Moving away from Feedburner
There was a small but dedicated set of users subscribed to this blog using FeedBurner feed. FeedBurner was working, but it’s virtually dead. So this week, I decided to move my feeds away from FeedBurner.
Tagged: Hack
Simple BLE Oximeter App using PHONK
In the past I would have used MIT AppInventor or Expo.io. Both have amazing ecosystems. It’s easy to build apps using them. But this time I wanted to use PHONK. I had used Protocoder before and had liked it. Also I have this idea of building small utility apps called applets (yes!), that...
Reverse Engineering A Bluetooth Low Energy Oximeter
Just as COVID-19 is spreading in Bangalore. I got an Oximeter which can measure SpO2. SpO2 is also called as oxygen saturation, According to Wikipedia Oxygen saturation is the fraction of oxygen-saturated hemoglobin relative to total hemoglobin (unsaturated + saturated) in the blood. The human body requires and regulates a very precise and...
How to create Sparklines in LibreOffice Calc
I love using sparklines. I use them everywhere from Google Sheets to web pages. Popularized by Edward Tufte. It’s usually a small line chart without axes or coordinates. Like this . I like them because they go very well with text, without disturbing the flow but significantly adding to the information display. Sparklines...
Reverse Engineering iTag – A Bluetooth Low Energy Button
Couple of weeks back I bought a few iTags. These are simple BLE buttons. They have a small led, a button and a buzzer. CR2032 – a 3v coin cell battery powers it. Since they are Bluetooth Low Energy devices, a single cell can power them for years. It’s easy to change batteries...
Logging code commits with Nomie
I use Nomie to track almost all things in my life. For a long time I wanted to log my commits so I can do some analysis like “where do I code the most?” etc. So as soon as I got the Nomie API key, I created post-commit hooks to track code commits....
