Another thing that surprised me was that this afternoon the #BME680’s CO2 equivalent readings reached way over 1000ppm, peaking at about 1800ppm and staying above 1500ppm for several hours. 1000ppm CO2 indoors is the threshold most sensor appliances use to notify the user that they should open a window to decrease the concentration. Well, bad luck in the winter, in the city 🎶 (I’m sorry, Joe Cocker). #EnvironmentalSensors #CO2 #BadPopculturalReferences