Thank you for your feedback.
The code generated by the UIflow example from my last screenshot is the following:
from m5stack import *
from m5ui import *
from uiflow import *
uart1 = machine.UART(1, tx=14, rx=13)
uart1.init(9600, bits=8, parity=None, stop=1)
lcd.print((uart1.read()).decode(), 0, 0, 0xff0000)
Do I need to add something else to this code to receive any signal from the reader ?
Do tyou mean UIFlow requires additional libraries to be able to communicate over serial (UART) ?
Thank you for your help