I build a fully automated ‘hand sanitizer factory’ back in the summer of 2020 out of boredom and a feeling that it could actually be useful at some point. It d

I build a fully automated ‘hand sanitizer factory’ back in the summer of 2020 out of boredom and a feeling that it could actually be useful at some point. It doesn’t exactly rot but some of the challenges are similar. I found a really nice modular architecture in esp32 flashed with tasmota for all of the sensors and switching, they would talk via MQTT over Wi-Fi to a raspberry pi running node-red. It was responsible for all of the data integration, flows, process automation and dashboards. Just made it super easy to add/remove features without rewiring things and allowed me to replace the esp32’s very easily.