Hi, Im thinking of using the ruuvitag for the similar purpose. Right now the tag is measuring the hive and i can go and get the readings by visiting the hive. The goal is to eventually get a pi running which would log the readings and send them to a server so i could get the reading from home and from multiple hives and locations simultaneously. The tag has a sensor to monitor movement? which could be activated by updating the firmware so that the tag would report if bears get to the hive. The scale would be nice addon too but maybe harder to implement, that is if I don`t find a ready made scale which would use ble.
Also maybe desibel measurement could be useful if the aim was to monitor the development of a swarm? I think by analysing the temperature we could maybe already get a idea when the swarm is forming. Ideal would be that the analysis would be made automatically server side and I would get a txt or email warning of movement or of the swarm. There are similar products already but I really think they are way too expensive.
I am interested in your solar panels and if they suffice for the pi. The pi3 uses more power than the new pi zero so it could be more suitable for this. I am trying to get by as cheaply as possible and maybe even so that the pi unit and scale?(and the solar power) would be integrated in one of the populated hives.