#SHT30 Sensor driver in micropython
The driver has been tested on Wemos D1 mini PRO, but It should work on whatever other micropython board, if anyone find problems in other boards, please open an issue and We'll see.
##Motivation The SHT30 shield for ESP8266 board Wemos D1 Mini has an Arduino driver but not a micropython one.
##Examples of use:
###How to get the temperature and relative humidity:
measure() method returns a tuple with the temperature in celsius grades and the relative humidity in percentage.
If the measurement cannot be performed then an exception is raised (
from sht30 import SHT30 sensor = SHT30() temperature, humidity = sensor.measure() print('Temperature:', temperature, 'ºC, RH:', humidity, '%')
There is another method,
measure_int(), that returns 4 integer values, no floating point operation is done, designed
for environments that doesn't support floating point operations, the four values are:
Temperature (integer part), Temperature (decimal part), RH (integer part), RH (decimal part)
For intance, if the
measure() method returns
(21.5623, 32.0712) the
measure_int() method would return:
(24, 56, 32, 7) The decimal
part is limited to 2 decimal digits.
t_int, t_dec, h_int, h_dec = sensor.measure_int() print('Temperature: %i.%02i °C, RH: %i.%02i %%' % (t_int, t_dec, h_int, h_dec))
Both methods allow a
raw param that when It's
True returns the sensor measurement as-is, It's a
bytearray(6) with the format defined in the sensor datasheet document.
raw_measure = sensor.measure(raw=True) print('Sensor measurement', raw_measure)
###Check if shield is connected
from sht30 import SHT30 sensor = SHT30() print('Is connected:', sensor.is_present())
###Read sensor status
Check the Sensor Datasheet for further info about sensor status register
from sht30 import SHT30 sensor = SHT30() print('Status register:', bin(sensor.status())) print('Single bit check, HEATER_MASK:', bool(sensor.status() & SHT30.HEATER_MASK)) #The status register can be cleared with sensor.clear_status()
###Reset the sensor
The driver allows a soft reset of the sensor
from sht30 import SHT30 sensor = SHT30() sensor.reset()
When the driver cannot access to the measurement an exception
SHT30Error is raised
from sht30 import SHT30 sensor = SHT30() try: t, h = sensor.measure() except SHT30Error as ex: print('Error:', ex)