Edson Hilios hilios

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

Auto start for Supervisord at AWS

Install commands

$ sudo mv supervisor /etc/init.d
$ sudo chkconfig --add supervisor
$ sudo chkconfig supervisor on

	use std::collections::VecDeque;
	use crate::expr::Expr::*;

	#[derive(Debug, Clone)]
	enum Expr {
	Number(f64),
	Add(Box<Expr>, Box<Expr>),
	Subtract(Box<Expr>, Box<Expr>),
	Divide(Box<Expr>, Box<Expr>),
	Multiply(Box<Expr>, Box<Expr>),

	import kotlin.time.ExperimentalTime
	import kotlin.time.measureTimedValue

	@OptIn(ExperimentalTime::class)
	fun main() {
	val empty = listOf(
	0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0,

	## General
	set number # Show line numbers
	set linebreak # Break lines at word (requires Wrap lines)
	set showbreak=+++ # Wrap-broken line prefix
	set textwidth=100 # Line wrap (number of cols)
	set showmatch # Highlight matching brace
	set spell # Enable spell-checking
	set visualbell # Use visual bell (no beeping)

	set hlsearch # Highlight all search results

	import org.scalatest.{FlatSpec, Matchers}

	import scala.annotation.tailrec

	class FraudioSpec extends FlatSpec with Matchers {

	def maxTickets(tickets: Array[Int]): Int = {
	@tailrec def select(current: Int, max: Int, tickets: Array[Int]): Int = tickets match {
	case Array() => max
	case Array(head, tail@_*) =>

	import cats.data.Kleisli
	import cats.effect.Sync
	import com.google.common.io.BaseEncoding
	import javax.crypto.spec.{IvParameterSpec, PBEKeySpec, SecretKeySpec}
	import javax.crypto.{Cipher, SecretKeyFactory}

	object Hasher {
	type Key = (String, String)

	final case class InvalidInputException(hash: String, ex: Throwable) extends IllegalArgumentException(s"Could not decrypt [$hash]", ex)

	FROM ubuntu:18.04

	EXPOSE 80 443

	COPY ./credentials.json /etc/credentials.json

	RUN apt-get update \
	&& apt-get install -y --no-install-recommends python-setuptools python-pip certbot lighttpd \
	&& pip install -U --no-cache-dir pip certbot certbot-dns-google \
	&& chmod a+rwx,u-x,g-rwx,o-rwx /etc/credentials.json \

	import scala.concurrent.{Await, ExecutionContext, Future, Promise}
	import cats.implicits._

	import scala.concurrent.duration.Duration
	import scala.util.{Failure, Success}

	final case class FutureConcurrentEffect()(implicit ec: ExecutionContext) extends FutureEffect with ConcurrentEffect[Future] {
	def start[A](fa: Future[A]): Future[Fiber[Future, A]] = Future.successful {
	FutureFiber(fa)
	}

	"""
	Get the docker --name from inside a container.

	$ pip install docker
	"""

	import docker
	import subprocess

	client = docker.from_env()