# FreeRTOS Common IO V0.1.2
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import smbus

if __name__ == "__main__":
    channel = 1
    device_addr = 0x18
    ambient_temp_reg = 0x5

    bus = smbus.SMBus(channel)

    data = bus.read_i2c_block_data(device_addr, ambient_temp_reg, 2)

    temp = float((data[0] << 8 | data[1]) & 0xFFF) / 16

    if data[0] & 0x10:
        temp -= 256.0

    print(temp)