My RX Line Was Stuck High, and TX_EN Was the Fix
DEV Community • 2026-04-26 10:41

My RX Line Was Stuck High, and TX_EN Was the Fix

I was working on CH32V00X integration for tinyboot on my newly fabricated CH32V006 OpenServoCore dev board, thanks to the generous sponsorship from PCBWay. The UART controller of this chip shares the same silicon and thus reuses the same tinyboot HAL driver as the CH32V003. However, the tinyboot CLI couldn't talk to the flashed bootloader via UART at all. This is strange... Same UART silicon, same...

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7m read
Building a Timezone Converter Chrome Extension: Convert Time Case Study
DEV Community • 2026-04-26 10:41

Building a Timezone Converter Chrome Extension: Convert Time Case Study

There are over 400 timezones. I built a Chrome extension that handles all of them on hover. Here's what I learned. Key Metrics Metric Value Installs 267 Timezones Supported 400+ User Action Required 1 hover Time Saved ∞ The Problem I saw many people in reddit forums, constantly tripping over timezone math. Every call, every deadline, every "let's sync at ...

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3m read
DEV Community • 2026-04-26 10:37

“From Narrow AI to Agentic AI: The Shift Highlighted at Google Cloud Next 2026”

This is a submission for the Google Cloud NEXT Writing Challenge We often think AI is already very advanced — but what if we are still just at the beginning? You know, I am a very imaginative person. I am always curious about futuristic scenarios — how AI will evolve, how it will think, and how it might change our lives. Earlier, I believed AI was mostly about tools like ChatGPT and Google Gemi...

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3m read
DEV Community • 2026-04-26 10:36

I built a calculator. Then Google rejected my $25 payment 50 times before I could even create an account to submit and launch it

I'm Rishi. Founder of Origin Empire. I built OriginCalc. Not a basic calculator. A complete toolkit. 5 calculators. 12 converters. 160+ currencies. TTS. Dark mode. History. Notepad. Free. No ads. No data collection. Works offline. After building it, I went to Google Play Console to pay the $25 registration fee and create my developer account. Before even creating my account, I was rejected. ...

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1m read
DEV Community • 2026-04-26 10:32

Stop Wasting Time Setting Up Flutter Projects: How to Solve the "Start from Scratch" Problem

Every mobile app developer knows the pain: you have a brilliant idea for a new app, but before you can write a single line of feature code, you have to spend hours just setting up the project. Configuring folder structures, setting up state management, defining a scalable architecture, configuring custom fonts, themes, and handling routing—starting a Flutter project from scratch is repetitive and...

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1m read
DEV Community • 2026-04-26 10:31

Building a Complete Developer Terminal Setup for Claude Code — Part 2: Custom Statusline

Building a Complete Developer Terminal Setup for Claude Code — Part 2: Custom Statusline By Avinash, GenAI Practice Lead | Part 1 | Part 2 of 6 ⚠️ Note: This setup is macOS-specific. All tools, commands, and configurations in this series are tested on macOS (Apple Silicon). Linux and Windows users will need to adapt certain steps, particularly around afplay, brew, iTerm2, and system f...

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3m read
DevSecOps in Practice: Tools That Actually Catch Vulnerabilities - Part 4 - IaC Scanning with Checkov
DEV Community • 2026-04-26 10:28

DevSecOps in Practice: Tools That Actually Catch Vulnerabilities - Part 4 - IaC Scanning with Checkov

The previous parts covered application security — secrets, code vulnerabilities, and dependency CVEs. This part shifts to the infrastructure side. The Terraform in the repo describes the AWS resources the app would run on. If that infrastructure is misconfigured, it doesn't matter how clean the application code is. IaC scanning catches those misconfigurations before terraform apply ever runs. Cod...

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4m read
DEV Community • 2026-04-26 10:24

NCMEC Mandatory Reporting for Online Platforms: What Developers Need to Know

Every online platform that allows user-generated content faces a legal reality that most engineering teams discover too late: if your users can send each other messages, you may be a mandatory reporter under federal law. 18 U.S.C. § 2258A requires Electronic Service Providers (ESPs) to report apparent child sexual exploitation material (CSEM) to the National Center for Missing & Exploited Chi...

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7m read
DEV Community • 2026-04-26 10:21

Why I Stopped Trying to Count "Exactly Right" and Started Subtracting

I've been working through coding problems that I can understand when reading solutions but struggle to solve on my own. This series is about breaking down the "why does this actually work" part. Not tutorials. Just honest breakdowns of where my thinking got stuck and what finally unstuck it. The problem that broke my brain LeetCode 795: Number of Subarrays with Bounded Maximum. You get...

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5m read
DEV Community • 2026-04-26 10:21

Claude Code doesn't make your product better. It makes it bigger.

Shipping faster has never been easier. Shipping better has never been harder. Claude Code is the most impressive code-generation tool I've ever used. It's also the fastest way to turn a clean codebase into an unmaintainable mess if nobody's paying attention. And right now, not enough people are paying attention. The output is not the outcome Ethan Ding recently published a piece argu...

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3m read
DEV Community • 2026-04-26 10:19

"Run a Fully Local AI With Persistent Memory: LM Studio + Big RAG Guide"

If you've ever wanted a completely private, offline AI assistant that actually remembers what's in your documents — and doesn't forget your conversation the moment you open a new chat — this guide is for you. We're going to: Set up LM Studio running Google's Gemma 4 locally Install the Big RAG plugin to index your documents Modify the plugin source to add genuine persistent memory across sessi...

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7m read
DEV Community • 2026-04-26 10:17

Day 83 of 100 Days Of Code — CRUD Backend + API Routes in Flask

Yesterday, I set up Flask-SQLAlchemy with models, migrations, and database operations. Today I put it all together, building a complete CRUD backend with both HTML views and API routes in the same Flask app. This is where everything from the past few days connects into something that actually works end-to-end. Let's see it in action To understand how the CRUD backend and API works i...

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7m read
OpenClaw - Here's the best setup guide you'll ever need.
DEV Community • 2026-04-26 10:15

OpenClaw - Here's the best setup guide you'll ever need.

This is a submission for the OpenClaw Writing Challenge before you install anything straight in - you need three things ready before you even touch a terminal. AI model API key openclaw works with multiple model providers. you're not locked to one. here's what's available right now: and my pick - anthropic (claude) - the best overall for agents. opus 4.6 is the smartest model available an...

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9m read
DEV Community • 2026-04-26 10:13

Your Guide Into the Development World: A Roadmap for Absolute Beginners

Your Guide Into the Development World: A Roadmap for Absolute Beginners You've decided you want to code. Maybe you saw someone build a cool app, maybe you want a career change, maybe you're just curious. Whatever brought you here — welcome. This guide is written for you. First, Let's Kill a Myth You don't need to be a math genius to become a developer. You don't need a Co...

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6m read
ROAS 100% is not the breakeven point — what most ad reports get wrong
DEV Community • 2026-04-26 10:13

ROAS 100% is not the breakeven point — what most ad reports get wrong

I keep hearing this line in marketing reviews: "Our ad ROAS is 300%, so we're profitable." For a 50% gross margin product, that's true. For a 20% gross margin product, that's a loss. The same line, the same number, opposite conclusions. This isn't an exotic edge case. ROAS alone tells you nothing about whether you're profitable. The math is small but it almost never gets put on the same slide as ...

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5m read
DEV Community • 2026-04-26 10:12

Building a Complete Developer Terminal Setup for Claude Code — Part 1: The Problem

By Avinash, GenAI Practice Lead ⚠️ Note: This setup is macOS-specific. All tools, commands, and configurations in this series are tested on macOS (Apple Silicon). Linux and Windows users will need to adapt certain steps, particularly around afplay, brew, iTerm2, and system font installation. I lead a GenAI practice and manage a broad portfolio of active AI projects. A significant part of my...

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3m read
[Boost]
DEV Community • 2026-04-26 10:10

[Boost]

I Built an Offline AI for Indian Courts — Here's Why (And How) Gangadhar Gangadhar ...

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1m read
How I Passed the AWS Certified AI Practitioner in 2 Weeks Using 100% Free Resources (While Working Full-Time)
DEV Community • 2026-04-26 10:10

How I Passed the AWS Certified AI Practitioner in 2 Weeks Using 100% Free Resources (While Working Full-Time)

Two weeks ago, if someone had asked me about most AWS AI services, I probably would have smiled confidently… and changed the topic. Apart from a basic understanding of AWS and a few familiar services like Amazon S3, AWS IAM, and Amazon Cognito, I was definitely not what you would call an AWS certification machine. In fact, this was my very first AWS certification exam. Fast forward 14 days late...

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4m read
DEV Community • 2026-04-26 10:06

URL Encoding Explained: Why %20 Appears in URLs (and How to Decode It)

You paste a URL into your browser and it looks like this: https://example.com/search?q=hello%20world&filter=price%3E100 What are all those %20 and %3E symbols? Why does a space become %20? And why does > become %3E? This is URL encoding (also called percent-encoding), and understanding it will save you from a category of bugs that trips up developers at every experience level. ...

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3m read
DEV Community • 2026-04-26 10:04

A complete beginner-friendly guide to deploying your Discord bot for free with 24/7 uptime using Kerit Cloud — supports Python, Node.js, and more.

So you just built your first Discord bot. It runs perfectly on your laptop — but the moment you close the lid, it goes offline. Sound familiar? This guide will show you exactly how to get your Discord bot running 24/7 for free, without touching a credit card, using Kerit Cloud — a free and premium cloud hosting platform built specifically for Discord bots, Minecraft servers, and Lavalink nodes. ...

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