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Author Topic: RX/TX pin not blinking  (Read 661 times)
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Patouf
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« on: January 31, 2013, 12:02:57 pm »
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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?
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hiduino
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« Reply #1 on: January 31, 2013, 09:33:11 pm »
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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.
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Patouf
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« Reply #2 on: January 31, 2013, 11:26:09 pm »
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Thanks for your answer smiley But what are the tx/rx led for if they do not blink when I use the serial (not the one on usb)?
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