D1 MINI 制作可测温、土壤湿度的智能浇水器

D1 MINI + 2路继电器 制作可测温、土壤湿度的智能浇水器，可设置浇水的土壤湿度阈值、浇水的时间周期，当检测到土壤湿度低于阈值时自动浇水。

成品：

需要的材料：

D1MIINI芯片、2路 继电器、DS18B20测温度、220V-5V稳压、还有土壤湿度传感器

自己用洞洞板焊接了一下，技术很捉急，惨不忍睹，背面就不展示了。

组装起来就可以了：

设计了一下点灯的APP界面：

界面可以获取DS18B20测量的室温，土壤湿度，WIFI信号强度以及两个开关：浇水泵和循环水泵。浇水启动一次持续10s，循环水泵是用来沼泽过滤的，冬天沼泽过滤撤掉了。

最后贴一下代码：

#define BLINKER_WIFI
#include <Blinker.h>
#include <OneWire.h>
#include <DallasTemperature.h>

#define ONE_WIRE_BUS 2 // DS18B20 on NodeMCU pin D4
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature DS18B20(&oneWire);

char auth[] = "";
char ssid[] = "";
char pswd[] = "";

// 新建组件对象
BlinkerButton Button1("btn-w");
BlinkerButton Button2("btn-s");

BlinkerNumber TEMP("temp");
BlinkerNumber JSCOUNT("jscount");
BlinkerNumber SYSRSSI("rssi");
BlinkerNumber SOILVALUE("soil");
BlinkerText SYSTIME("systime");
BlinkerSlider SliderWP("wp");
BlinkerSlider SliderWY("wy");

//定义土壤湿度
#define soilPin A0

//Relay
#define RELAY1 D5
#define RELAY2 D6

float temp_read = 0;


//浇水计数器
int TOTALCOUNT=0;

//浇水阈值(土壤湿度低于该值浇水)
int WY = 20;

//浇水周期（单位小时）
int WP = 4;

void sliderWYcallback(int32_t value)
{
    BLINKER_LOG("get slider value: ", value);
    WY = value;
}

void sliderWPcallback(int32_t value)
{
    BLINKER_LOG("get slider value: ", value);
    WP = value;
}

void heartbeat()
{
    TEMP.print(temp_read);
    String tstr = getTime();
    int tmpsoil = getSoilValue();
    SYSRSSI.print(WiFi.RSSI());
    SYSTIME.print(tstr);
    SOILVALUE.print(tmpsoil);
    JSCOUNT.print(TOTALCOUNT);
    SliderWP.print(WP);
    SliderWY.print(WY);
    if (digitalRead(RELAY2) == HIGH)
    {
        Button2.color("#708090");
        Button2.print("off");
    }
    else if(digitalRead(RELAY2) == LOW)
    {
        Button2.color("#6666ff");
        Button2.print("on");
    }
}

// 按下按键即会执行该函数
void button1_callback(const String & state)
{
    BLINKER_LOG("get button state: ", state);
    digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN));
    startRainOneTime();
}
void button2_callback(const String & state)
{
    BLINKER_LOG("get button state: ", state);
    if (state == BLINKER_CMD_ON) {
        digitalWrite(RELAY2, LOW);
        Button2.color("#6666ff");
        Button2.print("on");
    }
    else if (state == BLINKER_CMD_OFF) {
        digitalWrite(RELAY2, HIGH);
        Button2.color("#708090");
        Button2.print("off");
    }
}

String getTime()
{
    uint32_t time=millis();
    int day=time / 86400000;
    int hour=(time-(86400000*day)) / 3600000;
    int min=(time-(86400000*day)-(3600000*hour)) / 60000;
    String timeStr=String(day)+"天"+String(hour)+"时"+String(min)+"分";

    if (hour > 0 and hour % WP == 0 and getSoilValue() < WY)
    {
        Blinker.print(timeStr);
        Blinker.print("自动浇水一次！");

        startRainOneTime();
    }

    return timeStr;
}

int getSoilValue()
{
    int soilValue;
    int soilMoisture;
    //读取土壤传感器上的电压值
    soilValue = analogRead(soilPin);
    //把电压值按照[0,1023]映射到[100,0]
    soilMoisture = map(soilValue,0,1023,100,0);
    return soilMoisture;
}

void startRainOneTime()
{
    //继电器开10s 用于浇水
    digitalWrite(RELAY1, !digitalRead(RELAY1));
    Blinker.delay(10000);
    digitalWrite(RELAY1, !digitalRead(RELAY1));
    TOTALCOUNT++;
}

void setup()
{
    // 初始化串口
    Serial.begin(115200);
    BLINKER_DEBUG.stream(Serial);
    BLINKER_DEBUG.debugAll();

    // 初始化有LED的IO
    pinMode(LED_BUILTIN, OUTPUT);
    digitalWrite(LED_BUILTIN, HIGH);

    //Relay
    pinMode(RELAY1, OUTPUT);
    digitalWrite(RELAY1, HIGH);

    pinMode(RELAY2, OUTPUT);
    digitalWrite(RELAY2, LOW);

    // 初始化blinker
    Blinker.begin(auth, ssid, pswd);

    Button1.attach(button1_callback);
    Button2.attach(button2_callback);
    SliderWP.attach(sliderWPcallback);
    SliderWY.attach(sliderWYcallback);

    Blinker.attachHeartbeat(heartbeat);
    DS18B20.begin();
}

void loop() {
    Blinker.run();

    DS18B20.requestTemperatures(); 
    temp_read = DS18B20.getTempCByIndex(0);
    Serial.print(temp_read);
    BLINKER_LOG("temp: ", temp_read);
    Blinker.delay(2000);

}