Brian O'Connor btoconnor

Bluetooth LE Programming On Raspberry Pi

I'm looking at building up some Bluetooth LE programming expertise on Linux, specifically for use with Raspberry Pi 3 B+ and Pi Zero W models.

This is a compendium of libraries and tools that I'm looking at to build that skill on.

DON'T FORGET!!!

On the Raspberry Pi Zero W, a user must be a member of the bluetooth group to work with tools like bluetoothctl. Set this up with:

How to upgrade a Heroku PostgreSQL database to a new plan

I started a project on a Hobby Dev plan (free, limit 10,000 rows), and then later needed to upgrade it to Hobby Basic ($9/month, limit 10,000,000 rows).

After assigning the new database, I had two databases attached to the application. They looked something like this:

HEROKU_POSTGRESQL_OLIVE (postgresql-dimensional-3321) Old, free-tier (Hobby Dev) database

	#!/usr/bin/env bash
	#
	# Author: postmodern
	# Description:
	# Rips a DVD to a H.264 MKV file, with chapters and tags. Ignores any
	# bad blocks or sectors on the DVD.
	# Dependencies:
	# * gddrescue
	# * handbrake-cli
	# * mkvtoolnix

	# DOCKER-VERSION 0.6.1
	# Borrowed from https://github.com/vvlad/dockerfiles-postgresql-9.3
	#
	# First run:
	# $ docker build -t uwsgi -rm=true .
	# $ ID=$(docker run -v "path/to/src:/app/src" -v "path/to/socks:/app/socks" -d uwsgi)
	# $ docker wait $ID
	# $ docker logs $ID

	FROM ubuntu:12.04

	# DOCKER-VERSION 0.6.1
	# Borrowed from https://github.com/vvlad/dockerfiles-postgresql-9.3
	#
	# First run:
	# $ docker build -t postgresql -rm=true .
	# $ ID=$(docker run -e "CREATE_DB=foo" -v "path/to/socks:/var/run/postgresql" -d postgresql)
	# $ docker wait $ID
	# $ docker logs $ID

	FROM ubuntu:12.04

	sudo apt-get install --assume-yes python-software-properties
	sudo apt-add-repository ppa:chris-lea/node.js
	sudo apt-get update
	sudo apt-get install --assume-yes nodejs
	sudo apt-get install --assume-yes git

	# Install Graphite
	sudo apt-get install python-dev ruby-dev bundler build-essential libpcre3-dev graphite-carbon graphite-web
	cat >> /tmp/graphite-carbon << EOF
	# Change to true, to enable carbon-cache on boot

	# A sample view from my upcoming meta-framework.
	# You probably won't have things like `request.features` or `api` or `expose_api` etc. Coming soon.

	@expose_api('account.create')
	def account_create(request):
	if request.features.get('invite_required'):
	raise APIControllerError("Method not permitted: %s" % account_create.exposed_name)

	email, password, password_confirm = get_many(request.params, required=['email'], optional=['password', 'password_confirm'])

	#!/bin/bash
	# post-receive hook to push-deploy multiple branches using a git repo.
	#
	# Deploy by pushing $DEPLOY_BRANCH
	# Rollback by force-pushing a new reference to $OVERRIDE_TAG
	#
	# 1. Setup your git repo:
	#
	# git init --bare
	#

	release: bin/release
	web: ...
	worker: ...