https://dinhnn.com/tags/esp32/ Recent content in Esp32 on Định Nguyễn Hugo en-us Tue, 14 Apr 2026 14:00:00 +0700 https://dinhnn.com/posts/claublink-led-indicator/ Tue, 14 Apr 2026 14:00:00 +0700 https://dinhnn.com/posts/claublink-led-indicator/ <h2 id="tldr" class="anchor-link"><a href="#tldr">TL;DR</a></h2> <p>I built a physical LED indicator that shows what Claude Code is doing in real-time. Fast blink means it&rsquo;s streaming a response. Slow blink means it&rsquo;s thinking. Solid green means it&rsquo;s done. Works over USB serial and WiFi, supports two boards (ESP32-C3 and RP2040), and hooks into Claude Code&rsquo;s event system with a 56-line shell script.</p> <p><strong>GitHub:</strong> <a href="https://github.com/dinhnguyen/ClauBlink">github.com/dinhnguyen/ClauBlink</a></p> <hr> <h2 id="why" class="anchor-link"><a href="#why">Why</a></h2> <p>I run Claude Code sessions that sometimes take a while. At home, I don&rsquo;t want to sit there watching the terminal. I want to step away, play with my kid, do something else. But checking my phone for notifications isn&rsquo;t great either, because if I&rsquo;m playing with my son, I&rsquo;m playing with my son, not staring at a screen.</p>