主意

• 有机会使用其他KM继电器触点进行反馈；
• 我们将提高用电安全性，这在潮湿房间中尤其重要；
• 我们将能够切换比为KMTronic继电器设计的负载更强大的负载。

实作

KMTronic UDP中继连接到Raspberry Pi上的Domoticz

• 设置socat以使用UDP：
  
  

  sudo apt-get install socat
  

  
  
• 在〜/ domoticz / scripts目录中，创建一个脚本以通过UDP控制KMTronic。调用脚本，例如rudp.sh：
  
  

  #!/bin/bash
  RelayIP="$1"
  RelayNumber="$2"
  Status=$(echo FF0000 | socat - udp-datagram:192.168.100.${RelayIP}:12345)
  StatusBit=${Status:RelayNumber-1:1}
  CommandON=FF0${RelayNumber}01
  CommandOFF=FF0${RelayNumber}00
  if [ "$StatusBit" = "1" ]; then
  echo ${CommandOFF} | socat - udp-datagram:192.168.100.${RelayIP}:12345
  else
  echo ${CommandON} | socat - udp-datagram:192.168.100.${RelayIP}:12345
  fi
  

  
  
• 我们使rudp.sh文件可执行：
  
  

  chmod +x rudp.sh
  

  
  
• 从命令行检查：
  
  

  rudp.sh 199 1
  

  
  
  此命令应使用默认端口12345切换地址为192.168.100.199的KMTronic设备的继电器＃1。
  
  
• 在Domoticz中，创建一个虚拟开关，在“打开动作”和“关闭动作”字段中指定：
  
  

  script:///home/pi/domoticz/scripts/rudp.sh 199 1
  

  
  
  现在，当您单击开关时，“ UDP中继”触点就会开关。
  同时，我们可以使用手动开关来切换负载。
  
  

使用Arduino协议MQTT收集有关负载状态的信息

• 我们填写了在Arduino中使用MQTT的草图（注意，在草图中，您需要通过填写domoticz_Idx []数组来连接Arduino输入和虚拟开关的Idx索引）。
  
  草绘

  #include <SPI.h>
  #include <Ethernet.h>
  #include <Bounce2.h>
  #include <PubSubClient.h>
  
  byte mac[]    = {  0xDE, 0xED, 0xBA, 0xFE, 0xFE, 0xED };
  byte server[] = { 192, 168, 100, 250};
  byte ip[]     = { 192, 168, 100, 199};
  
  // I/O ports on board, 20 for UNO and Leonardo (14 DI + 6 AI) 
  static const int ioPorts = 20; 
  
  // all pins                           0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19
  static const uint8_t arduinoPins[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,A0,A1,A2,A3,A4,A5};
  static const int availablePin[]    = {1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1}; //  pins available for general I/O. 1 - available, 0 - not available
  static const int domoticz_Idx[]    = {5, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; //
  
  // Buffers for sending data
  char  statusBuffer[ioPorts+1] = "0";           
  char  prevStatusBuffer[ioPorts+1] = "0"; 
  
  // Instantiate a Bounce object
  Bounce debouncer[ioPorts] = Bounce();
  
  // Function headers
  void callback(char* topic, byte* payload, unsigned int length);
  char pinToChar(int value);
  int compareCharArrays(char  array1[ioPorts+1], char array2[ioPorts+1]);
  void readAllPins();
  void publishPins(boolean all);
  void setup();
  void loop();
  
  EthernetClient ethClient;
  PubSubClient clientMQTT(server, 1883, callback, ethClient);
  
  void callback(char* topic, byte* payload, unsigned int length) {
    byte* p = (byte*)malloc(length);
    memcpy(p,payload,length);
    publishPins(true); 
    free(p);
  }
  
  char pinToChar(int value) {
    char result = 'X';
    if (value==HIGH) {
      result = '0';  // if pin opened, send 0
    }  
    if (value==LOW) {
       result = '1';  // if pin closed to GND, send 1
    }   
    return result; 
  }
  
  int compareCharArrays(char  array1[ioPorts+1], char array2[ioPorts+1]) {
    int result = 0;
    for (int i =0; i <= (ioPorts); i++) {
      if (array1[i]!=array2[i]) {
        result = 1;
        break;
      }  
    }  
    return result;    
  }
  
  void readAllPins() {
    for (int i =0; i < (ioPorts); i++)
    {
      if (availablePin[i]) 
      {
        debouncer[i].update();
        statusBuffer[i] =  pinToChar(debouncer[i].read());
      }  
    }  
  }
  
  void publishPins(boolean all) {
    char topic[]="domoticz/in";
    String data;
    char jsonStr[200];
    for (int i =0; i < (ioPorts); i++)
    {
      if ((all) || (prevStatusBuffer[i]!=statusBuffer[i]))
      {
        if ((availablePin[i]) && (domoticz_Idx[i])) 
        {
          data="{\"idx\":";
          data+=(int)domoticz_Idx[i];
          data+=",\"nvalue\":";
          data+=(char)statusBuffer[i];
          data+="}";
          data.toCharArray(jsonStr,200);
          clientMQTT.publish(topic,jsonStr); 
          Serial.print(topic);
          Serial.print(" ");
          Serial.println(jsonStr);
        }
      }  
    }  
  }
  
  void setup() {  
    // initialize serial port over USB  
    Serial.begin(9600);
    
    Ethernet.begin(mac, ip);
    
    // initialize the digital pins as an input.
    for (int i =0; i < ioPorts; i++)
    {
      if (availablePin[i]) { 
        pinMode(i, INPUT_PULLUP);
        debouncer[i].attach(arduinoPins[i]);       // setup the Bounce instance
        debouncer[i].interval(100);   // interval in ms
      }  
      statusBuffer[i]='0';  
      prevStatusBuffer[i]='0'; 
    }
    statusBuffer[ioPorts]='\0';      // EOL
    prevStatusBuffer[ioPorts]='\0';  // EOL
  
    readAllPins();
    
    if (clientMQTT.connect("myhome-ino-id1")) {
      clientMQTT.subscribe("myhome/ino/id1/in/#");
      publishPins(true);
    }
  }
  
  void loop(){
    clientMQTT.loop();
    readAllPins();
    if (compareCharArrays(statusBuffer,prevStatusBuffer)==1)
    // time for send information to the server
    {
        if (!clientMQTT.connected()){
          if (clientMQTT.connect("myhome-ino-id1")) {
            clientMQTT.subscribe("myhome/ino/id1/in/#");
          }  
        } 
        
        if (clientMQTT.connected()) { 
          publishPins(false);
        }  
      
      for (int i =0; i < (ioPorts); i++) {
        prevStatusBuffer[i]=statusBuffer[i]; 
      }
    }    
  }
  

  
  
  
  
• 我们将中间继电器的自由触点连接到Arduino的触点Gnd和DIxx。
  
  
• 要通过Domoticz中的MQTT接收信息，请安装MQTTWorker。
  
  
• 手动打开和关闭负载，并在Domoticz界面中观察负载状态的变化。