When you are dealing with microcontrollers, you often come across with the use-case of updating device software (aka firmware). I was working on a project using XIAO BLE Sense and I needed to distribute the firmware. My target users were not technical and were not familiar with Arduino IDE to…

What is QLDB? Let me steal the definition from Amazon website as that’s the best definition I found — “Amazon QLDB is a fully managed ledger database that provides a transparent, immutable, and cryptographically verifiable transaction log ‎owned by a central trusted authority”. This means QLDB is centralized ledger database where data is…

“Everything fails all the time” — Werner Vogels This is sad but true, everything fails specially in Microservice architecture with many external dependencies. Modern applications have tens of microservices which communicate with each other over REST. Anytime any microservice may go down causing entire operation to fail. At a broad…

I got very excited when I first saw Microsoft Bot Framework (https://dev.botframework.com). Microsoft has done a great job! You can deploy same bot to multiple channels such as MS Team, Slack, Facebook. But all the documents/tutorial I read recommend to deploy bot backend code to Azure. I have been working…

During Christmas break I was planning to implement a smart door bell. A Raspberry Pi in the porch with a camera attached to it. Pi will capture the image of the person, recognize the face and if face matches, it will signal another Pi inside the house which will unlock…

The Cloud Computing World is moving to Serverless architecture for obvious reasons. There is no need to keep your servers running and paying for 24X7 where you application may be serving your customers 50% of a day. …