Author: Sankar Cheppali

In the past, setting up raspberry pi would require a keyboard and monitor. There were ways to do it without keyboard in the past also, but it was

MQTT is a popular pub/sub protocol in IoT space. Its lightweight and has client libraries for several IoT platforms. We have already seen how to use MQTT on

When a colleague or a friend comes to you with a problem, most of the time it’s because they are so deep in the rabbit hole, they last

Digital clocks are affordable and ubiquitous. In this post, we will build a digital clock using ESP32 and TM1637 on Arduino platform. There are several TM1637 based 4

Networked digital devices can get time by sending a NTP request to any one of the NTP servers available on the internet. This is very use full service

All digital clocks experience clock drift. They need to periodically synchronisation with reference clocks. Networked devices such as PCs and smartphones use Network Time Protocol (NTP) for clock

Java record class is the new language construct introduced into java language to provide succinct way to create types that carry immutable data. record classes are a special

TM1637 is versatile LED driver and keypad scanner chip. There are many 4 digit 7 segment display boards readily available in the market. In this post we will

ESP32 is an inexpensive IoT chip. ESP32 makes it easy to add internet capability to embedded systems. We have seen how to develop a token display using Arduino

Data centers and racks full of servers with multi-core processors comes to mind when we think of web servers. For small webpages, we don’t need all these big