https://artosalminen.github.io/tags/esphome/ Recent content in ESPHome on Arto's dev time by-products Hugo -- gohugo.io en Wed, 21 Oct 2026 00:00:00 +0000 https://artosalminen.github.io/posts/how-to-automate-darts-board-lights-with-esp32/ Wed, 21 Oct 2026 00:00:00 +0000 https://artosalminen.github.io/posts/how-to-automate-darts-board-lights-with-esp32/ <p>My dartboard has its own light and a score display, both on Tapo smart plugs. I wanted them to turn on when I start throwing and off when I stop, without touching a switch or a phone. The solution is a vibration sensor on the board, an ESP32 running ESPHome, and two Home Assistant automations.</p> <p>Full source: <a href="https://github.com/artosalminen/esp32-vibration-sensor">github.com/artosalminen/esp32-vibration-sensor</a></p> <h2 id="hardware">Hardware</h2> <ul> <li><a href="https://www.amazon.de/dp/B0DYV1TJQS">diymore ESP32-C3 board with a 0.42&quot; OLED</a>. Native USB-C and a built-in 72x40 SSD1306 display.</li> <li><a href="https://www.amazon.de/dp/B07XJTNRD8">SW-420 vibration sensor module</a>. A spring vibration switch with an LM393 comparator, a sensitivity potentiometer and a digital <code>DO</code> output.</li> <li>Three Dupont jumper wires.</li> <li>A smart power strip for the light and display. I use a <a href="https://www.verkkokauppa.com/fi/product/847273/TP-LINK-Tapo-P300-alyjatkojohto">TP-Link Tapo P300</a>, which has three individually switchable outlets. Through Home Assistant&rsquo;s TP-Link Smart Home integration each outlet shows up in Home Assistant as its own switch, for example <code>switch.office_p300_darts_board_light</code> and <code>switch.office_p300_darts_display</code>, the entities used in the automations below.</li> </ul> <p>Wiring is three wires:</p>