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* changed shield examples * changed shield links * added example text * added getting-started * added getting started * upate shield getting started * add new examples * add sleep and scan examples * update links * changed links to release
1.5 KiB
1.5 KiB
Title
| Title |
|---|
| Scanning |
This example can be used on the Pyscan
You can use the example below to scan RFID / NFC cards presented to the scanner:
from pyscan import Pyscan
from MFRC630 import MFRC630
import time
import pycom
import _thread
VALID_CARDS = [[0x43, 0x95, 0xDD, 0xF8],
[0x43, 0x95, 0xDD, 0xF9]]
py = Pyscan()
nfc = MFRC630(py)
RGB_BRIGHTNESS = 0x8
RGB_RED = (RGB_BRIGHTNESS << 16)
RGB_GREEN = (RGB_BRIGHTNESS << 8)
RGB_BLUE = (RGB_BRIGHTNESS)
# Make sure heartbeat is disabled before setting RGB LED
pycom.heartbeat(False)
# Initialise the MFRC630 with some settings
nfc.mfrc630_cmd_init()
def check_uid(uid, len):
return VALID_CARDS.count(uid[:len])
def discovery_loop(nfc, id):
while True:
# Send REQA for ISO14443A card type
atqa = nfc.mfrc630_iso14443a_WUPA_REQA(nfc.MFRC630_ISO14443_CMD_REQA)
if (atqa != 0):
# A card has been detected, read UID
uid = bytearray(10)
uid_len = nfc.mfrc630_iso14443a_select(uid)
if (uid_len > 0):
if (check_uid(list(uid), uid_len)) > 0:
pycom.rgbled(RGB_GREEN)
else:
pycom.rgbled(RGB_RED)
else:
# No card detected
pycom.rgbled(RGB_BLUE)
nfc.mfrc630_cmd_reset()
time.sleep(.5)
nfc.mfrc630_cmd_init()
# This is the start of our main execution... start the thread
_thread.start_new_thread(discovery_loop, (nfc, 0))