Wemos D1 18650 + MAX6675 Temp. sensor

prusaprinters

<p>I started this project trying to find a better way to measure the temperature of my Pizza oven than constantly having to open the front hatch and pointing an infrared laser at the stone.</p><p>The following parts are used:</p><ul><li>Wemos D1 / ESP8266 / WROOM-02 / 18650 board (similar to <a href="https://www.ebay.com/itm/384750286779">https://www.ebay.com/itm/384750286779</a> , you will find many variants of this board)</li><li>MAX6675 SPI Temperature sensor board + k-type thermocouple (<a href="https://www.ebay.com/itm/153786185405">https://www.ebay.com/itm/153786185405</a> - again a whole lot of similar options)</li><li>an 18650 cell from an old laptop battery</li><li>3x M2 threaded inserts + some random screws I had laying around for mounting the Wemos Board. Notice that one of the corners doesn't have a screw hole, since the SMD components on the underside of my specific board would be too close and therefore I used that little, printed peg instead.</li><li>1x M3 threaded insert + another random screw for mounting the MAX6675 board</li><li>female-to-female jumper cables that came with the MAX6675 board for connecting it to the D1</li></ul><p>I flashed ESPhome to the board and report the temperature back to HomeAssistant for now. You can find the esphome-config on my GitHub page if you're interested: <a href="https://github.com/grubFX/esphome-configs/blob/master/src/wemos18650-max6675.yml">https://github.com/grubFX/esphome-configs/blob/master/src/wemos18650-max6675.yml</a>&nbsp;</p>