Mikael O. Bonnier mobluse

Introduction

An introduction to curl using GitHub's API.

The Basics

Makes a basic GET request to the specifed URI

curl https://api.github.com/users/caspyin

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

A Beginner's Guide to Writing Minecraft Plugins: Errata

Introduction

This is list of errors and their corrections that were found after the book was published. This document is a work in progress. If you find additional mistakes in the book please email [email protected].

Chapter 7

Page 84, Listing 7.3

The following code is listed with no explanation of the === operator and how it differs from the == operator which is explained in Chapter 3 (Comparing numbers):

Raspberry Pi Zero OTG Mode

Simple guide for setting up OTG modes on the Raspberry Pi Zero - By Andrew Mulholland (gbaman).

The Raspberry Pi Zero (and model A and A+) support USB On The Go, given the processor is connected directly to the USB port, unlike on the B, B+ or Pi 2 B, which goes via a USB hub.
Because of this, if setup to, the Pi can act as a USB slave instead, providing virtual serial (a terminal), virtual ethernet, virtual mass storage device (pendrive) or even other virtual devices like HID, MIDI, or act as a virtual webcam!
It is important to note that, although the model A and A+ can support being a USB slave, they are missing the ID pin (is tied to ground internally) so are unable to dynamically switch between USB master/slave mode. As such, they default to USB master mode. There is no easy way to change this right now.
It is also important to note, that a USB to UART serial adapter is not needed for any of these guides, as may be documented elsewhere across the int

The included script 'widevine-flash_armhf.sh' fetches a ChromeOS image for ARM and extracts the Widevine binary, saving it in a compressed archive. Since it downloads a fairly large file (2Gb+ on disk after download) it is recommended that you run the script on a machine that has plenty of disk space.

To install the resultant archive, issue the following on your ARM machine–after copying over the archive if needed:

sudo tar Cfx / widevine-flash-20200124_armhf.tgz

(Where 'widevine-flash-20200124_armhf.tgz' is updated to reflect the actual name of the created archive)

ESP32 as Bluetooth Keyboard

With its built-in Bluetooth capabilities, the ESP32 can act as a Bluetooth keyboard. The below code is a minimal example of how to achieve it. It will generate the key strokes for a message whenever a button attached to the ESP32 is pressed.

For the example setup, a momentary button should be connected to pin 2 and to ground. Pin 2 will be configured as an input with pull-up.

In order to receive the message, add the ESP32 as a Bluetooth keyboard of your computer or mobile phone:

Go to your computers/phones settings
Ensure Bluetooth is turned on

Third party apps that run natively on Numworks OS

Emulators:

NoFrendo : Nes Emulator supporting save states
PeanutGB : GameBoy emulator
PeanutGBC : GameBoyColor emulator

Visual Demos:

Mandelbrot : Mandelbrot set explorer
Julia explorer : Julia and Mandelbrot explorer

	sudar@sudar-desktop:~/code/watch/openchronos-ng-modular$ mspdebug rf2500
	MSPDebug version 0.18 - debugging tool for MSP430 MCUs
	Copyright (C) 2009-2011 Daniel Beer <[email protected]>
	This is free software; see the source for copying conditions. There is NO
	warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

	Trying to open interface 1 on 002
	rf2500: warning: can't detach kernel driver: No data available
	Initializing FET...
	FET protocol version is 30001000

	# Source: https://weworkweplay.com/play/rebooting-the-raspberry-pi-when-it-loses-wireless-connection-wifi/
	# Save under /usr/local/bin/checkwifi.sh
	# The Raspberry Pi tends to drop network connection (especially wireless wifi) rather fast, which is a real pain when you're trying to do anything that has the RPi running constantly from a remote location (like our RaspEye does).
	# However, it's possible to detect wifi connection loss and perform upon it. It's easiest to just do a full system reboot.
	# Change the IP on the first line to the IP of your router, or some other device on your network that you can assume will be always online.

	# First step is to ping your IP.

	# On line three, the $? represents the exit code of the previous command, in this case the ping.