I found this code from Send data from a computer to an Arduino - Suffix int ledPin = 13; void setup() { Serial.begin(9600); pinMode(ledPin, OUTPUT); } void loop() { if (Serial.available() > 0) { char value = Serial.read(); if (value == '1') { digitalWrite(ledPin, HIGH); } …

Keep variable value until serial input is changed

system January 6, 2013, 10:20pm 7

PaulS:
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