Tagged: Hardware

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Getting Started with Zeroplus LAP Educator 8 Ch Logic Analyzer

Table of Contents1 Model- Zeroplus LAP Educator2 Software2.1 No Linux support yet3 Standard4 Protocol Analyzer Logic Analyzer is a good tool to have on your work bench. You read about my experiments with cheap knockoff last time. Now I have a Zeroplus LAP Educator1. It’s a 8 channel Logic Analyzer targeted at DIY...

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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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...

Lepidopte Web UI. 0

Detecting Web Censorship by Running OONI on Pi Zero

In 2015 I had put together a simple script to check the status of various websites that were blocked (Censored) by ISPs (Internet Service Providers) in India for various reasons. It was a very simple script based on simple rules. Idea was to get a sense of censorship in India. After a while...