My idea is to build an autarkic system which is able to monitor temperature, humidity and send the incurred data via UMTS to a smartphone.
At the Intel Edison temperature and humidity sensors shall be connected such as a UMTS stick via USB.
The Edison collect the data from the sensors and send it to the smartphone on demand.
A Smartphone App pick out the data from the Edison and shows the current values and the statistics.
At a temperature of less than X degree a message is send to the phone.
Thus, one could monitor building sites, to protect them from frost or to detect the necessary dryness for further work without the site to visit.