Blog

Z-Wave vs Zigbee

Home automation is quite popular now in most household and it is common to see retailers dedicate quite a lot of display space to them.  I was in a local Best Buy store recently, and was delighted to find a few aisles of home automation products on display and...

Secure Remote Admin Access with Duck DNS

Now that you have Hass.io running happily on your Raspberry Pi, the next thing in your mind is probably how to access the admin console remotely from the internet, so that you can control your smart home even when you are away from home. One elegant and free solution...

Access Configuration Files with Samba

Hass.io is the latest all-in-one installation for Home Assistant.  It is the simplest way to set up Home Assistant on a Raspberry Pi.  You can now manage your Hass.io with a web console. Once you have Hass.io setup and running on the Pi, you will find that one of...

To Cloud or Not to Cloud?

It is a cloudy morning today, but we are not talking about the weather.  Cloud services are quite popular now and are available quite abundantly and down-to-earth.  There are many discussion in the corporate world regarding availability, reliability, and security for enterprise level type of cloud services.  But how...

Rectangles – Intersection Study

Have you ever walk into a job interview, and were asked to design a program to find if 2 rectangles intersect with each other or not? This apparently is a common “technical” question in a job interview. I do agree that it is an interesting question to evaluate your...

Have an Old IP Camera?

Do you have an old IP camera that you are still using at home? I have 2 of them. This is a Foscam FI8910W camera.  It had its glorious days many years ago, and it is still working like a charm, as older hardware are built to last much...

Math puzzle 2 – answer

Ok, let’s do some analysis and deduction here. Let’s look at the facts provide to us. Fact #1: with the coins, the cashier can not provide change in coins, a dollar, half dollar, quarter, dime, or nickel. Let’s simplify the situation by figure out what’s NOT possible. She can...

Push Notification with Pushbullet

When there is a problem, there is a solution. What is the problem? We’ve been experiencing intermittent slow down which download speed just goes up and down unexpectedly.  I already have internet speed test scheduled on my Home Assistant (HA) every 15 minutes, but what I would really like...

Math Puzzle 2 – Change for a Dollar?

It is a lazy and hot Saturday morning in the summer, in case if you need something to exercise your brain without any sweat, here is an interesting problem to solve. A customer walked into a small local store, customer asked: “Good morning.  Can you please give me change...