@Mabande @luca He did not say, he had paid such an amount („fünfstellige Beträge“). He only mentioned, „in the past such an amount would have been paid to develop such a system“. But you‘re right: Either he should have researched more thouroughly to find available open-source tools doing the same (but much more tested + community support) or pay some hundreds to buy a commercial appliance HEMS. But now he only has a „cheap“ proof of concept that „such thing is possible with LLM“ with no support.