RFID breakout board

Other Miscellaneous
1

Hi, I have an RFID breakout board and ID-12LA module.

I am trying to connect to a board running Circuit Python, using UART.

I get serial output (and wired an LED to the read pin which confirms reading a tag), but when I try to convert ‘bytearray’ to string using:

data_string = ''.join([chr(b) for b in data])
        print(data_string, end="")

I get:

?ÌÌæææÌù2*>*ÊÖò

And if I don’t convert, I get:

b’?\xcc\xcc\xe6\xe6\xe6\xcc\xf92*>*\xca\xd6\xf2\x00’

How should I be converting the data coming in?

I’ve changed baud rates, and the output remains the same.

2

This type of garbage usually occurs due to baud rate mismatch. I mean, you define one baud rate in your code but select another in the serial monitor. Make sure that you’re following this hookup guide meticulously:

https://learn.sparkfun.com/tutorials/sp … 1641299999

If nothing works, perhaps you need a replacement.

3

Yeah I looked at that, played around with RealTerm and tried all the baud rates… and I am still getting odd caracters.

Any idea what the encoding is on the raw data coming from the RFID reader?

4

I actually looked for the datasheet and saw it’s manchester 64bit.

5

So I have tried using Arduino and CircuitPython, on boards running ESP32, and an SAMD chip… and nothing works to get proper ASCII output.

I have 2 breakout boards with 2 ID-12LA modules and tried both, with the same results…