Category: Technology

NodeMCU responding back to commands sent over bluetooth SPI 0

Configuring HC-05 using NodeMCU and Performing Transparent Serial Communication

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...

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Using Cheap Logic Analyzer with PulseView

In my fourth semester of engineering I built a logic analyser mostly using analog components and parallel port. After that I had not thought about one. But for last few weeks I have been dabbling with reverse engineering some signals. A logic analyser comes in handy for that. I really wanted to buy...

Image Credit: Espressif Systems. ESP32 is created and developed by Espressif Systems. 1

ESP32 – BLE : Building an Echo Service GATT Server

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...

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Reading books on a phone – How I make the most of it

I have a kindle with keyboard. I love the hardware. Its easy on eyes, easy to carry and stays “on” forever. That said I have stopped reading on my kindle. I mostly read on my mobile. There are a couple of reasons. I always have my mobile. I can read a chapter when...

Computer History Museum Tickets with Punched cards 0

Computer History Museum

I was in Mountain View for Google I/O. I used this opportunity to visit Computer History Museum. I must say it’s one of the best museums that I have been to. It’s a must. If you ever go to Mountain View, please visit. I spent almost a day, even that was not enough....

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Subscribing to A list of feeds using Feedbase.io and Liferea

The biggest pain point of RSS feed reading is subscription management. I use different feed readers at different places. On a computer on which I can’t install a program I use browser addons. On my personal computer I use Liferea. On phones1 I use AntennaPod though which I subscribe and listen podcasts. All...