proxmark3.py

import pexpect
import datetime

child = pexpect.spawn('proxmark3 /dev/cu.usbmodem1411')
child.expect('proxmark3> ')
child.sendline('hf mf rdbl 5 a 000000555555')
child.expect('proxmark3> ')
x = str(child.before)
x = ''.join(x.strip().split()[-17:-1])

if x[:4] == 'data':
    x = x[5:]
    t = datetime.datetime.now()
    s = t.strftime('%M%H%d%m%y')
    y = x[:15] + s + x[25:]
    child.sendline('hf mf wrbl 5 a 000000555555 {}'.format(y))
    child.expect('proxmark3> ')

    child.sendline('hf mf rdbl 5 a 000000555555')
    child.expect('proxmark3> ')

    nx = str(child.before)
    nx = ''.join(nx.strip().split()[-17:-1])
    nx = nx[6:]
    print(nx)