I was tired of my oil running out during the winter months, so I asked Will if he’d help me create a way for my oil tank to alert me when the oil level is low. That way I don’t run out of heat and everyone stays warm and happy all winter long. Will used the Arduino ESP8266 with a NodeMCU breakout for 5v power supply. The prototype uses a clothes pin so we could adjust the fulcrum point easily. So far so good. It even emails me a meme of Wiggly Loaf to alert me when oil is low. So amused.