Is it possible to up the data resolution, currently its only measuring to half a degree. Whilst most of the time that fine, it does not work for alarms, half a degree is the difference in temp I need to use to create an alarm for when our stream floods. But what happens now is that due to rounding up or down its constantly going into alarm with a small change say 8.25-8.35.
I believe that is a limitation of either the equipment or the DS's 1-wire protocol implementation. Mango just uses the values that it receives. I'd suggest you ask your equipment supplier for confirmation of this.
There are two applications that I have used before Log Temp by Mr Soft and Lampomittari both of which give data to 2 decimal places.
On the Dallas site the spec sheet for a ds18s20 says accurate to 0.5C' is it something to do with the temperature resolution needing to be configured which the spec sheet also gives, or is that something else completly ?
My apologies: you are correct. Devices optionally support multiple temperature resolutions. Unfortunately, Mango does not currently facilitate the setting of device-level configuration options. Perhaps in a later release...