@paopao Hi! If using UIFlow, then this is it, if it‘s Arduino. Serial port sending commands or use API， then CH_index = 1 [image: 1654054725635-0ec00c90-ec5d-4409-94fc-8dd08c895076-772b8705d595ffaaf664b365dfa2283-resized.png] [image: 1654054732923-ba3533da-f619-4abc-911a-0eec1f118a04-7a340fb489da51d7a3242baec51cccb-resized.png] https://github.com/m5stack/M5Stack/blob/master/examples/Unit/UHF_RFID_JRD4035/RFID_command.cpp [image: 1654054742057-08d5a35d-3ca2-4e2f-bfb2-00ff3e69579b-4bca5f4ba3a089a03c27cc592164b60.png]

Hi Paopao, I am in your same situation, I have been trying to communicate UHF-RFID-UNIT with Aton Lite and I don't know the right code. Could you spend the code to start my project? Thank you

@m5stack san, Thank you very much for your kindly reply!

Hi Paopao, I am in your same situation, I have been trying to communicate UHF-RFID-UNIT with Aton Lite and I don't know the right code. Could you spend the code to start my project? Thank you