import smbus2
import RPi.GPIO as GPIO
import time

"""
>>> bus = smbus2.SMBus(1)
>>> ans = bus.write_byte(0x44, 0xFD)
>>> smbus2.i2c_msg.read(0x44,6)
i2c_msg(68,1,b'\x00\x00\x00\x00\x00\x00')
>>> taa=smbus2.i2c_msg.read(0x44,6)
>>> bus.i2c_rdwr(taa)
>>> data = list(taa)
>>> print(data)
[112, 174, 89, 60, 78, 165]
"""

def main():
    i2cbus = smbus2.SMBus(1)
    addressSHT40 = 0x44
    meas_sht40(i2cbus, 0x44)


        
def meas_sht40(bus, addressSHT40):
    CMD_measure = 0xFD #cmd de mesure
    #bus.write_byte(0x00, 0x06)
    #time.sleep(1.1)
    bus.write_byte(0x44, 0x39)
    time.sleep(1.1)
    while 1:
        time.sleep(1.1)
        #data = bus.read_i2c_block_data(0x44, 0, 6) #Lecture des 6 octets
        data = []
        
        bus.write_byte(0x44, 0xFD)
        byte = bus.read_block_data(0x44,3)
        data.append(byte)
        print(f"Octet {i}: {byte:#04x}")
        time.sleep(1.15)
        
        #print(data)
        
        """
        temp_raw = (data[0] << 8) + data[1]
        humidity_raw = (data[3] <<8) + data[4]
        """
        temperature = 10000*(data/65535.0)
        #temperature = -45 + 175*data/65535
        #print(temperature)
    

if __name__=="__main__":
    main()