Sean Albito salbito

CircuitPython support for WiFi and Bluetooth LE on Seeed WIO Terminal

I won't be updating this gist any longer. Updated versions of these notes can be found here.

Context

The Seeed WIO Terminal is generally supported by CircuitPython, but there is no implementation for access to the WiFi or Bluetooth LE networking functions on the board. After taking a look at the Arduino support for these features, I can see that the RealTek RTL8720D is set up to be driven by a UART connection from the SAMD51 that acts as the main controller for the WIO Terminal. In other words, the RTL8720D is set up as a co-processor, similar to the ESP32 in Adafruit's Airlift modules.

The UART driver is based on an [embedded remote procedure call (eRPC) libr

Installing ROS Kinetic on Mac OS X - El Capitan and macOS Sierra

Having rather painlessly installed ROS Indigo on El Capitan using Mike Purvis's script, I attempted to upgrade to ROS Kinetic. This gist outlines the problems I encoutered and how I solved them. Hopefully this guide will help others attempting to install ROS Kinetic / Gazebo 7 on El Capitan.

ROS Install OSX

Start with Mike Purvis's script, which currently is setup to install ROS Indigo. In order to install Kinetic instead of Indigo, make sure to set the ROS_DISTRO environment variable: export ROS_DISTRO=kinetic.

After you get through rosdep errors, it's quickest to just work with the catkin config ... and catkin build ... commands directly. In fact, I found it most helpful to leave my catkin workspace terminal open at ros-install-osx/kinetic_desktop_full_ws and t

Credits

All credit to @sahrens for sharing fb's internal implementation.

Setup

clone rocksdb from https://github.com/facebook/rocksdb.
edit MakeFile inside rocksdb. Search for Platform-specific compilation around line 1122. Make th next few lines to look like this:

ifeq ($(PLATFORM), IOS)
# For iOS, create universal object files to be used on both the simulator and

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.

	#!/bin/sh

	sudo newfs_msdos -v EFI -F 32 /dev/rdisk0s1
	sudo mkdir /Volumes/EFI
	sudo mount -t msdos /dev/disk0s1 /Volumes/EFI
	sudo rm -rf /Volumes/EFI/EFI
	sudo cp -R /EFI /Volumes/EFI
	sudo diskutil unmount /Volumes/EFI

	fastlane_version "1.33.0"
	default_platform :ios

	platform :ios do

	before_all do
	cocoapods
	ENV['KEYCHAIN_NAME'] = "TempKeychain.keychain"
	end

	//Customise Backbone.sync to work with Titanium rather than jQuery
	Backbone.sync = (function() {
	var methodMap = {
	'create': 'POST',
	'read' : 'GET',
	'update': 'PUT',
	'delete': 'DELETE'
	};

	var xhr = Ti.Network.createHTTPClient({ timeout: 5000 });

	SIGN UP
	curl -H "Content-Type:application/json" -H "Accept:application/json" \
	-d "{\"user\":{\"password_confirmation\":\"12345678\", \"password\":\"12345678\", \"email\":\"[email protected]\"}}" \
	http://your_server.com/users

	SIGN IN
	curl -H "Content-Type:application/json" -H "Accept:application/json" \
	-d "{\"user\":{\"remember_me\":\"0\", \"password\":\"12345678\", \"email\":\"[email protected]\"}}" \
	http://your_server.com/users/sign_in