// This is a modification of // hello.t412.echo.ino // // It lets you control an LED from a serial terminal // Set LED pin here int LED = 1; int initiated = 0; static char chr; void setup() { pinMode(LED,OUTPUT); Serial.swap(1); Serial.begin(115200); } void loop() { if(Serial.available() > 0) { if(initiated == 0) { Serial.println("Type 'y' to turn on LED and 'n' to turn off LED."); initiated++; } chr = Serial.read(); if(chr == "y") { digitalWrite(LED,HIGH); Serial.println("Light on!"); } if(chr == "n") { digitalWrite(LED, LOW); Serial.println("Light off!"); } } }