Axel ⌨🐧🐪🚴😷 | R.I.P Natenom<p>I wasn't satisfied with <a href="https://chaos.social/tags/Sensirion" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Sensirion</span></a>'s <a href="https://chaos.social/tags/USB" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>USB</span></a> powered <a href="https://chaos.social/tags/CO2" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CO2</span></a> traffic light due to its hardcoded thresholds, so I built my own using a <a href="https://chaos.social/tags/RaspberryPiZero" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>RaspberryPiZero</span></a> with solderless <a href="https://chaos.social/tags/ZeroDongle" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ZeroDongle</span></a>, <a href="https://chaos.social/tags/I2C" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>I2C</span></a> <a href="https://chaos.social/tags/BreakoutGarden" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>BreakoutGarden</span></a> Mini <a href="https://chaos.social/tags/pHAT" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>pHAT</span></a>, Sensirion <a href="https://chaos.social/tags/SCD41" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SCD41</span></a> CO₂ sensor breakout and the <a href="https://chaos.social/tags/Pimoroni" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Pimoroni</span></a> <a href="https://chaos.social/tags/LEDShim" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>LEDShim</span></a>. All parts available at <a href="https://shop.pimoroni.com" rel="nofollow noopener" target="_blank"><span class="invisible">https://</span><span class="">shop.pimoroni.com</span><span class="invisible"></span></a> except for the Pi which is sold out.</p><p>The code behind it is based on two library examples by <span class="h-card"><a href="https://fosstodon.org/@gadgetoid" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>gadgetoid</span></a></span> and available at <a href="https://github.com/xtaran/co2-led-meter" rel="nofollow noopener" target="_blank"><span class="invisible">https://</span><span class="ellipsis">github.com/xtaran/co2-led-mete</span><span class="invisible">r</span></a> under the <a href="https://chaos.social/tags/MITLicense" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>MITLicense</span></a>.</p>