A container for all my views with excerpts from technology, travel, films, books, kannada, friends and other interests. I am Thejesh GN, friends call me Thej.
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...
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...
Last year when I was designing the BLE App, one of the hurdle we faced was the packet size. I couldn’t send more than 20 bytes of data at once. So I had to created packets of 20 bytes and send them one by one, with some headers for packet information. On the...
As you know I have been experimenting around Bluetooth. Until now it’s mostly on Bluetooth Low Energy (BLE) which I think is much easier to understand and implement[1 At the application level]. Last few weeks I have been exploring the Classic Bluetooth, specially Serial Port Profile (SPP). This is when I found out...
As you would know I use ESP8266 in every possible way. It’s probably the cheapest board with Wifi chip built-in. When I heard about ESP32, it was a dream come true. ESP32 packs both Wifi and BLE in one single module for less than $10. Given the size of developer fan following 8266...
Let’s say I have a Bluetooth Low Energy device which is a GATT server and is not connected to internet. I have a phone which can connect to this BLE device, authenticate itself and do some data exchange. The problem I am trying to solve authentication. The condition is both BLE device and...
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Thejesh GN (ತೇಜೇಶ್ ಜಿ.ಎನ್) "Thej" is an Independent Technologist, Hacker, Maker, Traveler, Blogger, InfoActivist, Open data and Open internet enthusiast from Bangalore, India. He loves experimenting with all things life and hence some times he is called hacker and other times duct tape. You can read more about him here. Email [ i @ thejeshgn dot com]. PGP/GPG Keys are here.
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