Cannot write to RFID tag

[Rusticus42]

Hi!

I experimenting with the RFID 2 unit. Therfore I have connected the RFID Unit to a M5DinMeter.
I am using UIFlow 2, but I am able to understand the python code as well.

So far I am able to check if a RFID tag is present on the unit. If so I read the UID.
Now I want to write some specific values to an adress of the RFID tag, but it fails.

The return value of the UIFlow Block "write buffer" is always 0.
I am not shure if I understand the adressing correctly.
So far I just used the value 1 for adress, expecting to "point" to the first writeable Byte Array.

I am pretty sure that my code is not very nice, but maybe someone is able to identy the problem.

Thanks!

==============================================================
import os, sys, io
import M5
from M5 import *
from hardware import I2C
from hardware import Pin
from unit import RFIDUnit

label0 = None
label1 = None
label2 = None
label3 = None
i2c0 = None
rfid_0 = None

int_RfNewCard = None
ByteARR_UID = None
ByteArr_RfidGet = None
i = None
Byte_UidPart = None
Str_UID = None
ByteArr_Buffer = None
int_RfWriteResult = None

def setup():
global label0, label1, label2, label3, i2c0, rfid_0, int_RfNewCard, ByteARR_UID, ByteArr_RfidGet, Byte_UidPart, i, Str_UID, ByteArr_Buffer, int_RfWriteResult

M5.begin()
Widgets.fillScreen(0x000000)
label0 = Widgets.Label("label0", 5, 5, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu18)
label1 = Widgets.Label("label1", 5, 32, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu18)
label2 = Widgets.Label("label2", 6, 59, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu18)
label3 = Widgets.Label("label3", 7, 90, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu18)

i2c0 = I2C(0, scl=Pin(15), sda=Pin(13), freq=100000)
rfid_0 = RFIDUnit(i2c0)
M5.Lcd.setRotation(1)
Widgets.setRotation(1)
label0.setVisible(False)
label1.setVisible(False)
label2.setVisible(False)
label3.setVisible(False)

def loop():
global label0, label1, label2, label3, i2c0, rfid_0, int_RfNewCard, ByteARR_UID, ByteArr_RfidGet, Byte_UidPart, i, Str_UID, ByteArr_Buffer, int_RfWriteResult
M5.update()
int_RfNewCard = rfid_0.is_new_card_present()
if int_RfNewCard:
ByteARR_UID = rfid_0.read_card_uid()
ByteArr_RfidGet = rfid_0.read(2)
for i in range(1, 5):
Byte_UidPart = ByteARR_UID[int(i - 1)]
if i == 1:
Str_UID = f'{Byte_UidPart:0X}'
else:
Str_UID = (str(Str_UID) + str('-'))
Str_UID = (str(Str_UID) + str((f'{Byte_UidPart:0X}')))
rfid_0.close()
if BtnA.wasClicked():
print('Button')
if rfid_0.is_new_card_present():
print(rfid_0.is_new_card_present())
print(ByteARR_UID)
print(ByteArr_RfidGet)
print(Str_UID)
ByteArr_Buffer = bytearray(16)
ByteArr_Buffer[0] = 127
ByteArr_Buffer[1] = 128
print(ByteArr_Buffer)
int_RfWriteResult = rfid_0.write(1, ByteArr_Buffer)
print(int_RfWriteResult)
rfid_0.close()

if name == 'main':
try:
setup()
while True:
loop()
except (Exception, KeyboardInterrupt) as e:
try:
from utility import print_error_msg
print_error_msg(e)
except ImportError:
print("please update to latest firmware")