Tagged: Code

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...

HOPCOMS API 4

Building HOPCOMS Fruit/Veg Rate API using CouchDB

I love HOPCOMS stores. There are quite a few stores across Bangalore. They are popular for fresh vegetables and fruits. The Horticultural Producers’ Co-operative Marketing and Processing Society Ltd. or HOPCOMS was established with the principal objective of establishing a proper system for the marketing of fruits and vegetables; one that benefits both...

IBM Code Day 0

Notes from IBM Code Day – Bangalore – 2018

This was my first IBM Code Day. I had never been to one and the idea of meeting other IBM Champions excited me. Just wanted to know who they were and what they were up to. Code Day also promised some demos and talks that were interesting. I am going to talk about...

Part of #SpeakForMe dashboard showing emails sent to MPs on a PC map. 0

How I built A Quick Dashboard for #SpeakForMe Campaign

#SpeakForMe is a campaign to petition Indian MPs, Banks, Mobile operators and other service providers to speak for you against the Aadhaar linking coercion. You can go to #SpeakForMe to send your petition. As part of campaign I built a quick and dirty dashboard for the emails sent. This is a quick note...

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Introduction to Querying JSON using JSONata

Table of Contents1 Getting Started1.1 Using JSconsole1.2 Into an HTML Page1.3 Using Try JSONata2 Let’s begin with some data3 Let’s write some more queries JSON is the defacto data format for web APIs. Usually getting the data you want out JSON means iterating through the arrays, find if the key exists and then...

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Going Serverless with OpenWhisk

I have been using Webhooks for a long time now. Webhooks are HTTP callbacks. They usually get called with HTTP Post request on an event. For example system one does a POST request on system two when something changes on system one. These are typically used by heterogeneous systems for plumbing. In my...