How to Read Pins on 8x8 Dot Matrix LED

At the recent robot show at Seattle Center, the one thing that was so attractive to me was…

Day 6: Johnny-Five, NodeMCU

Today was the first day of my hands-on experience for these modules, chips and wirings. It was an exciting day!

Johnny Five

I love love love JavaScript. This love started from front end development. When NodeJS came out…

Flash NodeMCU dev board with Arduino Sketch

1. Download official Arduino IDE 1.6.5, and install it on your laptop.
2. Open Arduino IDE, choose File->Preference->Additional Boards Manager URLs. Then add the url…

Day 7: Monitoring Home Temperature on the Internet

This is my first ever DIY project — detecting the indoor temperature of my house, and send the periodic recordings to ThingSpeak via WiFi.

Building a kid’s sleep training clock using NodeMCU and Parse (Prototype)

When we had corporate jobs, we would hit “Buy Now” button so easily on Amazon for things. Now we are building our own startup, frugality has become a thing, an important thing in our life. My two kids…

Day 3: A “Girly”Arduino — LilyPad

Today, I finished all the lessons for Fritzing Youtube series. Those episodes are not long. If you want to learn in details, you will have to dig into the circuit basics to design your own systems. In the last episode it mentions LilyPad Arduino.

Day 5: ThingSpeak

Today, the founder of eMobileCare, Khalid, was very gracious to spare some time to have a coffee chat with us to talk about Internet of Things. We got to know him from Seattle Startup Hall and a talk he gave recently about IoT and eMobileCare at a meet-up event. It is a wonderful thing to know…

Day 1: Buying IoT Starter Kit

I have done web development during my entire career for many many years, but people hardly know, I studied Automation (a subdomain of Electrical Engineering) in college. Back then, I was fascinated by single chip systems. I still clearly remember how I enjoyed every moment…

What I learned about hardware

I started this publication “Grace Learns IoT” about 1 year and half ago. Back then, I was fasinated by a single microchip getting on the internet. It was a hobby out of curiosity. Fast forward to now, it has become my career!

Day 2: Learn Fritzing

I just got a confirmation saying my chips and starter kit were shipped. YAY! Excited! Meanwhile, I wanted to pick up the basics before I move on to the hands-on experience.