I'm currently using a arduino nano.
It has the usb port, which think it uses RX1 TX0 as default TTL output.
Board has also RX0 TX1 pins.
And I'm trying to send data to a PNA through them...but sometimes it works. Sometimes don't.
What is confusing!
Do I need to define on code which pins Serial.print() will send data?
I've searching for information, but everything looks too complex.
I only need to send a data string through that pins!
Thank you so much!