Monday, November 13, 2017

Flexi1 - Long Term Test

Flexi1 - Long Term Test

The Flexi1 in the flower bed outside the office has been running for about 230 days. It is using 4 x AA Lithium batteries. 



It is setup in a Typical Aquacheck configuration:
  • Take a probe reading every 30 min
  • Upload it every 3 hours
  • Get a GPS fix every 24 hours
We added an external temperature sensor, so it is also:
  • Reading the temp sensor every 30 min
The main encouraging take away is the number of uploads so far. 1832 uploads means about 230 days. Not bad for 4 x AA's. They're probably close to flat now, but they're still going, so we'll see how much more we get. Using 4 x C Cell Alkalines would give you roughly double this capacity.

I graphed the temperatures in Telematics Guru. It doesn't get that cold in Jo'burg - about 2.8 degrees C. There is some direct sun on the housing at mid-day, hence the 47 degrees C maximum. Interesting how close they are together - min on the 25th of August and max on the 13th of September. I wouldn't read too much into the max, as the directness of the sun makes a big difference. Not the clearest graph out, because of the swings from night to day, with the added heating effect of direct sun.
Telematics Guru Asset Analogue Graph - Temperature vs Time 

Here is a screen shot of Aquacheck Web. They do the agronomy magic with the telemetry we collect. Here is the data plotted from March to November. Again, you can't read too much into it because of the unknown water habits of our office park, but it's great to visualise the data. Of course, visualisations are cool, but how do you commercialise this? Ask Aquacheck about the science of Agronomy...
Aquacheck Web - Soil Moisture Content vs Time

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