init

Humidity.py

@@ -0,0 +1,53 @@
+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()