描述

只需發(fā)短信即可連接到這個智能恒溫器，無需額外的儀表板或平臺。

了解電報機器人

Telegram 提供了一組超級有用的 API ?，您可以在項目中使用。

您可以在 Arduino 板上托管一個機器人，并使用一個名為?Telegram Bot的簡單庫與它聊天。您可以通過 Arduino 桌面 IDE 中的庫管理器安裝此庫，或者通過在Arduino Web 編輯器上導(dǎo)入 .Zip 文件來安裝此庫。

您可以在此處了解有關(guān)如何在 MKR1000 上管理 Telegram Bot 的所有?信息。在本教程?中，我們將跳過這一步，但您將看到如何在最終代碼中實現(xiàn) Telegram 機器人。

時間管理

這個恒溫器允許你編程一整周并循環(huán)它。

為此，恒溫器發(fā)出 UDP 調(diào)用并使用接收到的數(shù)據(jù)來設(shè)置實時時鐘 (RTC)。

安裝?RTCZero?和WiFi101庫?并上傳此草圖以測試此功能。

#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();
}

保存設(shè)置

當然你不希望你的恒溫器在每次關(guān)閉時都忘記它的設(shè)置:)

為避免此問題，您可以使用FlashStorage庫將數(shù)據(jù)存儲在電路板的閃存中。

在這種特殊情況下，我們使用此功能來存儲 7 天 7*24 小時的結(jié)構(gòu)，以及所需溫度的值。

上傳此示例以測試此功能。

/*
  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...
}

從傳感器讀取值

在這個項目中，我們使用可以檢測濕度和溫度的 DHT 傳感器。這個傳感器有自己的庫，你可以?在這里下載。

由于草圖實現(xiàn)了許多功能，我們將其組織在不同的選項卡中，以下這些代碼片段指的是傳感器。

在 Config 選項卡中，我們聲明傳感器的類：

//#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;

?

在另一個選項卡中，我們定義了傳感器類：

#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;
}

硬件組件和庫

現(xiàn)在您可以開始連接恒溫器了。考慮到 LCD 顯示器需要GFX和?ST7735庫，而 DHT 傳感器需要 ?DHT-sensor-library。?