Michał Zalewski mizalewski

Z-Stick Serial API

The Z-Stick does bi-directional communication over a UART. The connection speed is 115200, '8N1'. There are "requests" and "responses". The client software can make requests to the Z-Stick, and it will send responses. But it seems the Z-Stick can make requests of the client software too. I have yet to figure out the requests the Z-Stick sends to the client software.

Packets

Frontend Development

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	After automatically updating Postgres to 10.0 via Homebrew, the pg_ctl start command didn't work.
	The error was "The data directory was initialized by PostgreSQL version 9.6, which is not compatible with this version 10.0."

	Database files have to be updated before starting the server, here are the steps that had to be followed:

	# need to have both 9.6.x and latest 10.0 installed, and keep 10.0 as default
	brew unlink postgresql
	brew install [email protected]
	brew unlink [email protected]
	brew link postgresql

	require 'cgi'
	require 'active_support'

	def verify_and_decrypt_session_cookie(cookie, secret_key_base = Rails.application.secret_key_base)
	cookie = CGI::unescape(cookie)
	salt = 'authenticated encrypted cookie'
	encrypted_cookie_cipher = 'aes-256-gcm'
	serializer = ActiveSupport::MessageEncryptor::NullSerializer

	key_generator = ActiveSupport::KeyGenerator.new(secret_key_base, iterations: 1000)

	# This enables a publicly available server to forward connections to your computer behind a NAT.
	# So if you access http://xx.xx.xx.xx:8080/ on your browser, traffic is redirected to your machine behind a NAT.

	# on your local host, type:
	ssh -R xx.xx.xx.xx:8888:localhost:80 [email protected]

	# now wait for your shell, and type:
	socat TCP-LISTEN:8080,FORK TCP:127.0.0.1:8888

	# This command outputs nothing, just keep it running. While you don't ^C, your tunnel is up and running!

	public class AccountAuthenticator extends AbstractAccountAuthenticator {

	private final Context context;
	@Inject @ClientId String clientId;
	@Inject @ClientSecret String clientSecret;
	@Inject ApiService apiService;

	public AccountAuthenticator(Context context) {
	super(context);

	app.directive('ngFocus', ['$parse', function($parse) {
	return function(scope, element, attr) {
	var fn = $parse(attr['ngFocus']);
	element.bind('focus', function(event) {
	scope.$apply(function() {
	fn(scope, {$event:event});
	});
	});
	}
	}]);

	// Make our app module, its easier to do this in raw javascript
	// and then put the rest of our app content (controllers etc)
	// in their own coffeescript files.
	//
	// Your ng-app should include this module name, eg: <html ng-app="TodoApp">
	angular.module('TodoApp', []);

	app.filter('bytes', function() {
	return function(bytes, precision) {
	if (isNaN(parseFloat(bytes)) \|\| !isFinite(bytes)) return '-';
	if (typeof precision === 'undefined') precision = 1;
	var units = ['bytes', 'kB', 'MB', 'GB', 'TB', 'PB'],
	number = Math.floor(Math.log(bytes) / Math.log(1024));
	return (bytes / Math.pow(1024, Math.floor(number))).toFixed(precision) + ' ' + units[number];
	}
	});

	#!/usr/bin/env ruby
	require 'spreadsheet'

	# Begin Test
	print "Spreadsheet Test\n"

	# Create the rows to be inserted
	row_1 = ['A1', 'B1']
	row_2 = ['A2', 'B2']