[Eli_P]

It's not that easy. Take into consideration spreading of sensors like light/water/gas/sewerage meters, which report measurements to a central SCADA. I touched that around a decade ago, I had to build link with the meters with AT commands through GSM with modbus protocol on top of that.

These days it's a grown-ass market with competition and much more advanced toys involved. You turn on water, they know timings and how much you used. You use more electricity, they call you to suggest a different plan. You used drugs and flushed, they find metabolites in sewerage sensors (I heard that on news, dunno maybe bs).

So I think it's basically about bills; cameras in toilets are different market.