AirCO2ntrol Mini backplate with Wemos D1 Mini

prusaprinters

<p>This is a replacement backplate for a TFA Dostmann “AirCO2ntrol Mini” CO2 sensor that includes a separate compartment to hold a Wemos D1 Mini connected to the sensor's debug port through a passthrough slot. The ESP allows you to put the sensor on your network and pipe the sensor data into your existing home automation setup.&nbsp;</p><p>This backplate design will probably also fit other incarnations of the same sensor housing. It was inspired by <a href="https://www.thingiverse.com/thing:4225732">this thing</a> by Stefan Kern, and created as in that design the heat of the ESP was negatively influencing the sensor's readings. The separate compartment seems to have solved this for me.</p><p>While it isn't the focus of this entry, in case you are wondering how to use a Wemos D1 Mini with the sensor, how to wire things together and what to flash, you can read more about this <a href="https://foosel.net/blog/2022-01-03-tfa-dostmann-meets-esphome">on my blog</a>.</p><h3>Part list</h3><ul><li>1 x Backplate</li><li>1 x Backplate Lid</li><li>2 x M3x14mm bolts</li><li>2 x M3 nut</li></ul><p>Use the bolts and nuts to screw the lid to the backplate after inserting the ESP.</p><h3>How this was designed</h3><p>This thing was designed in <a href="https://github.com/realthunder/FreeCAD_assembly3/releases">FreeCAD Linkstage</a>, version 2022.01.11, and the design process was streamed live on <a href="https://twitch.tv/thefoosel">Twitch</a>. Recordings of the streams are available on YouTube:&nbsp;</p><figure class="media"><oembed url="https://www.youtube.com/watch?v=eM3hdqmqNtc&amp;t=4129s"></oembed></figure><figure class="media"><oembed url="https://www.youtube.com/watch?v=HbruCMSPYS4&amp;t=2621s"></oembed></figure>