void setup() { Serial.begin(9600); } void loop() { Serial.print("Temp "); Serial.print("\n"); delay(1000); } This simple code causes my Arduino Uno to continuously transmit data (TX led alway on) unless I open a serial monitor (it doesn't matter if I use the one in the Arduino …

Arduino Uno - Serial Communication Problem

jumpjack October 27, 2010, 1:05pm 7

Why should I connect RX/TX to a serial/USB converter connected to a serial port, if I can directly connect RX/TX to USB?

Has USB standard TTL levels?

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