System monitoring

Most of the system here runs on Raspberry PI's and native IP devices (like internet connected radio's and a TV with an IP connection). Besides logging human activity the system also keeps track of itself (temperatures, CPU & memory usage etc). 

RaspberryLast readingCurrent temperatureLowest temp.Highest temp.
Attic Raspberry CPU30-Apr-2017 12:43:1150.3028.2056.61
Databaseserver30-Apr-2017 12:42:550.000.0012.00
Garage Raspberry CPU30-Apr-2017 12:41:4342.2024.1261.68
Livingroom Raspberry CPU30-Apr-2017 12:40:2340.1031.7453.27
Raspberry Doorbell CPU30-Apr-2017 12:41:3638.5034.3445.48
Study Raspberry CPU30-Apr-2017 12:44:2556.9026.1082.92
Utility Closet Raspberry CPU30-Apr-2017 12:40:5754.1047.9461.89