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from .base import I2CTempHumSensor
class Si7021(I2CTempHumSensor):
i2c_addr = 0x40
def temperature(self) -> float:
raw = self.bus.read_i2c_block_data(self.i2c_addr, 0xE3, 2)
return 175.72 * (raw[0] << 8 | raw[1]) / 65536.0 - 46.85
def humidity(self) -> float:
raw = self.bus.read_i2c_block_data(self.i2c_addr, 0xE5, 2)
return 125.0 * (raw[0] << 8 | raw[1]) / 65536.0 - 6.0
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