Ladvien's Lab

Earlier in this article series I showed how to install NodeJS -- it was pretty simple with an install script. However, I thought I better show how I actually worked with NodeJS to create my little 1b1 driver code.

Again, simple, I used others hard work. Specifically, Michael Hord with Sparkfun's MiniMoto library.

• MiniMoto Arduino Library

Really, all I did was tweak the code a little bit to fit JavaScript syntax.

The result

'use strict';
var i2c = require('i2c-bus');
var sleep = require('sleep');

// Commands
const FAULT_CMD         = 0x01;

// Fault constants
const CLEAR_FAULT       = 0x80;
const FAULT             = 0x01;
const ILIMIT            = 0x10;
const OTS               = 0x08 ...

I'm spoiled. I love the pretty colors of modern text IDEs. My favorite among them being Visual Studio Code.

• 1. Get Visual Studio Code

I know it'll engender a lot of bad rep with the old-timers, but I prefer the one on the right.

However, when working on a headless (no monitor) Raspberry Pi it felt like I was pretty much stuck with the nano .

Until! I discovered Visual Studio Code's remote extension.

• Visual Studio Code Remote Extension

This allowed me to edit my Raspberry Pi files from within Visual Studio Code. So, I get all the joys of writing ...

Recently I was required to work with MySQL 10.0. I was surprised to find MySQL 10.2 and less does not support some common Windowing Functions , specifically, Value Functions and Rank Functions .

Well, bummer. I really needed them.

On top of it, I only had read access to the database without the ability to create a stored procedure. Out of desperation, I found myself researching the possibility of creating my own functions using MySQL User Variables .

Slightly tweaking Dante, "Abandon all normal, ye who enter here." User variables are weird.

I've spent some time researching on the interweb and ...

This article builds on the previous, where I ran us through setting up Arch Linux for the Raspberry Pi Zero W.

Let's not stop, let's get I2C going so we can interact with some cool hardware.

1. Installing sudo

If you've followed my previous guide on installing Arch Linux on a Raspberry Pi then you'll have ended up with a bare bones system, which is good. No unneeded fat. But sometimes fat is needed, it's what gives us curves, and curves are beautiful....I feel this metaphor is breaking down. In short, we need extra packages to get work done ...

Disclaimer: The easiest way to setup an SD card with Arch Linux for the Raspberry Pi Zero W (rp0w) is using Linux--and the following guide will assume you have access to Linux somewhere. For Mac and Windows users, it is possible to setup an SD card using Linux inside of a virtual machine. The interwebs will have more on the subject.

The hardest part of setting up Arch Linux for the rp0w is getting the WiFi working on boot. This allows accessing the OS through ssh immediately. This is known as a "headless setup." I've created instructions on doing something ...

Lumi5 -- AVR / Arduino Wireless Uploader

This article will focus on setting up the Bluetooth 4.0 module, preparing the uploader, and uploading sketches over Bluetooth 4.0

Prerequisites:

This article builds off:

Upload Arduino Sketches to ATtiny85 with UART

The above article will need to be followed to prepare your ATtiny85 and Windows computer.

1. ATtiny85 (or any ATtiny or ATmega chip)
2. Arduino Uno (or compatible, this will be used once to burn the bootloader to the ATtiny85).
3. FTDI (or compatible UART).
4. Lumi (a browser based uploader for TinySafeBoot).
5. Arduino IDE
6. AVRDUDE
7. HM-10 or HM-11 Breakout *
8. 1k Resistor
9. Soldering iron

*Note ...

Upload Arduino Sketches to ATtiny85 With UART This article will show you how use a two-wire interface (UART) to upload Arduino sketches to the ATtiny85. In short, we will burn the TinySafeBootloader onto the ATtiny85 using an Arduino Uno as an ISP programmer . After the initial burning of the bootloader, we can then program the ATtiny85 with any FTDI compatible USB-to-UART. And very similar steps may be followed to do the same for an ATtiny84.

There are a few requirements and a lot of setup needed:

Prerequisites:

• ATtiny85 / 84, or ATmega328P
• Windows 10
• Arduino Uno (or compatible, this will be ...