Same for me. Since the rfid reader connected, the internal Speaker make PIEP every time.
I use M5Stack core, with the M5 rfid reader.
With this noise, the complete environment make non-sense...
i have a M5Core device.
Yes, i switch from TX23 -> to TX17, and RX19 -> to 16. Thanks for this tip.
But, now i have a last question, see screenshot below.
I Arduino i write with Serial2.write(...) the Hex. How can i do this in the UIFLOW ?!
Please see screenshots...
Hope you can help me, with my last question...