mh-z19.py

import serial
import time
import sys
import socket
import datetime
 
s = None
sock = None
 
def setup():
    global s
    global sock
    s = serial.Serial("/dev/ttyS0", 9600, timeout=1)
    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) # UDP

def loop():
    b = bytearray([0xFF, 0x01, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00, 0x79])
    #print('q');
    s.write(b)
    time.sleep(1)
    result = s.read(9)
    #print('a', type(result)) 
 
    msg = datetime.datetime.now().isoformat()+","+result.encode("hex")+","+str(ord(result[2])*256+ord(result[3]))+'\n'
    sock.sendto(msg, ("192.168.1.4", 0xC0C0))
    sock.sendto(msg, ("192.168.1.4", 0xC0C1))
    for i in result:
      sys.stdout.write(hex(ord(i)))
      sys.stdout.write(' ')
    sys.stdout.write('\n') 
    sys.stdout.flush
    time.sleep(14)
 
if __name__ == '__main__':
    setup()
    while True:
        loop()