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A microcontroller board based on the ATmega32u4 with built-in USB communication.

2
votes
I've used following code and loopback from pin 8 to pin 7: // loopback: pin 8 -> pin 7 void setup() { pinMode(7, INPUT_PULLUP); pinMode(8, OUTPUT); pinMode(LED_BUILTIN_TX, OUTPUT); // to see …
answered Jul 20 '16 by KIIV
2
votes
There is no real reason why it should be tied somehow. And running simple test program seconds that: void setup() { pinMode(0, OUTPUT); pinMode(1, OUTPUT); Serial.begin(9600); } void loop() { …
answered Jun 24 '17 by KIIV