@zboblamont That is impressive, I thought more than 6 months is somewhat of a black magic trick due to the energy used to send stuff. I think my main mistake was using normally closed reed switches back than. Not knowing that there are normally open switches as well. How does this "every 10 liters" thing work using a reed switch? Am I misunderstanding something?
@eelledge That are some interesting ideas, I will definitely dig into this area.