物联网起步----esp8266本地点灯

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物联网起步----esp8266本地点灯

准备
- 硬件准备
- 通讯准备
程序上手
- GPIO点选择
- 完整代码
上传代码
最后的效果

准备

物联网编程，不像我们纯粹的软件编程，还需要硬件的支持。

硬件准备

需要esp8266板子一个，杜邦线若干条。（这是必须的）
我这里有一个三色LED （ KY-016 3色 LED），就拿它来试试手。

ky-016 三色LED

通讯准备

esp8266用数据线直连电脑是COM通讯的，直接连接电脑usb后，板子电源灯常亮，（如果不亮就要看看板子说明书了），这时候

设备管理器端口查看
记住 端口号 ！！！

打开Arduino进行端口设置：

端口设置

程序上手

GPIO点选择

选择的三色灯，需要三正一负。就随便选D2（GPIO4）、D3（GPIO0）、D4（GPIO2)、GND；

在这里插入图片描述

完整代码

/*ESP8266 Blink by Simon PeterBlink the blue LED on the ESP-01 moduleThis example code is in the public domainThe blue LED on the ESP-01 module is connected to GPIO1 (which is also the TXD pin; so we cannot use Serial.print() at the same time)Note that this sketch uses BUILTIN_LED to find the pin with the internal LED
*/
int LED_PIN2 = 2;//GPIO2
int LED_PIN3 = 0;//GPIO0
int LED_PIN4 = 4;//GPIO4
void setup() 
{Serial.begin(115200);pinMode(LED_PIN2, OUTPUT);     // Initialize the BUILTIN_LED pin as an outputpinMode(LED_PIN3, OUTPUT);pinMode(LED_PIN4, OUTPUT);
}// the loop function runs over and over again forever
void loop() 
{int i=0;for(i;i<8;i++){switch(i){case 0:digitalWrite(LED_PIN2, 0);   // Turn the LED on (Note that LOW is the voltage leveldigitalWrite(LED_PIN3, 0);digitalWrite(LED_PIN4, 0);break;case 1:digitalWrite(LED_PIN2, 0);   // Turn the LED on (Note that LOW is the voltage leveldigitalWrite(LED_PIN3, 0);digitalWrite(LED_PIN4, 1);break;case 2:digitalWrite(LED_PIN2, 0);   // Turn the LED on (Note that LOW is the voltage leveldigitalWrite(LED_PIN3, 1);digitalWrite(LED_PIN4, 0);break;case 3:digitalWrite(LED_PIN2, 0);   // Turn the LED on (Note that LOW is the voltage leveldigitalWrite(LED_PIN3, 1);digitalWrite(LED_PIN4, 1);break;case 4:digitalWrite(LED_PIN2, 1);   // Turn the LED on (Note that LOW is the voltage leveldigitalWrite(LED_PIN3, 0);digitalWrite(LED_PIN4, 0);break;case 5:digitalWrite(LED_PIN2, 1);   // Turn the LED on (Note that LOW is the voltage leveldigitalWrite(LED_PIN3, 0);digitalWrite(LED_PIN4, 1);break;case 6:digitalWrite(LED_PIN2, 1);   // Turn the LED on (Note that LOW is the voltage leveldigitalWrite(LED_PIN3, 1);digitalWrite(LED_PIN4, 0);break;case 7:digitalWrite(LED_PIN2, 1);   // Turn the LED on (Note that LOW is the voltage leveldigitalWrite(LED_PIN3, 1);digitalWrite(LED_PIN4, 1);break;}delay(1000);      //间隔1000ms也就是1秒}
}