P1 poort slimme meter – MQTT Publisher (Arduino)
Bron: willem4ever @ Github
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#include <Time.h> #include <SPI.h> #include <EEPROM.h> #include <Dhcp.h> #include <Dns.h> #include <Ethernet.h> #include <EthernetClient.h> #include <EthernetServer.h> #include <EthernetUdp.h> #include <util.h> #include <PubSubClient.h> struct obis { byte a; byte b; byte c; byte d; byte e; byte f; }; byte mac[6] = { 0x90, 0xA2, 0xDA, 0x0d, 0x5c, 0x21 }; IPAddress ip(192,168,223,24); IPAddress gateway(192,168,223, 5); IPAddress subnet(255, 255, 255, 128); unsigned int localPort = 123; // local port to listen for UDP packets IPAddress dhcpNtp(192,168,223,9); // default, will take ip from dhcp server byte broker[] = { 192,168,223,7}; 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 // An EthernetUDP instance to let us send and receive packets over UDP EthernetUDP Ntp; PubSubClient client(broker, 1883, callback); unsigned long getNtpTime(); byte GetObis (char *p, struct obis *po); time_t pminute = 0; // once a minute time_t psecond = 0; const long timeZoneOffset = 0L; // set this to the offset in seconds to your local time; //const int pir = 7; //int pirstatus = 0; //int lightstatus = 0; char topic[64]; char Value[10][12]; char buffer[64]; char scratch[20]; byte bIndex; long datagrams; const char *message[] = { "powerusage1","powerusage2","powerdelivery1","powerdelivery2","powerrate","powerusagec","powerdeliveryc","gasusage"}; byte GetObis (char *p, struct obis *po) { // return index to delimeter hit byte i,a; po->a = po->b = po->c = po->d = po->e = po->f = 0xff; // clear obis struct i = a = 0; while (isdigit(p[i]) || p[i] == '-' || p[i] == ':' || p[i] == '.' || p[i] == '*') { // Escape on any non valid OBIS character if (isdigit(p[i])) { if (a) { a = a*10+p[i] - 0x30; } else a = p[i] - 0x30; } if (p[i] == '-') { po->a = a; a=0; } else if (p[i] == ':') { po->b = a; a=0; } else if (p[i] == '.' && po->c == 0xff) { po->c = a; a=0; } else if (p[i] == '.' && po->d == 0xff) { po->d = a; a=0; } else if (p[i] == '*' ) { po->e = a; a=0; } i++; } // We bumped into a non valid character, determine the last obis field (C & D are mandatory) if (po->d == 0xff) { // D po->d = a; } else if (po->e == 0xff) { // E po->e = a; } else if (po->f == 0xff) { // F po->f = a; } return i; } byte CompareObis (obis *po, byte a,byte b,byte c,byte d, byte e,byte f) { return (po->a == a && po->b == b && po->c == c && po->d == d && po->e == e && po->f == f); } // Extracts string from a single line and return index to the next value (when available) or '0' on EOL byte GetString (char *s,char *d) { byte i; i=0; while (s[i] != ')' && s[i] != 0) { if (s[i] != '(') { *d = s[i]; d++; } *d=0; i++; // Advance to next } // return ( s[i] == ')' && s[i+1] == '(' ? i+1 : 0 ); // 0 or index to next value } // Extracts float from a single line and return index to the next value (when available) or '0' on EOL byte GetFloat (char *s,char *d) { byte i; i=0; while (s[i] != ')' && s[i] != 0) { if (s[i] != '(') { if (s[i] == '*') *d=0; // Terminate on unit, but keep for reference else *d = s[i]; d++; } *d=0; i++; // Advance to next } // return ( s[i] == ')' && s[i+1] == '(' ? i+1 : 0 ); // 0 or index to next value } void callback(char* topic, byte* payload,unsigned int length) { ;// handle message arrived } void publish(char *xtopic,char *payload) { if(xtopic[0] == '/') sprintf (topic,"%s/%x%x%x",xtopic,mac[3],mac[4],mac[5]); else sprintf (topic,"/sensor/%x%x%x/%s",mac[3],mac[4],mac[5],xtopic); client.publish(topic, payload); } void setup() { int i; pinMode(2,INPUT); pinMode(A2,OUTPUT); digitalWrite(A2,1); Serial.begin(9600); UCSR0C = (UCSR0C & B11000001 ) | B00000100 | B00100000; // 7 bit even parity //for (i=0;i<5;i++) // EEPROM.write(i, mac[i]); for (i=0;i<5;i++) mac[i]=EEPROM.read(i); Serial.println(dhcpNtp); // start Ethernet and UDP if (Ethernet.begin(mac) == 0) { Serial.println("Failed to configure Ethernet using DHCP"); Ethernet.begin(mac,ip,subnet); } if (Ethernet.ntpServerIP()) { dhcpNtp = Ethernet.ntpServerIP(); } Serial.println(dhcpNtp); // Serial.print("My IP address: "); ip = Ethernet.localIP(); Ntp.begin(localPort); setSyncProvider(getNtpTime); while(timeStatus()== timeNotSet) ; // wait until the time is set by the sync provider // create unique client name based on mac address sprintf(buffer,"smarty%x%x%x",mac[3],mac[4],mac[5]); i = client.connect(buffer); ltoa (now(),scratch,10); publish("hello",scratch); bIndex = 0; datagrams = 0; } void loop() { unsigned long t = now(); int a; struct obis po; digitalWrite(A2,!digitalRead(2)); // Check for serial input if (Serial.available() > 0) { // read the incoming byte: a = Serial.read(); if (a != 0x020 || a != '\r') buffer[bIndex] = a; if (a == '\n') { buffer[bIndex]=0; if (buffer[0] == '/') { // MeterID ; } else if (buffer[0] == '!') { // End of Message // Publish our findings //long x = micros(); int i = 0; for (i=0;i<8;i++) { publish((char*)message[i],Value[i]); } datagrams++; //x = micros() - x; //sprintf(buffer,"%ld us",x); //publish("Timer/Elapsed",buffer); } else if (bIndex > 2) { //ignore empty lines int i = GetObis(buffer, &po); // 1-0:1.8.1(00180.726*kWh) powerusage1 if (CompareObis(&po,1,0,1,8,1,255)) { i = GetFloat(&buffer[i],Value[0]); //publish("Powerusage1",Value); } //1-0:1.8.2(00001.416*kWh) powerusage2 else if (CompareObis(&po,1,0,1,8,2,255)) { i = GetFloat(&buffer[i],Value[1]); //publish("Powerusage2",Value); } // 1-0:2.8.1(00000.000*kWh) else if (CompareObis(&po,1,0,2,8,1,255)) { i = GetFloat(&buffer[i],Value[2]); //publish("Powerdelivery1",Value); } // 1-0:2.8.2(00000.000*kWh) else if (CompareObis(&po,1,0,2,8,2,255)) { i = GetFloat(&buffer[i],Value[3]); //publish("Powerdelivery2",Value); } // 0-0:96.14.0(0001) else if (CompareObis(&po,0,0,96,14,0,255)) { i = GetString(&buffer[i],Value[4]); //publish("PowerTariff",Value); } // 1-0:1.7.0(0000.42*kW) else if (CompareObis(&po,1,0,1,7,0,255)) { i = GetFloat(&buffer[i],Value[5]); //publish("Powerusage",Value); } // 1-0:2.7.0(0000.00*kW) else if (CompareObis(&po,1,0,2,7,0,255)) { i = GetFloat(&buffer[i],Value[6]); //publish("Powerdelivery",Value); } // Invalid Obis returns with po.d = 0 ... else if (CompareObis(&po,255,255,255,0,255,255)) { i = GetFloat(&buffer[i],Value[7]); //publish("Gasusage",Value); } } bIndex=0; } else { if (bIndex < 64) bIndex++; } } if( t % 60 == 0 && t != pminute) { //update the display only if the time has changed pminute = t; psecond = t; ltoa (t,scratch,10); publish("timestamp", scratch); ltoa (datagrams,scratch,10); publish("datagrams", scratch); Ethernet.maintain(); } client.loop(); } unsigned long getNtpTime () { int iBytes; sendNTPpacket(dhcpNtp); // send an NTP packet to a time server // Serial.println("#1"); // wait for a reply / timeout after 10 seconds iBytes = 0; while (Ntp.parsePacket() != 48 && iBytes < 2000) { iBytes++; delay(5); } // Serial.println("#2"); if (Ntp.available() == 48) { Serial.print("time synched in "); Serial.print(iBytes*5); Serial.println(" milliseconds"); // Ntp.read(packetBuffer,8); // dump header Ntp.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; const unsigned long seventyYears = 2208988800UL - timeZoneOffset; unsigned long epoch = secsSince1900 - seventyYears; return epoch; } else { //Serial.print (Ntp.available()); //Serial.println(" - No NTP packet received"); return 0; } } // send an NTP request to the time server at the given address void sendNTPpacket(IPAddress ntpServer) { // 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: Ntp.beginPacket(ntpServer, 123); Ntp.write( packetBuffer,NTP_PACKET_SIZE); Ntp.endPacket(); } |