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Technical Data / Periodic Maintenance
Update Rate and Accuracy
Each element on the home page is reported to the precision available. Temperature is reported to the
nearest 1/10 of a degree and is accurate to +/- 1/2 a degree C.
Relative Humidity is reported to the nearest percent, and Water Level to the nearest 1/10 of an inch.
Your GroBot will do her best to let you know when a sensor isn’t to be believed by showing ???
onscreen.
pH is reported to the nearest 1/10 of a point
Nutrient level is reported as Total Dissolved Solids in parts per million to the nearest 10 ppm.
This is calibrated using whatever solutions you used, typically the NaCl scale, where PPM = 500 *
EC.
CO2 is also reported to the nearest 10 PPM.
Sensors are sampled at 40 Hz, and updated onscreen every five (5) seconds.
Software Updates
Your GroBot comes with a boot-loader to keep itself up to date with the latest PurGro firmware. See
the
Update
section on the Setup screen for details.