Mobile


Nexus 7 – install old android version

Our Nexus 7 (first version) was super slow since it was updated to android version 5.x so I decided to install version 4.4.4 which is the latest version before version 5. I tried to downgrade by the instructions supported by Google but it did not work and I have to call some additional commands. See solution section. Hopefully the tablet is a little bit faster with version 4.4.4. Before I started I have to enable USB-Debuging in the Developertools on my device. Link to the Google factory images: https://developers.google.com/android/images#instructions Problem I called the following command as recommended in the instructions: ./flash-all.sh Result (quite […]


Syncing images from android smartphone to raspberry pi

I was looking for a solution to backup the photos taken with my smartphone to our raspberry pi. Android side I searched for synchronization apps and ended up using rsync as backup tool. Therefore I installed the app ‘Rsync Wrapper‘ on my smartphone and configured it with the following parameters: Source: /storage/9C33-6BBD/DCIM/Camera/ Destination: martin@192.168.2.106:~/photos/handy-samsung-s7/ Option: -r –ignore-existing –progress -e “ssh -l martin -i /data/user/0/net.letscorp.rsyncwrapper/files/06a73f67-6234-40e7-81de-7add8fa4c783.key -y” I removed the –verbose parameter and added the –ignore-existing parameter. The –ignore-existing parameter was added by me because the synchronization took up to twenty minutes where the most of the time was used to check which files are […]


Install OpenAndroMaps on OruxMaps via PC

I tried to install maps from OpenAndroMaps on OruxMaps on my SmartPhone (Samsung Galaxy S7). At first I tried the recommended way on the website of OpenAndroMaps and used the direct download and installation via my smart phone. I selected the “Install on Oruxmaps” option and the download started but it seemed that my phone could not unzip the downloaded archive within one day (8 hours). So I downloaded the map-file (zip) to my pc and unpacked it there which results in a file called Germany.map which is approximately 2.7GB big. I copied the map-file to my phone connected to my pc via […]