Historically, this detection has relied on complex electronic noses (e-noses) comprising numerous sensors ... with the ...

Experts estimate that IoT devices will exceed 40 billion by 2030. An IoT system has four main components: sensors, connectivity, data processing, and user interfaces. Sensors gather data ...

and also pulling data from a BME280 environmental sensor as well as a CCS811 VOC sensor — so it’s keeping fairly busy. As impressive as this build is, we do hate that it had to be built.