Trying to do a constant read with the SparkFun M6E Nano and a Raspberry Pico about sparkfun_simultaneous_rfid_tag_reader_library

[sfe-SparkFro]

Hi there! I just tested this on a Pico W, and it appears to work with the hardware serial example (haven't tested software serial, but hardware is arguably better anyways). Just need to make sure you specify the correct UART bus and pins for your project:

Take a look at the Function Select table of the RP2040 datasheet (Table 278, page 237 as of writing). The F2 column specifies which pins and UART bus can be used with each pin (only some pins support TX and RX). Assuming you're using Earle Philhower's arduino-pico core, UART0 and UART1 correspond to Serial1 and Serial2 respectively.

So to get it working, first figure out which pins you want to use. Then open the hardware serial example (under the Advanced folder) and replace all instances of Serial5 with Serial1 or Serial2 (depending on which pins you're using, I'm just going to call it SerialN for here on). Then before SerialN.begin() (line 118), add SerialN.setTX() and SerialN.setRX(), and pass in the pin numbers you want to use.

For example, I used pins 20 and 21 for my TX and RX respectively, which support UART1, or Serial2. So I replaced all instances of Serial5 with Serial2, and added the following

...

Serial2.setTX(20);
Serial2.setRX(21);

Serial2.begin(baudRate);

...

I hope this helps! Going to close this since it doesn't appear to be an issue with this library. Please feel free to reply if you're still having trouble, or reopen if you believe there really is a problem with this library. Thank you!