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By igoeco2001
#198888
On my AT328 RedBoard (presumed SparkFun part no. DEV-13975) when I run the simplest possible sketch to send serial output:
void setup() {
Serial.begin(9600);
}
void loop() {
Serial.println("Hello World!");
delay(1000);
}
It works fine, but the RX LED flashes with each outputted line, not the TX LED.
On all my other UNO clones, the TX LED flashes, as expected.
Is this unique to me or a known thing?
By paulvha
#198894
looking at the schematics : Output pin from FT231xs : pin 10 is TX led, pin 17 is RX-led.
Looking at the board - Eagle file: led TX is connected to pin 17 and TX to pin 10. So indeed it looks to be the opposite.