poc.py

from zk import ZK, const
import json
import datetime

# ip="192.168.1.201"
# port=4370
ip="0.tcp.in.ngrok.io"
port=13296

timeout=30

#  Sample Attendance Logs [{'punch': 255, 'user_id': '22', 'uid': 12349, 'status': 1, 'timestamp': datetime.datetime(2019, 2, 26, 20, 31, 29)},{'punch': 255, 'user_id': '7', 'uid': 7, 'status': 1, 'timestamp': datetime.datetime(2019, 2, 26, 20, 31, 36)}]
zk = ZK(ip, port=port, timeout=timeout)
print("Connecting to device... {}:{}".format(ip, port))
conn = None
attendances = []
try:
    conn = zk.connect()
    x = conn.disable_device()
    # device is disabled when fetching data
    print("\t".join((ip, "Device Disable Attempted. Result:", str(x))))
    attendances = conn.get_attendance()
    print("\t".join((ip, "Attendances Fetched:", str(len(attendances)))))
    print(attendances[0:10])

    # map attendances to a dict
    f = open("data.json", "w")
    f.write(json.dumps(list(map(lambda x: x.__dict__, attendances)), default=datetime.datetime.timestamp))
    f.close()   
except:
    print(str(ip)+' exception when fetching from device...')
    raise Exception('Device fetch failed.')
finally:
    if conn:
        conn.disconnect()

# return list(map(lambda x: x.__dict__, attendances))