Every AWS application eventually needs to persist files: user uploads, generated reports, Lambda artifacts, data exports. S3 is the default answer, and boto3 makes reading and writing to it straightforward from Python. TL;DR: Read and write files to AWS S3 using Python and boto3, including upload, download, and bulk file listing.Stack: Python, boto3, AWS S3Level: … Read more
Application Load Balancers work well for HTTP/HTTPS traffic, but when you need to handle raw TCP/UDP at high throughput with minimal latency, a Network Load Balancer is the right choice. It operates at Layer 4 and routes connections directly to target IPs without inspecting HTTP headers. TL;DR: Set up an AWS Network Load Balancer (NLB) … Read more
The Arduino Ethernet Shield turns your microcontroller into a network device. With it you can make HTTP requests, serve small web pages, or integrate Arduino sensor data into a larger system over the LAN. TL;DR: Connect an Arduino Ethernet Shield to a network and make HTTP requests or serve data from a microcontroller.Stack: Arduino, Ethernet … Read more
The DHT11 is a basic temperature and humidity sensor that outputs digital readings. It costs almost nothing and works out of the box with Arduino, but the library setup needs to be done correctly or you get garbage data. TL;DR: Connect a DHT11 sensor to an Arduino and read temperature and humidity using the DHT … Read more
Arduino is a microcontroller platform that bridges software and hardware. If you have never done embedded development, it is the fastest entry point: cheap boards, a simple IDE, and a massive library ecosystem. TL;DR: An overview of the Arduino platform: the board, the IDE, the basic program structure, and the essential concepts for getting started … Read more
Your Lambda function is slow and you have no idea which part is causing it. X-Ray traces each invocation, shows you service map connections, and breaks down where time is being spent. It is the difference between guessing and knowing. TL;DR: Add AWS X-Ray tracing to a Python Lambda function to get distributed traces and … Read more
SNOMED CT provides a structured vocabulary of millions of clinical concepts. FHIR provides the exchange format for healthcare data. Combining them via the Snowstorm server gives you a standards-compliant terminology service that healthcare systems can query. TL;DR: Query the Snowstorm SNOMED CT terminology server via its FHIR-compatible API to look up clinical concepts and code … Read more
.NET Core is Microsoft’s cross-platform, open-source runtime for building web APIs, background services, and console apps. This reference covers the patterns that come up in real production applications. TL;DR: A .NET Core reference covering web APIs, dependency injection, Entity Framework Core, authentication with JWT, and Azure deployment.Stack: .NET Core, C#, ASP.NET Core, Entity Framework CoreLevel: … Read more
React component state works fine until multiple components need the same data and prop drilling becomes unmanageable. Redux provides a single, predictable state container that any component can read from and dispatch actions to. TL;DR: A React + Redux reference: store setup, actions, reducers, selectors, and Thunk middleware for async operations.Stack: React, Redux, Redux Toolkit, … Read more
A Django API serving real-time features needs more than the ORM. Redis handles caching and session storage, Django REST Framework structures the API layer, and Firebase provides real-time push to connected clients. TL;DR: Build a full Django backend combining DRF for REST APIs, Redis for caching, and Firebase for real-time push notifications.Stack: Python, Django, Django … Read more