def __init__(self):
# i2c bus configuration
self.i2c = busio.I2C(board.SCL, board.SDA)
# PN532 creation
self.pn532 = PN532_I2C(self.i2c, debug=False)
# Configure PN532 to communicate with MiFare cards
self.pn532.SAM_configuration()
GPIO.setmode(GPIO.BCM)
import board
import busio
from digitalio import DigitalInOut
from adafruit_pn532.i2c import PN532_I2C
# I2C connection:
i2c = busio.I2C(board.SCL, board.SDA)
# keep trying to initialise the sensor
while True:
try:
# Non-hardware reset/request with I2C
pn532 = PN532_I2C(i2c, debug=False)
ic, ver, rev, support = pn532.firmware_version
print("Found PN532 with firmware version: {0}.{1}".format(ver, rev))
break
except:
print("failed to start RFID")
sleep(1)
# this delay avoids some problems after wakeup
sleep(0.5)
# Configure PN532 to communicate with MiFare cards
pn532.SAM_configuration()
non_poisoned_cards = ['PSB', 'PDT', 'PZK', 'PTB']
poisoned_cards = ['PVM', 'PSV']
# from adafruit_pn532.spi import PN532_SPI
# from adafruit_pn532.uart import PN532_UART
# I2C connection:
i2c = busio.I2C(board.SCL, board.SDA)
# Non-hardware
# pn532 = PN532_I2C(i2c, debug=False)
# With I2C, we recommend connecting RSTPD_N (reset) to a digital pin for manual
# harware reset
reset_pin = DigitalInOut(board.D6)
# On Raspberry Pi, you must also connect a pin to P32 "H_Request" for hardware
# wakeup! this means we don't need to do the I2C clock-stretch thing
req_pin = DigitalInOut(board.D12)
pn532 = PN532_I2C(i2c, debug=False, reset=reset_pin, req=req_pin)
# SPI connection:
# spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
# cs_pin = DigitalInOut(board.D5)
# pn532 = PN532_SPI(spi, cs_pin, debug=False)
# UART connection
# uart = busio.UART(board.TX, board.RX, baudrate=115200, timeout=0.1)
# pn532 = PN532_UART(uart, debug=False)
ic, ver, rev, support = pn532.firmware_version
print("Found PN532 with firmware version: {0}.{1}".format(ver, rev))
# Configure PN532 to communicate with MiFare cards
pn532.SAM_configuration()
import board
import busio
from digitalio import DigitalInOut
from adafruit_pn532.i2c import PN532_I2C
import feathers2
import time
feathers2.enable_LDO2(True)
i2c = busio.I2C(board.SCL, board.SDA)
irq_pin = DigitalInOut(board.D19)
pn532 = PN532_I2C(i2c, debug=False, reset=DigitalInOut(board.D18), irq=irq_pin)
pn532.SAM_configuration()
foo = pn532.listen_for_passive_target()
current = None
print("Waiting for RFID/NFC card...")
step = 0
while True:
# Check if a card is available to read
if irq_pin.value == 0:
uid = pn532.get_passive_target()
if current != uid:
print("")
print("Found card with UID:", [hex(i) for i in uid])
data = bytearray()
try:
for x in range(40):
incoming = pn532.ntag2xx_read_block(x)
for byt in incoming:
data.append(byt)
except:
def __init__(self):
self._reader = PN532_I2C(busio.I2C(board.SCL, board.SDA))
self._reader.SAM_configuration()
import board
import busio
import hx711
import websockets
from adafruit_pn532.i2c import PN532_I2C
# Constants
REFERENCE_UNIT = -2053.4638810934416
NFC_PIN_1 = 5
NFC_PIN_2 = 6
NR_SCALE_READS = 5
API_URL = 'ws://89.212.198.159:8000/ws/'
# Setup nfc reader
i2c = busio.I2C(board.SCL, board.SDA)
pn532 = PN532_I2C(i2c)
pn532.SAM_configuration()
# Setup scale sensor.
hx = hx711.HX711(NFC_PIN_1, NFC_PIN_2)
hx.set_reading_format("MSB", "MSB")
hx.reset()
hx.tare()
hx.set_reference_unit(REFERENCE_UNIT)
# Connect to server with socket
async def loop():
async with websockets.connect(API_URL) as sock:
while True:
# Read tag and weight.