Since I figure this is a basic device that many will want, is there someone working on making it happen ?
I am thinking an onboard temperature/humidity sensor, with a connector for an external one, maybe only external temperature, maybe using DS18B20 probe.
Access to a few ADC/IO pin terminals would be a plus.
Powered by a few AA(A) or coin cells with 6months-1year lifetime.
And of cause without taking up too much space