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How to OTA update your rooted Nexus. (quickly unroot)

Quite a few posts out there seem to think the only way to accomplish this is to do a factory reset and/or wipe all user data. As Android is moving to a faster release cycle, combined with the new measures to ensure an unaltered installation, this procedure is going to become more used. It might also be possible to flash the latest factory images non-destructively to emulate a OTA, but I'm not 100% sure of this (yet). That is not true, all you will need to do is to revert certain partitions on your phone to stock (boot, recovery and system), and you can do this without wiping apps or user data. This is because of new restrictions in Android Lollipop (for whatever reason) I had to flash a custom boot when 5.0 was released to be able to root my Nexus 5 using SuperSU. And this combined with the modifications this did to my system partition prevented the OTA update from working, resulting in an 'Error!' message during update. All you need to do is to download the orig...

Garage door opener using Arduino + SmartThings

I wired up and controlled my garage (two main doors controlling and one side door sensor only) with the following customizable source code running on an Arduino and the SmartThings platform (via a Z Wave shield. (The .groovy file you load on the web, and the .ino file you compile for the Arduino) These are the materials I used: $35 Smarthings Arduino Z Wave shield $25 Arduino Uno $10 Power supply for Arduino $10 Wire $20 Magnetic switches $8    Relay It was pretty easy, I developed all the source and did the installation in a single day (tweaked it a little the rest of the weekend) and it has been running stable for about 2 years now. The garage doors are toggles that I wired into my garage controller button wires, and they only show if the garage doors are ajar. (It does not indicate whether they are closing or opening... that was troublesome to detect with just a magnetic switch and the way garage doors open and close.) No express or implied warranty are atta...
I've customized my default key bindings on Mac to try and get some conformity amongst my many platforms. I tend to get confused, and these make it easier for me each time I switch around. For one thing, this fixed the Home and End  keys' default behavior. Also tweaked PgUp and PgDown slightly. Then also added shortcuts for the most commonly-used CTRL-<key> variants (like copy and paste). I've added/created the following file: (also creating the directory) ~/Library/KeyBindings/ DefaultKeyBinding.dict With the text content: /* ~/Library/KeyBindings/DefaultKeyBinding.dict */ {       /* Remap Home / End to be correct :-) */       "\UF729"  = "moveToBeginningOfLine:";                   /* Home         */       "\UF72B"  = "moveToEndOfLine:";                         /* End  ...

A quick guide to unlock and root your Nexus on Android 5.X

I've found a lot of instructions on the internet with a lot of very pervasive and superfluous instructions, and wanted one that was the least destructive with the fewest amount of required steps. These are the steps I use for my Nexus 5: Preparation: Firstly, download the latest adb and  fastboot  binaries (latest is best).   Download SuperSU:  http://download. chainfire.eu/supersu   Download ClockworkMod Touch recovery:  https://www. clockworkmod.com/rommanager (Optionally) download the factory images:  https://developers. google.com/android/nexus/ images Your phone needs to be in  fastboot  mode for any  fastboot  command to work... try Power+VolDown at startup for Nexus 5. To unlock: (Will wipe ALL data, you can always lock again without wiping, may also void your warranty)   fastboot  oem unlock To root: 1)  Boot  up your device at least once! (after unlock or factory image...

My first assembly program dating from 1991 (Motorola 68000 for the Amiga 500)

While resurrecting my old Amiga I found and salvaged some of my first programs from the ailing floppy discs. A program written in 1991 for the Amiga 500. I wrote my first hello world program in 1983, but really learnt how to program in 1984. But this was my first assembly language program. It took me about 2 weeks to learn Motorola 68000 Assembly and the tools needed to develop it. I wrote it for a friend who was designing, building and selling hardware for the Amiga at the time. It was a memory expansion cartridge that upgraded to 1MB CHIP internally (and perhaps also extra fast memory, can't recall). The program tested and reported any defective memory chips. A photo of it (still) running: And here is the source code... don't judge too harshly! opt c+,d+ incdir "df0:include/" include exec/exec.i include exec/exec_lib.i include libraries/dos.i include libraries/dos_lib.i lea ...

The story of my Amiga A1200's new lease on life.

Ok, so I rummaged through my storage in South Africa and found my old Amiga once again. This was not the original one I used to have, this is an Amiga A1200, where I used to have the Amiga A500 back in 1986. A bit of history, I started out with a Atari 2600 back in 1983 (was 10 years old at the time), then saw an advertisement for a cartridge that could do programming... this concept fascinated me, but we could never find it anywhere (it was hard finding the good stuff in South Africa). I settled for a VIC-20 soon afterwards (I sold my Atari), then upgraded to a Commodore C64 soon thereafter. This lasted until 1986 (age 13) when, after countless months of pouring over Commodore User magazines, I decided I wanted an Amiga. I had the choice between an IBM compatible XT (with two floppy disc drives but no graphics) or an Amiga. Both seemingly the same price, but due to the then apartheid-era restrictions and taxes, the Amiga turned out to be very troublesome t...

Google Chrome - pt 1

Ok, just downloaded it. So far it looks a lot better out-of-the box than Firefox does. There are some nice improvements over Firefox for which I have been clamoring for to no avail. Firefox is a hog of CPU and Memory, even when having closed all my pages my Macbook Pro uses 14% CPU to power an Idle, minimized Firefox with only the blank window open... what gives? And, alas, my only recourse to try and find out what is taking up the resources is to use a debugger (and then I can only see threads, not tabs)... granted it seems to be Flash that's the culprit, which in turn made me realize why the iPhone never had Flash... Can you imagine!? So what does Google Chrome do for me? (I only compare it to Firefox since IE is a non-event for me) 1) Google Chrome uses the standard proxy settings like IE and Safari and not it's own custom ones like Firefox. This annoys me no-end about Firefox since I constantly have to change my settings in multiple locations when I move around. 2...