Étape 2: Ajout d’un script de protocole Kwikset
Maintenant, ouvrez un nouveau document et nommez-le kwikset_protocol.py à l’aide de la commande suivante
#!/usr/bin/python# This is a library for providing access to Kwikset Smartcode Locks via UART # The h/w interface is 3.3V 9600 baud 8N1 standard UART # This is more of a protocol encoder/decoder though# You can find more information at randomwire.bizfrom binascii import hexlify,unhexlifypkt_count = 0NO_DATA = '' LOCK_CMD = 'e703' UNLOCK_CMD = 'e705' INIT_CMDS = ('e707','e74d','e702','e70a','e718','e709','e742','e70f') INIT_DATAS = ('','','','','','','01010101','15031301471205') PARSE_LOOKUP = {'e709':"parse_initack",'e727':"parse_lockstatus",'e729':"parse_newlockcode",'e742':"parse_error"}def generate_packet(cmd,data): global pkt_count pkt_count += 1 length = (len(cmd+data)/2)+2 base_pkt = "%0.2x%0.2x" % (length,pkt_count)+cmd+data pkt = "bd"+base_pkt+calculate_crc(base_pkt) return pktdef calculate_crc(pkt): crc = int("ff",16) #print "Starting crc = %0.2x"%crc while len(pkt)>1: crc ^= int(pkt[0:2],16) #print "After byte 0x%s, CRC = %0.2x, Len=%d"%(pkt[0:2],crc,len(pkt)) pkt = pkt[2:] return "%0.2x"%crcdef validate_crc(pkt): if calculate_crc(pkt) == '00': return True else: return Falsedef parse_packet(pkt): if pkt[0:2] != 'bd': print "Bad packet header" return False if not validate_crc(pkt[2:]): print "Bad packet CRC" return False if ((len(pkt)/2)-2) != int(pkt[2:4],16): print "Bad packet length" return False cmd = pkt[6:10] data = pkt[10:-2] print "Found cmd=%s & data=%s"%(cmd,data) if cmd in PARSE_LOOKUP: parse = globals()[PARSE_LOOKUP[cmd]] return parse(data) return Truedef parse_initack(data): if data == '64': return True else: return False def parse_lockstatus(data): code_used = int(data[2:4],16) status_bits = int(data[4:6],16) if status_bits & 0x80: cause = "Remote Control" elif status_bits & 0x40: cause = "Code %d Entered"%(code_used) elif status_bits & 0x20: cause = "Automatic Lock" else: cause = "Manual/Key" if status_bits & 0x02: lock_state = "Unlocked" elif status_bits & 0x01: lock_state = "Locked" else: lock_state = "Unknown" return (lock_state,cause) def parse_newlockcode(data): return datadef parse_error(data): return datadef generate_init_packet(num): return unhexlify(generate_packet(INIT_CMDS[num],INIT_DATAS[num]))def generate_lock_packet(): return unhexlify(generate_packet(LOCK_CMD,''))def generate_unlock_packet(): return unhexlify(generate_packet(UNLOCK_CMD,'')) Dans ce cas, j’ai utilisé vi, mais vous pouvez toujours installer et utiliser nano ou tout autre éditeur de texte de votre choix.
C’est le script qui va contenir toutes les commandes permettant de communiquer avec votre serrure Kwikset sur UART.
Collez le code suivant dans votre fichier, enregistrez votre fichier, puis fermez votre éditeur de texte.
vi kwikset.py
