This involves monitoring which room a person is in, which appliances have been used, room temperature and if cupboards, fridges, blinds, have been left open.
Mae hyn yn cynnwys monitro pa ystafell y mae'r person ynddi, pa gyfarpar sydd wedi'u defnyddio, tymheredd yr ystafell, ac a oes cwpwrdd, oergell, llenni ac ati, wedi'i adael ar agor.