Arduino Forum

Products => Arduino Due => Topic started by: Patouf on Jan 31, 2013, 06:02 pm

Title: RX/TX pin not blinking
Post by: Patouf on Jan 31, 2013, 06:02 pm
Hi, I just wanted to know if it is normal that my RX/TX leds (those between the two USB ports) are not bliking when I use Serial Communication?
Title: Re: RX/TX pin not blinking
Post by: hiduino on Feb 01, 2013, 03:33 am
Those two are not used for serial communications.  They are connected to digital pins 72 and 73.

The other two Tx/Rx LEDs between the Power Jack and Programming port are used for serial communications on the USB Programming port via the ATmega16U2 chip.

Title: Re: RX/TX pin not blinking
Post by: Patouf on Feb 01, 2013, 05:26 am
Thanks for your answer :) But what are the tx/rx led for if they do not blink when I use the serial (not the one on usb)?