c++ - 为什么我的代码从来没有得到命令重启？

Question

它一直在失败、失败、失败。

Arduino YUN 我有这个代码。它必须转到一个站点并获取值“rebo​​ot”，如果值“rebo​​ot”找到它执行操作，如果“rebo​​ot”不执行则什么都不做。

有时候reboot命令可以用，但不是一直用，这让我很难过。

有谁知道为什么我的代码不起作用？

#include <Bridge.h>
#include <HttpClient.h>

String result = String("");
void setup() {
  delay(5000);
  pinMode(2, OUTPUT);
  Bridge.begin();
  digitalWrite(2, HIGH);
}

void loop() {
  HttpClient client;

  // PIN 2
  client.get("http://www.example.com/output.php?value=reboot");// output.php outputs the value reboot and the reset the value to empty string. after 10 second php puts the value to reboot and then put the value to empty. 
  result = "";
  while (client.available()) {
    char c = client.read();
    result = result + c;
  }

  if(result.indexOf("reboot") >= 0) {// this keeps failing, sometime working and sometime not working
    digitalWrite(2, LOW);
    delay(3000);
    digitalWrite(2, HIGH);
  }

  delay(7000);
}

Answer 1

有效。

#include <Bridge.h>
#include <HttpClient.h>
String result = String("");
void setup() {
  delay(5000);
  pinMode(2, OUTPUT);
  Bridge.begin();
  digitalWrite(2, HIGH);

}
boolean was_on = false;
void loop() {
  HttpClient client;

  // PIN 2
  client.get("http://ok.example.com/ajax/light");
  delay(500);
  result = "";
  while (client.available()) {
    char c = client.read();
    result = result + c;
  }


  if(result.indexOf("reboot") >= 0) {
    digitalWrite(2, LOW);
    delay(2000);
    was_on = true;
  } else {
    if(was_on) {
      digitalWrite(2, HIGH);
      delay(1000);
      was_on = false;
    }
  }

  delay(3000);
}