好吧，我现在有一个半完整的 Arduino 草图。基本上，如果一串字符等于 *{blink_Flow_A}*，则下面的草图将在 kegboard-mini shield 上闪烁 LED，但是 LED 仅在当前草图加载到 Arduino 时闪烁一次。我希望 Arduino 反复闪烁，直到“停止”命令发送到 Arduino。我最终想打开一个阀门，让它保持打开状态，直到阀门收到关闭命令，然后关闭阀门。草图如下所示，
/*
* kegboard-serial-simple-blink07
* This code is public domain
*
* This sketch sends a receives a multibyte String from the iPhone
* and performs functions on it.
*
* Examples:
* http://arduino.cc/en/Tutorial/SerialEvent
* http://arduino.cc/en/Serial/read
*/
// global variables should be identified with _
// flow_A LED
int led = 4;
// relay_A
const int RELAY_A = A0;
// variables from sketch example
String inputString = ""; // a string to hold incoming data
boolean stringComplete = false; // whether the string is complete
void setup() {
Serial.begin(2400); // open serial port, sets data rate to 2400bps
Serial.println("Power on test");
inputString.reserve(200);
pinMode(RELAY_A, OUTPUT);
}
void open_valve() {
digitalWrite(RELAY_A, HIGH); // turn RELAY_A on
}
void close_valve() {
digitalWrite(RELAY_A, LOW); // turn RELAY_A off
}
void flow_A_blink() {
digitalWrite(led, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for one second
digitalWrite(led, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}
void flow_A_blink_stop() {
digitalWrite(led, LOW);
}
void loop() {
// print the string when newline arrives:
if (stringComplete) {
Serial.println(inputString);
// clear the string:
inputString = "";
stringComplete = false;
}
if (inputString == "{blink_Flow_A}") {
flow_A_blink();
}
}
//SerialEvent occurs whenever a new data comes in the
//hardware serial RX. This routine is run between each
//time loop() runs, so using delay inside loop can delay
//response. Multiple bytes of data may be available.
void serialEvent() {
while(Serial.available()) {
// get the new byte:
char inChar = (char)Serial.read();
// add it to the inputString:
inputString += inChar;
// if the incoming character is a newline, set a flag
// so the main loop can do something about it:
if (inChar == '\n') {
stringComplete = true;
}
}
}
如果这有什么不同的话，IRC 上的某个人告诉我研究状态机会挠头