Windows CE Programming

itead hat mit dem sonoff Modul einen sehr günstigen ESP-8266 basierten WLAN Stromschalter im Programm. Kostet derzeit bei itead unter 5$, allerdings mit ca. 8$ Versand. Wenn man aber gleich vier davon bestellt, lohnt sich das gegenüber anderen China-Versendern, die diese Modul für ca. 10$ verkaufen.

Das Ding lässt sich wunderbar mit einer eigenen Firmware flashen, wenn man einen 4-Pin Header einlötet und einen USB-TTL Konverter mit 3.3V hat.

Continue reading ‘fhem: Lampe (220V) mit sonoff über WiFi schalten’ »

Last week I got my rtl-sdr usb dongle by http://www.rtl-sdr.com/buy-rtl-sdr-dvb-t-dongles/. I ordered the “RTL-SDR Blog R820T2 RTL2832U 1PPM TCXO SMA Software Defined Radio with 2x Telescopic Antennas”.

Installation of the driver on the Debian Jessie system worked flawless I also first insalled and tested on a Raspberry Pi 2 B without hassles. But as I wanted to use the dongle alos as a radio scanner, I went over two the larger system.

After trying different Linux compatible software for Radio reception I went over to ADS reception. First I started with dump1090, which runs fine without any problems but I missed the flightradar24.com similar display on a google map and airplane details. So I tried ADSbox. After getting the sqlite3 source and placing it nearby the adsbox directory, the compilation went fine and I now can watch some airplanes around my location.

and, some time later (therefor different planes):

Please know that the noise made by these airplanes is loud, even if they are 30000ft high and some kilometres away.

Now, I know which planes are there making the noise and where they are. Frustrating…I can not do anything against the noise but going indoor.

Um alle Batterien von Sensoren in einer Gruppe anzuzeigen habe ich folgendes in meiner fhem.cfg:

#Batteriestatus aller Devices im Raum Zentral anzeigen
define ZE.Batterie readingsGroup .*:[Bb]attery\
.*:[Bb]atteryLevel
attr ZE.Batterie notime 1
attr ZE.Batterie room Zentral
attr ZE.Batterie valueFormat {return "0" if( $VALUE eq "low" );; return "100" if( $VALUE eq "ok" );; return "25" if( $VALUE < 2.1 );; return "50" if( $VALUE < 2.3 );; return "75" if( $VALUE < 2.5 );; return "100"}
attr ZE.Batterie valueIcon {'battery.0' => 'measure_battery_0@red','battery.100' => 'measure_battery_100@green','Battery.0' => 'measure_battery_0@red','Battery.100' => 'measure_battery_100@green','batteryLevel.0' => 'measure_battery_0@red','batteryLevel.25' => 'measure_battery_25@red','batteryLevel.50' => 'measure_battery_50@orange','batteryLevel.75' => 'measure_battery_75@green','batteryLevel.100' => 'measure_battery_100@green'}

Hier möchte ich nur kurz meine logrotate configuration festhalten:

hgode@atom2:~$ cat /etc/logrotate.d/fhem 
/opt/fhem/log/fhem.log {
    missingok
    weekly
    copytruncate
    rotate 5
    compress
    postrotate
       /etc/init.d/fhem restart
    endscript
}

Wichtig ist, dass die Anweisung in postrotate/endscript keinen Fehler zurückmlden. Dann läuft das logrotate nämlich gar nicht!