From 9db98ff9f26776e8f7af53d447d1a9e2981d8282 Mon Sep 17 00:00:00 2001
From: laifeilim <50793655@qq.com>
Date: Thu, 4 May 2017 21:50:43 +0800
Subject: [PATCH] Update 2.5.2-PIRAndLamp.ino
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注释了低电平继电器的开关问题，新手会被困扰很久（比如我）
---
 2.5.2-PIRAndLamp.ino | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/2.5.2-PIRAndLamp.ino b/2.5.2-PIRAndLamp.ino
index c664191..30d26a7 100644
--- a/2.5.2-PIRAndLamp.ino
+++ b/2.5.2-PIRAndLamp.ino
@@ -17,8 +17,8 @@ void loop() {
   while(!digitalRead(PIRpin)){}
   // 将灯打开10秒，然后关闭
   Serial.println("turn on");
-  digitalWrite(RELAYpin,HIGH);
+  digitalWrite(RELAYpin,HIGH);//继电器引脚输出高电平（打开），这个要看所使用的继电器是高电平触发还是低电平触发，如果是低电平触发的继电器需要把此处改为digitalWrite(RELAYpin,LOW)以导通继电器;
   delay(10000);  
-  digitalWrite(RELAYpin,LOW);
+  digitalWrite(RELAYpin,LOW);//同理,低电平触发的继电器此处应改为 digitalWrite(RELAYpin,HIGH);
   Serial.println("turn off");  
-}
\ No newline at end of file
+}