智能恒温器开源分享

描述

只需发短信即可连接到这个智能恒温器，无需额外的仪表板或平台。

了解电报机器人

Telegram 提供了一组超级有用的 API  ，您可以在项目中使用。

您可以在 Arduino 板上托管一个机器人，并使用一个名为 Telegram Bot的简单库与它聊天。您可以通过 Arduino 桌面 IDE 中的库管理器安装此库，或者通过在Arduino Web 编辑器上导入 .Zip 文件来安装此库。

您可以在此处了解有关如何在 MKR1000 上管理 Telegram Bot 的所有 信息。在本教程 中，我们将跳过这一步，但您将看到如何在最终代码中实现 Telegram 机器人。

时间管理

这个恒温器允许你编程一整周并循环它。

为此，恒温器发出 UDP 调用并使用接收到的数据来设置实时时钟 (RTC)。

安装 RTCZero 和WiFi101库 并上传此草图以测试此功能。

#include 
#include 
#include 
#include 

RTCZero rtc;
WiFiUDP Udp; // A UDP instance to let us send and receive packets over UDP

// Initialize Wifi connection to the router
char ssid[] = "xxxx";             // your network SSID (name)
char pass[] = "yyyy";           // your network key

WiFiSSLClient client;
unsigned long epoch;
unsigned int localPort = 2390;      // local port to listen for UDP packets
IPAddress timeServer(129, 6, 15, 28); // time.nist.gov NTP server
const int NTP_PACKET_SIZE = 48; // NTP time stamp is in the first 48 bytes of the message
byte packetBuffer[ NTP_PACKET_SIZE]; //buffer to hold incoming and outgoing packets

void setup() {

  Serial.begin(115200);

  // attempt to connect to Wifi network:
  Serial.print("Connecting Wifi: ");
  Serial.println(ssid);
  while (WiFi.begin(ssid, pass) != WL_CONNECTED) {
    Serial.print(".");
    delay(500);
  }
  Serial.println("");
  Serial.println("WiFi connected");

  rtc.begin();
  GetCurrentTime();
}

void loop() {
  Serial.print("Unix time = ");
  Serial.println(rtc.getEpoch());

  // Print date...
  Serial.print(rtc.getDay());
  Serial.print("/");
  Serial.print(rtc.getMonth());
  Serial.print("/");
  Serial.print(rtc.getYear());
  Serial.print("\t");

  // ...and time
  print2digits(rtc.getHours());
  Serial.print(":");
  print2digits(rtc.getMinutes());
  Serial.print(":");
  print2digits(rtc.getSeconds());
  Serial.println();

  delay(1000);
}

void print2digits(int number) {
  if (number < 10) {
    Serial.print("0");
  }
  Serial.print(number);
}

void GetCurrentTime() {

  int numberOfTries = 0, maxTries = 6;
  do {
    epoch = readLinuxEpochUsingNTP();
    numberOfTries++;
  }
  while ((epoch == 0) || (numberOfTries > maxTries));

  if (numberOfTries > maxTries) {
    Serial.print("NTP unreachable!!");
    while (1);
  }
  else {
    Serial.print("Epoch received: ");
    Serial.println(epoch);
    rtc.setEpoch(epoch);
    Serial.println();
  }

}

unsigned long readLinuxEpochUsingNTP()
{
  Udp.begin(localPort);
  sendNTPpacket(timeServer); // send an NTP packet to a time server
  // wait to see if a reply is available
  delay(1000);

  if ( Udp.parsePacket() ) {
    Serial.println("NTP time received");
    // We've received a packet, read the data from it
    Udp.read(packetBuffer, NTP_PACKET_SIZE); // read the packet into the buffer
    //the timestamp starts at byte 40 of the received packet and is four bytes,
    // or two words, long. First, esxtract the two words:

    unsigned long highWord = word(packetBuffer[40], packetBuffer[41]);
    unsigned long lowWord = word(packetBuffer[42], packetBuffer[43]);
    // combine the four bytes (two words) into a long integer
    // this is NTP time (seconds since Jan 1 1900):
    unsigned long secsSince1900 = highWord << 16 | lowWord;
    // now convert NTP time into everyday time:
    // Unix time starts on Jan 1 1970. In seconds, that's 2208988800:
    const unsigned long seventyYears = 2208988800UL;
    // subtract seventy years:
    Udp.stop();
    return (secsSince1900 - seventyYears);
  }
  else {
    Udp.stop();
    return 0;
  }
}
// send an NTP request to the time server at the given address
unsigned long sendNTPpacket(IPAddress & address)
{
  // set all bytes in the buffer to 0
  memset(packetBuffer, 0, NTP_PACKET_SIZE);
  // Initialize values needed to form NTP request
  // (see URL above for details on the packets)

  packetBuffer[0] = 0b11100011;   // LI, Version, Mode
  packetBuffer[1] = 0;     // Stratum, or type of clock
  packetBuffer[2] = 6;     // Polling Interval
  packetBuffer[3] = 0xEC;  // Peer Clock Precision
  // 8 bytes of zero for Root Delay & Root Dispersion
  packetBuffer[12]  = 49;
  packetBuffer[13]  = 0x4E;
  packetBuffer[14]  = 49;
  packetBuffer[15]  = 52;

  // all NTP fields have been given values, now
  // you can send a packet requesting a timestamp:
  Udp.beginPacket(address, 123); //NTP requests are to port 123
  Udp.write(packetBuffer, NTP_PACKET_SIZE);
  Udp.endPacket();
}

保存设置

当然你不希望你的恒温器在每次关闭时都忘记它的设置:)

为避免此问题，您可以使用FlashStorage库将数据存储在电路板的闪存中。

在这种特殊情况下，我们使用此功能来存储 7 天 7*24 小时的结构，以及所需温度的值。

上传此示例以测试此功能。

/*
  Store and retrieve an integer value in Flash memory.
  The value is increased each time the board is restarted.
  This example code is in the public domain.
  Written 30 Apr 2015 by Cristian Maglie 
*/

#include 

// Reserve a portion of flash memory to store an "int" variable
// and call it "my_flash_store".
FlashStorage(my_flash_store, int);

// Note: the area of flash memory reserved for the variable is
// lost every time the sketch is uploaded on the board.

void setup() {
  SERIAL_PORT_MONITOR.begin(9600);

  int number;

  // Read the content of "my_flash_store" and assign it to "number"
  number = my_flash_store.read();

  // Print the current number on the serial monitor
  SERIAL_PORT_MONITOR.println(number);

  // Save into "my_flash_store" the number increased by 1 for the
  // next run of the sketch
  my_flash_store.write(number + 1);
}

void loop() {
  // Do nothing...
}

从传感器读取值

在这个项目中，我们使用可以检测湿度和温度的 DHT 传感器。这个传感器有自己的库，你可以 在这里下载。

由于草图实现了许多功能，我们将其组织在不同的选项卡中，以下这些代码片段指的是传感器。

在 Config 选项卡中，我们声明传感器的类：

//#define USE_fahrenheit true  // Uncomment this to use Fahrenheit insted of Celsius

class Sensor {
  public:
      Sensor(void);
      void begin();
      bool ReadSensors();
      float GetTemp();
      float GetHumidity();
  private:
      float t;
      float f;
      float h;
};
extern Sensor DHTSensor;

在另一个选项卡中，我们定义了传感器类：

#include "DHT.h"
#include "config.h"

DHT dht(DHTPIN, DHTTYPE);

Sensor::Sensor(void) {
}

bool  Sensor::ReadSensors() {
  h = dht.readHumidity();
  t = dht.readTemperature(); // Read temperature as Celsius (the default)
  f = dht.readTemperature(true);  // Read temperature as Fahrenheit (isFahrenheit = true)
  if (isnan(h) || isnan(t) || isnan(f)) {             // Check if any reads failed and exit early (to try again).
    Serial.println("Failed to read from DHT sensor!");
    return false;
  }

  return true;
}

void Sensor::begin() {
  dht.begin();
}

float  Sensor::GetTemp() {
#ifdef USE_fahrenheit
  return f;
#else
  return t;
#endif
}

float Sensor::GetHumidity() {
  return h;
}

硬件组件和库

现在您可以开始连接恒温器了。考虑到 LCD 显示器需要GFX和 ST7735库，而 DHT 传感器需要  DHT-sensor-library。