Serial LCD Kit ( LCD-10097 ROHS)

Kits
1

I have a question. I assembled this kit, and everything seems to work except for my D10 Pin.

I’m trying to interface this kit with a GT511C1R TTL Fingerprint scanner. The pins I was using were D10 + D11 (FPS Tx and FPS Rx). I could not get it to work with those 2 pins so I switch them to D11 + D12, respectively. Changed the pins in the code and it started working.

What am I doing wrong?

2

Hi WJT507,

I am not sure why you would not be able to use D10 for SoftwareSerial (assuming that is what you are using for serial communication on the digital pins). The Serial LCD Kit uses the Duemilanove/Nano serial bootloader and SoftwareSerial should work on any available digital pin. My only guess is there is a connection problem on D10 so maybe try inspecting that solder joint to make sure it is connected properly.

If your solder joint looks okay, try testing the D10 pin with something like an LED to see if you can toggle it on and off.