10 days back, IBM had Developers Day in India. What Happened on IBM Developer Day 14th March 2019? What gain your new company will get by attending such event? In very short without making the description of the event detailed (and disgusting), we must point it that it was more than a trade fair than just series of lectures. There was lot of things to play hands-on. IBM has uploaded some of the … [Read more...]
Archives for March 2019
Contact Bounce of Pushbuttons and Arduino ESP32 Debounce
No surface is perfectly smooth and inelastic. When two surfaces of pushbutton comes together with any force, there is kinetic energy that makes ringing. In one older article we talked about different types of switches. That basic idea and terminogies required to be known for this article on the phenomenon contact bounce of pushbuttons and counteracting with software library. Contact bounce is a … [Read more...]
Writing to CouchDB/Cloudant From ESP32 Arduino
You'll not get full working code in this guide but get full hints of code, resources. This guide will help to learn our regular readers in opposite direction of learning. Methodology is exactly like we did with Watson IoT platform (our GitHub repo has four sample codes). Here Are Some Tips, Resources For Writing to CouchDB/Cloudant From ESP32 Arduino. Our regular readers can recall about HTTP Post … [Read more...]
What Are the Use Cases for CouchDB
What Are the Use Cases for CouchDB? CouchDB is suitable for applications with accumulating, occasionally changing data with pre-defined queries. NoSQL is bad to anyone starting. But SQL not required for certain applications, such as writing log files. MySQL of course powerful but the features and power not exactly suitable with the need of mobile aplications, data analytics, some web applications. … [Read more...]
How to Install CouchDB on Ubuntu Cloud Server
Here Are the Steps to How to Install CouchDB on Ubuntu Cloud Server With root Access as Single Node. Data can be ported from Cloudant to CouchDB. There is CouchDB, CouchIO, CouchOne, Couchbase, Couchbase Server, Couchbase Mobile, Couchbase Lite, CouchApps, BigCouch, Touchbase, Membase, Memcached, MemcacheDB. All are different but are related in a way not obvious from the names alone. First, there … [Read more...]
Cloud Software vs On Premise Software : Users are Less Satisfied
Not only the general customers, the corporate customers in some segment not happy with cloud software. Several surveys revealing that the price policy and the license models are in the criticism. More and more are thinking about switching their software suppliers. Most of the studies on average, the surveyed companies are used wit both the license agreements with on-premise service providers and … [Read more...]
Hirose U.FL Connector and Antenna for Wi-Fi (Pi Zero, ESP32)
Hirose U.FL connector and antenna required for Wi-Fi in some models of Pi Zero, ESP32. U.FL/IPX connector commonly used on PCB of everyday electronics. U.FL/IPX to SMA adapters sold in the market. Often, the name of the unit not known to many of the makers. Hirose Electric Company Limited is a Japanese electronics company specializing in the manufacturing of electric connectors, flexible … [Read more...]
What is Mobile Cloud Storage?
The cloud storage has the advantage of pay for use and also it offers elastic scalability. There are challenges of mobile devices like limited bandwidth, limited computing power, and also limited storage (for backup) which has led the manufacturers and service providers to develop some value-added mobile cloud storage services. Mobile cloud storage is a storage service which is accessible … [Read more...]
Apache Projects for Big Data Analysis in IoT
Big data analytics is emerging as a key IoT initiative. One of the most important features of IoT is its analysis of information about connected things. Big data analytics in IoT demands to process a huge amount of data and store the data in the storage. Sensors send gigabytes of data in an hour. The real challenge is to store, manage and derive value from these sensors data. Big data technologies … [Read more...]
ESP32 Arduino Built-in Hall Sensor Code & Theory
ESP32 has a Hall Effect Sensor near pin 22, just below and middle of the inscription "ESP32-WROOM-32", inside the metal cover. Hall effect sensors measure the magnitude of a magnetic field as output voltage. Hall effect sensors are used for proximity sensing, positioning, speed detection, and current sensing applications. Hall sensor when combined with threshold detectors act as a switch. That is … [Read more...]
Visual Paradigm : A Tool to Create Illustration of Different Things
Visual Paradigm is a Nice Tool to Create Illustration of Different Things With Free Tier of Usage. You can create infographics, circuit diagram, flow charts, data visualization. Officially, it is an UML (Unified Modeling Language) CASE (Computer-aided software engineering) tool supporting UML 2, SysML and Business Process Modeling Notation (BPMN). There are several other such software, some of … [Read more...]
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