Debugging Android USB Host applications
When USB host is enabled in an Android device, it can not be connected to a PC for debugging. Another debugger solution is running ADB over WiFi.
Author Archives: Antanas
Fix: Network not available after hardware change
Symptoms: after changing hardware (motherboard, NIC, virtual machine setup etc.) network connections are no longer available. ifconfig does not list the connections, although the adapters are displayed by ifconfig -a. ifup eth0 returns “Ignoring unknown interface eth0=eth0.”
Convert EPUB to MOBI in command line
The following terminal command will recursively convert .EPUB books in the current directory to Kindle MOBI format. The original files are kept. The ebook-convert program is part of calibre package (in Ubuntu and similar, run sudo apt-get install calibre).
SyncMaster 225BW portrait orientation mod
The Samsung SyncMaster 225BW LCD monitor does not support pivoting. However, modifying the monitor so that it is fixed in portrait mode proved to be very easy. After it is done, the height adjustment of the stand is affected – in its highest position the bottom of the screen bezel is about 87mm from the… Read More »
OpenEmbedded error: Nothing PROVIDES
While writing a new bitbake recipe, I stumbled upon this: The recipe is obviously present, but it can not be found by bitbake. Turns out, this is because of an illegal underscore in the recipe name (directory name too). You should use “-“, underscore is used for version separation
Calculator LCD repair
My 12-year old Casio scientific calculator LCD stopped showing a couple of rows recently. After taking it apart, i found a flexible ribbon cable either glued or soldered to the edge of the PCB. As a first try, I heated the connection a little and it worked. Some slight finger-poking helped to find which part… Read More »
Arduino Ethernet relay
This is just a quick adaptation of the Arduino Ethernet example to control a couple of relays for an automated test setup. I hope the source code is self-explanatory. Beware that Arduino IDE 1.0.1 or later should be used – DHCP in the Ethernet library is buggy in version 1.0. I am using Arduino ADK,… Read More »
IP address not assigned by DHCP if cable is plugged after boot
Symptoms: Boot OpenEmbedded Linux system (probably other distributions as well) with the network cable unplugged. ifconfig shows eth0:avahi interface with a dummy IP address Plug in the Ethernet cable – no changes in ifconfig. I expected DHCP to assign an IP address ifdown eth0 && ifup eth0 solves the problem, but is inconvenient and can… Read More »