Category: raspberry PI

deamon service bash python

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        http://blog.scphillips.com/posts/2013/07/getting-a-python-script-to-run-in-the-background-as-a-service-on-boot/   For some of my projects I write a simple service in Python and need it to start running in the background when the Raspberry Pi boots. Different Linux distributions use different ways of starting and stopping services (some now use Upstart, some systemd). I am using the “Wheezy” Debian distribution on my Raspberry Pi, and in this case the proper way to do this is using an “init script”. These are stored in the /etc/init.d folder. In there you can find scripts that for instance, start the networking system or a print server. Debian Wheezy uses the old Sys V init system which means that these scripts are run according to symbolic links in the /etc/rc.x directories. The Debian documentation explains this. Anyway, the following init script makes getting a Python script (or e.g. a Perl script) to run when the Raspberry Pi boots fairly painless. Services are supposed to run as “daemons” which is quite complicated in Python and involves forking the process twice and other nasty bits. Instead we can make use of the handy start-stop-daemon command to run our script in the background and basically deals with everything we need. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 #!/bin/sh ### BEGIN INIT INFO # Provides: myservice # Required-Start: $remote_fs $syslog # Required-Stop: $remote_fs $syslog # Default-Start: 2 3 4 5 # Default-Stop: 0 1 6 # Short-Description: Put a short description of the service here # Description: Put a…

pwm i2c raspberry pi 2 jessi

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http://www.runeaudio.com/forum/how-to-enable-i2c-t1287.html Re: How to enable I2C by XploD » 21 Jul 2015, 12:45 OK, I finally got it to work, thanks to @hairybiker for his help! So, here are the steps for Raspberry Pi 2: 1) Open /boot/config.txt with: CODE: SELECT ALL nano /boot/config.txt Find this: CODE: SELECT ALL #device_tree_param=i2c_arm=on And uncomment it (remove the # in front of this line). 2) Open /boot/cmdline.txt with: CODE: SELECT ALL nano /boot/cmdline.txt And at the end of the file add this: CODE: SELECT ALL bcm2708.vc_i2c_override=1 3) Open /etc/modules-load.d/raspberrypi.conf with: CODE: SELECT ALL nano /etc/modules-load.d/raspberrypi.conf And add this at the end: CODE: SELECT ALL i2c-bcm2708 i2c-dev Install i2c-tools with: CODE: SELECT ALL pacman -S i2c-tools Turn off your Pi2, connect your I2C device (for example LCD display), turn on your Pi2 and run this: CODE: SELECT ALL i2cdetect -y 1 You should get something like: CODE: SELECT ALL [root@runeaudio ~]# i2cdetect -y 1 0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f 00:          — — — — — — — — — — — — — 10: — — — — — — — — — — — — — — — — 20: — — — — — — — 27 — — — — — — — — 30: — — — — — — — — — — — — — — — — 40: — — — — — — — — — — — — — — — — 50: — — — — — — — — — — — — — — — — 60: — — — — — — — — — — — — — — — — 70: — — — — — — — — You can see my LCD…

WLAN bei zb WL0084B

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sudo nano /etc/wpa_supplicant/wpa_supplicant.conf   Anhängen: network={ ssid=”FRITZ!Box” scan_ssid=1 proto=RSN group=CCMP pairwise=CCMP key_mgmt=WPA-PSK psk=”F8wtJ9PXKBCfta2uK9Z8rh4IM5p9TcU7423AGx1Eg8vPjOrJhU4277OeMOseK38″ } nur dem root rechte geben wegen key?! ls -la /etc/wpa_supplicant/wpa_supplicant.conf -rw——- 1 root root 292 Mär  2 23:09 /etc/wpa_supplicant/wpa_supplicant.conf sudo nano /etc/network/interfaces Standardmäßig sollte diese Konfigurationsdatei wie folgt aussehen. auto lo iface lo inet loopback iface eth0 inet dhcp allow-hotplug wlan0 iface wlan0 inet manual wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf iface default inet dhcp Wenn der Raspberry Pi als WLAN-Client eine IP-Adresse von einem DHCP-Server beziehen soll, ändern Sie diese Konfiguration wie folgt ab. # Loopback device settings auto lo iface lo inet loopback # Wired LAN interface settings iface eth0 inet dhcp # Wireless LAN interface settings allow-hotplug wlan0 iface wlan0 inet dhcp     wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf # Default interface settings iface default inet dhcp Wollen Sie stattdessen dem Raspberry Pi eine statische IP-Adresse in Ihrem Wireless LAN zuweisen, verwenden Sie die folgende Konfiguration und passen die Einstellungen entsprechend an. # Loopback device settings auto lo iface lo inet loopback # Wired LAN interface settings iface eth0 inet dhcp # Wireless LAN interface settings allow-hotplug wlan0 iface wlan0 inet static     address 192.168.10.200     netmask 255.255.255.0     network 192.168.10.0     broadcast 192.168.10.255     gateway 192.168.10.2     dns-nameservers 192.168.10.1 192.168.10.2     dns-search home.lan     wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf # Default interface settings iface default inet dhcp sudo /etc/init.d/networking restart