Posts

28 April '21 dzervas

Clear nrf52 saved BT bonds

Often the nRF52 micros get stuck or misbehave and reach a weird state with the pairings. Often the solution is just to clear them so here’s adafruit’s code to do that and a platform.io ini to make it easy.

platformio.ini

[env:clearbonds]
platform = nordicnrf52
board = particle_xenon
framework = arduino

The board can be any nrf52 board, it can be any generic board that uses the same chip that you actually have. For example particle_xenon uses nRF52840, so it can be used for any 52840 board. It might though not flash the correct LEDs, so just hook up the serial port.

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26 January '21 dzervas

Dry your filaments in the drawer

This is a weekend project to keep your filaments safe & dry. It’s very easy to rebuild and adapt to your needs with (hopefully) available spare parts.

After a long term abusive relationship with the 3D printing hobby, where I was brutally murdered several times as described here, it was finally time to find a good partner and settle down. I bought the Original Prusa MK3S. I can finally print dickbutts using plastic. The printer just works, there’s nothing more to add.

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07 October '20 dzervas

Things that went wrong with my Ender 3

Why is it that hard to 3D print across years? Why can’t I have consistent printing experience, while not spending a kidney? I don’t get it. Why is the machine constantly failing? I’m a computer guy, I know that human errors are all over the place but how does a machine break on its own so frequently. And don’t get me wrong, it might be a budget Creality Ender 3 but it’s proven to be a good machine and its components are not majestic. This is me… sad…

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04 October '20 dzervas

Rusty Arduino bindings using PlatformIO

Oh Rust, how much I love you… Love at first third sight, like I had with my English teacher. She was ugly but I was 10 and she was a female that stood near me for an hour and talked to me in a soothing voice. That’s what Rust is, ugly but it’s there for you with a soothing voice.

On the other side we have C++ that the Arduino Framework is written on. Classes here and there, mixed with C, requiring a 3 day workshop to understand what’s the “standard” way of blinking a LED - hence the headache of each Arduino library taking the matters on their own hands. I hate reading C++ by the way and don’t know how to write it. That’s why I want to just forget about it and just call it from Rust.

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27 May '20 dzervas

Adding more magic to the Magicforce 68

This is a small journey on how I reverse engineered the MagicForce 68 keyboard and tried to add bluetooth functionality to it. It’s a small keyboard (68 keys, 65%) and is USB-only (it’s not the smart model). It has a controller that I can’t flash with a custom firmware, so I had to hook wires on it.

The Hardware

The first step in determining what I was against, was to at least partially disassemble the keyboard.

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