Category: Technology

3

JSONFeed River with CouchDB as Backend

I use Pushover to get custom notifications on my phone. I do get all kinds of notifications. I get notifications from my server about their status, Notifications from scrapers like the state of HOPCOMS scraping, Notifications from my weather sensor and AQI etc. Well some of them could have been emails or dashboard1...

4

Testing Async systems with Karate Testing Framework

I have love and hate relationship with asynchronous systems. I love them because the flow is natural and doesn’t waste time and resources. I hate them because it’s difficult to test and debug. The most common asynchronous system that you would have used is Webhook type. Where you get a callback from an...

2

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...

Bluetooth Oximeter 0

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...

Nitrogen dioxide concentrations over India 0

Climate Change and Coders

I was checking the air quality reports of Bangalore for the period of 3 months when we were under strict lock-downs due to COVID-19. Bengaluru’s air has been doing much better under the lock-down. I am sure this is not a unique case. According to the analysis by CREA, for the Health and...

Zim Wiiki screenshot in my outliner mode 0

Outlining Your Notes with Zim Wiki

I have been using Zim Wiki for a long time now. Its my knowledge base. Very frequently I also use it as an outliner to take notes. This is an outline about that; written in Zim Wiki and exported as HTML. I have also attached a screenshot below. Outline is hierarchical text. Its...