結局

ICカードで施錠 https://qiita.com/carpenders/items/94d29098127faaffe1fc

source code

#!/usr/bin/python
# -*- coding: utf-8 -*-

import binascii
import nfc
import pigpio
import time

PIN_INP = 17
PIN_PWM = 18

push = 0

def cb_up(gpio, level, tick):
	global push
	#print gpio, level, tick

def cb_down(gpio, level, tick):
	global push
	if push == 0:
		push = 1
		print "button", gpio, level, tick

def on_startup(target):
	print "on_startup"
	return target

def on_connect(tag):
	print "on_connect"
	print tag
	# return False # break connect
	return True # keep connect

def on_release(tag):
	print "on_release"

def connect(clf):
	clf.connect(rdwr={
		'on-startup': on_startup,
		'on-connect': on_connect,
		'on-release': on_release
	})
	print "connect end"

idlist = { \
	'xxxxxxxxxxxxxxxx': 'n', \
	'xxxxxxxxxxxxxxxx': 'y', \
	}

def unlock_lock(pi):
	w1 = 1000
	w2 = 2000
	pi.set_servo_pulsewidth(PIN_PWM, w2)
	time.sleep(1)
	pi.set_servo_pulsewidth(PIN_PWM, w1)
	time.sleep(1)
	pi.set_servo_pulsewidth(PIN_PWM, 0)

def sense(pi, clf):
	global push
	while True:
		target_req = nfc.clf.RemoteTarget("212F")
		target_res = clf.sense(target_req, iterations=1, interval=0.1)
		if target_res != None:
			#print "res", binascii.hexlify(target_res.sensf_res)
			tag = nfc.tag.activate_tt3(clf, target_res)
			#print "tag", tag
			idm = binascii.hexlify(tag.idm)
			pmm = binascii.hexlify(tag.pmm)
			#print "idm", idm, "pmm", pmm
			hit = 0
			yes = 0
			for k, y in idlist.items():
				if idm == k:
					hit = 1
					if y == 'y':
						yes = 1
					break
			if hit != 0 and yes != 0:
				print "accept", idm
				unlock_lock(pi)
			else:
				print "ignore", idm
				time.sleep(1)
		if push == 1:
			unlock_lock(pi)
			push = 0

def main():
	pi = pigpio.pi()
	pi.set_mode(PIN_INP, pigpio.INPUT)
	pi.set_pull_up_down(PIN_INP, pigpio.PUD_UP)
	cbu = pi.callback(PIN_INP, pigpio.RISING_EDGE, cb_up)
	cbd = pi.callback(PIN_INP, pigpio.FALLING_EDGE, cb_down)
	clf = nfc.ContactlessFrontend('usb')
	if clf:
		print clf
		try:
			sense(pi, clf)
		except KeyboardInterrupt:
			pass
		clf.close()
	pi.set_mode(PIN_PWM, pigpio.INPUT)
	pi.stop

if __name__ == '__main__':
	main()