A raspberry pi zero (£5), 1 wire adapter (£15, could probably be cheaper) and DS18B20's at £1 each and you can have 60 data loggers logging every minute and storage of data points for years! Pretty graphs, everything!
posted 2 years ago
The cheapo data logger is still working as advertised.
Very interested in the raspberry solution also...
Are there any how-to videos on how to put one of those together?