Calibrating Temperature, Pressure, Humidity scales (Grow, and others?)

[ExperiMentor]

There was previous discussion that ability to calibrate readings would be useful, as the raw readings can be some way off.

Presently, I';ve tweaked enviro/boards/grow.py as below, but it would surely be better done in config.py (and similar likely applies to ther boards?)

def get_sensor_readings():

bme280 returns the register contents immediately and then starts a new reading

we want the current reading so do a dummy read to discard register contents first

bme280.read() time.sleep(0.1) bme280_data = bme280.read() adj_temp = bme280_data[0] - 2.0 adj_press = (bme280_data[1] / 100.0) + 5.4 adj_humidity = bme280_data[2] + 11.0

ltr_data = ltr559.get_reading()

moisture_levels = moisture_readings()

water(moisture_levels) # run pumps if needed

from ucollections import OrderedDict

return OrderedDict({ "temperature": round(adj_temp, 2), "humidity": round(adj_humidity, 2), "pressure": round(adj_press, 2), "luminance": round(ltr_data[BreakoutLTR559.LUX], 2),

[ZodiusInfuser]

Thanks for suggesting this! I assume the 2.0, 5.4 etc are your offset values in the above code?

[ExperiMentor]

Yes, -2.0, +5.4 and +11.0 [note: signs are needed] are the offset values I found helpful, but would be better placed in config.py