,"href":"https:\/\/www.jensd.de\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/456\/revisions"}],"predecessor-version":[{"id":1930,"href":"https:\/\/www.jensd.de\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/456\/revisions\/1930"}],"wp:attachment":[{"href":"https:\/\/www.jensd.de\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=456"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jensd.de\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=456"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jensd.de\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=456"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}