Analyzing UART signals

arduino uno uart logic analyzer saleae

View the decoded asynchronous serial signal from the graph produced by Saleae.

Capture the signal in Saleae:

All signals

Add asynchronous serial to decode the captured signal:

Decoded asynchronous serial signals

Code

Download code
void setup() {
  Serial.begin(9600);
  delay(1000);
}

void loop() {
  Serial.println("hello");
  delay(2000);
}

Schematic

Wire up the hardware accordingly

Analyzing UART signals schematic

References