def get_humidity(self):
"""Reads the humidity from the sensor. This call blocks
for 250ms to allow the sensor to return the data"""
self.transaction(
writing_bytes(self._I2C_ADDRESS,
self._CMD_HUMIDITY_NO_HOLD))
time.sleep(0.250)
data = self.transaction(reading(self._I2C_ADDRESS, 3))[0]
if _calculate_checksum(data, 2) != data[2]:
raise ChecksumFailedError("Humidity checksum failed.")
else:
return _get_humidity_from_buffer(data)
def get_temperature(self):
"""Reads the temperature from the sensor. This call blocks
for 250ms to allow the sensor to return the data.
"""
self.transaction(
writing_bytes(self._I2C_ADDRESS,
self._CMD_TEMPERATURE_NO_HOLD))
time.sleep(0.250)
data = self.transaction(reading(self._I2C_ADDRESS, 3))[0]
if _calculate_checksum(data, 2) != data[2]:
raise ChecksumFailedError("Temperature checksum failed.")
else:
return _get_temperature_from_buffer(data)
def reset(self):
"""Resets the SHT12."""
self.transaction(
writing_bytes(self._I2C_ADDRESS, self._CMD_SOFTRESET))
time.sleep(0.050)
