Fingerprint scanner FPS_GTC511C3 and SAMD21 ProRF

Wireless & IoT LoRa (Long Range)
1

Hello.

I’m triying to communicate a fingerprint scanner (https://learn.sparkfun.com/tutorials/fi … 1669155455) with SAMD21-RFM95. The fingerprint scanner library gives an error related to SoftwareSerial.

Is there any way to make both devices work together?

Thanks!!

2

The SAMD21 doesn’t have SoftwareSerial available; switch those lines in the code over to regular Serial and it should work :slight_smile:

(you might need to use an older version of Arduino IDE, not certain…I haven’t updated mine yet)

3

Thanks for your reply. SoftwareSerial is into FPS_GTG511C3 library.

You mean edit the library by removing all instructions that call SoftwareSerial and connect TX / RX from FPS to any serial port in SAMD?

Thanks!!

4

Yea just change them definitions/calls to ‘Serial’ instead of ‘SoftwareSerial’ - there’s a lot more info if you google the situation (SAMD21 SoftwareSerial) to see other folks’ similar issues/solutions

5

OK.

I replaced “SoftwareSerial.h” with “Serial.h” in FPS_GTG511C3.h library…and now the error is:

Serial.h: No such file or directory

13 | #include “Serial.h”

The solution is to delete all softwareserial calls in FPS_GTG511C3.h library and directly connect the TX and RX pins of the sensor to the TX1 and RX0 pins of the SAMD?

6

Start over…google “software serial vs hardware serial arduino” and you’ll see examples of posts doing similar

The solutions is to CHANGE/UPDATE the calls to regular serial, not delete them