esp8266打造女友小礼物
异地恋+女友考研ing，想给女友一个随时随地都能想起我的小礼物。女友喜欢花花，也喜欢折花，于是有了灵感基础，想打造两盆互通的花花，每次起风都代表我的思念。
思路为搭建一个BS架构，用一个web应用控制两边的交互，一边花花的震动模块接受到震动感应，随即携带open参数请求url，另一边的花花则每秒请求一次url，如果为open，则打开风扇，这样就实现了两边的花花能同时吹动。
材料
单盆花花材料如下：
- esp8266—12块钱
- 塑料万象盆—3块钱（可惜基本不单卖）
- 震动模块—2块钱
- 风扇模块—6块钱
- 铜丝+花匀下来—6块钱
一盆的造价大概30块钱左右（自行算上microusb线，杜邦线和手工工具咯），价格还算美丽，不过最重要的还是让她感受到自己亲手做的情意咯。
编程
服务端
几行php代码即可，web应用接受get参数来获取花花的状态，并用一个文件存储现在的状态，当有花花请求现在的状态时则把文件中的状态打印出来，这样两盆花花就能同步状态了。
<?php
$status = $_GET['status'];
$filename = "flower.conf";
if($status=="open"){
$conf = fopen($filename,"w+");
fwrite($conf,"open");
fclose($conf);
}
elseif($status=="close"){
$conf = fopen($filename,"w+");
fwrite($conf,"close");
fclose($conf);
}
elseif($status=="query") {
$conf = fopen($filename,"r");
$content = fread($conf, filesize($filename));
echo($content);
}
?>
esp8266
使用WiFiManager库完成esp8266的自动配网，非常方便使用。连上网后考虑交互流程，为了避免风扇转动引起震动导致两边风扇永续转动，先将感应震动与控制风扇分开
感应震动过程为：一盆花花接受到震动，发送open给服务端，过3秒更新状态为close并发送给服务端
控制风扇过程为：未感应到震动，则请求服务端。若为open则打开风扇，并在3秒后关闭风扇发送close给服务端；若为close则进入下一次循环。
这样完成了整个过程，代码如下：
#include <Ticker.h>
#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <DNSServer.h>
#include <ESP8266WebServer.h>
#include <WiFiManager.h>
#include <WiFiClient.h>
#include <Arduino.h>
#define OPEN_URL "http://xxx.xxx.xxx.xxx/flower.php?status=open"
#define CLOSE_URL "http://xxx.xxx.xxx.xxx/flower.php?status=close"
#define QUERY_URL "http://xxx.xxx.xxx.xxx/flower.php?status=query"
Ticker ticker;
int count;
void setup() {
Serial.begin(115200);
Serial.println("/*****开始驱动*****/");
WiFiManager wifiManager;
wifiManager.autoConnect("Gardenia jasminoides");
Serial.println("");
Serial.print("ESP8266 Connected to ");
Serial.println(WiFi.SSID());
Serial.print("IP address:\t");
Serial.println(WiFi.localIP());
pinMode(D1,OUTPUT);
ticker.attach(1, tickerCount);
}
void loop() {
if (digitalRead(D2))
{//未震动
if (count >=1)
{
count=0;
String fan_mode = QueryRequest();
if (fan_mode == "close")
{//风扇未启动
digitalWrite(D1, LOW);
}
else if (fan_mode == "open")
{
Serial.println("start fan");
digitalWrite(D1, HIGH);//启动风扇
//analogWrite(D1, 1000);
delay(2500);
CloseRequest();
delay(1000);
}
}
}
else
{
Serial.println("detect shock，sending open request");//震动
OpenRequest();
delay(3000);
CloseRequest();
}
}
void tickerCount(){
count++;
}
String OpenRequest(){
HTTPClient httpClient;
WiFiClient client;
httpClient.begin(client,OPEN_URL);
int httpCode = httpClient.GET();
Serial.print("Send GET request to URL: ");
Serial.println(OPEN_URL);
if (httpCode == HTTP_CODE_OK) {
String responsePayload = httpClient.getString();
Serial.println("Server Response Payload: ");
Serial.println(responsePayload);
httpClient.end();
return responsePayload;
} else {
Serial.printf("[HTTP] Requests failed, error: %s\n", httpClient.errorToString(httpCode).c_str());
httpClient.end();
return "failed";
}
}
String CloseRequest(){
HTTPClient httpClient;
WiFiClient client;
httpClient.begin(client,CLOSE_URL);
int httpCode = httpClient.GET();
Serial.print("Send GET request to URL: ");
Serial.println(CLOSE_URL);
if (httpCode == HTTP_CODE_OK) {
String responsePayload = httpClient.getString();
Serial.println("Server Response Payload: ");
Serial.println(responsePayload);
httpClient.end();
return responsePayload;
} else {
Serial.printf("[HTTP] Requests failed, error: %s\n", httpClient.errorToString(httpCode).c_str());
httpClient.end();
return "failed";
}
}
String QueryRequest(){
HTTPClient httpClient;
WiFiClient client;
httpClient.begin(client,QUERY_URL);
int httpCode = httpClient.GET();
Serial.print("Send GET request to URL: ");
Serial.println(QUERY_URL);
if (httpCode == HTTP_CODE_OK) {
String responsePayload = httpClient.getString();
Serial.println("Server Response Payload: ");
Serial.println(responsePayload);
httpClient.end();
return responsePayload;
} else {
Serial.printf("[HTTP] Requests failed, error: %s\n", httpClient.errorToString(httpCode).c_str());
httpClient.end();
return "failed";
}
}
组装
按照上述代码的话esp8266的d1用于控制风扇，d2用于震动，再各自分别连好vcc和gnd，将花用细铜丝+粘胶固定在震动模块的顶端（铜丝最好细一点0.2mm-0.3mm，花也最好折小一点，风扇模块的风力并没有那么大），然后组装到一起，就可以了
组装完如图：
最后放进万象盆里，塑料盆底部开口将线迁出，就完成了。
