P1 poort slimme meter - Data naar Domoticz (ESP8266)

Software for the ESP2866 that sends P1 smart meter data to Domoticz (with CRC checking and OTA firmware updates)

Installation instrucions

Make sure that your ESP8266 can be flashed from the Arduino environnment
Install the ESP8266 SoftSerial library
Place all files from this repository in a directory. Open the .ino file.
Adjust WIFI, Domoticz and debug settings at the top of the file
Compile and flash

Connection of the P1 meter to the ESP8266

You need to connect the smart meter with a RJ11 connector. This is the pinout to use

#include <TimeLib.h>
#include <SoftwareSerial.h>
#include <ESP8266WiFi.h>
#include <ESP8266mDNS.h>
#include <ESP8266HTTPClient.h>
#include <WiFiUdp.h>
#include <ArduinoOTA.h>
#include "CRC16.h"

//===Change values from here===
const char* ssid = "WIFISSID";
const char* password = "PASSWORD";
const char* hostName = "ESPP1Meter";
const char* domoticzIP = "192.168.1.35";
const int domoticzPort = 8090;
const int domoticzGasIdx = 291;
const int domoticzEneryIdx = 294;
const bool outputOnSerial = true;
//===Change values to here===

// Vars to store meter readings
long mEVLT = 0; //Meter reading Electrics - consumption low tariff
long mEVHT = 0; //Meter reading Electrics - consumption high tariff
long mEOLT = 0; //Meter reading Electrics - return low tariff
long mEOHT = 0; //Meter reading Electrics - return high tariff
long mEAV = 0;  //Meter reading Electrics - Actual consumption
long mEAT = 0;  //Meter reading Electrics - Actual return
long mGAS = 0;    //Meter reading Gas
long prevGAS = 0;


#define MAXLINELENGTH 64 // longest normal line is 47 char (+3 for \r\n\0)
char telegram[MAXLINELENGTH];

#define SERIAL_RX     D5  // pin for SoftwareSerial RX
SoftwareSerial mySerial(SERIAL_RX, -1, true, MAXLINELENGTH); // (RX, TX. inverted, buffer)

unsigned int currentCRC=0;

void SendToDomoLog(char* message)
{
  char url[512];
  sprintf(url, "http://%s:%d/json.htm?type=command&param=addlogmessage&message=%s", domoticzIP, domoticzPort, message); 
}

void setup() {
  Serial.begin(115200);
  Serial.println("Booting");
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);

  while (WiFi.waitForConnectResult() != WL_CONNECTED) {
    Serial.println("Connection Failed! Rebooting...");
    delay(5000);
    ESP.restart();
  }
  mySerial.begin(115200);

  // Port defaults to 8266
  // ArduinoOTA.setPort(8266);

  // Hostname defaults to esp8266-[ChipID]
  ArduinoOTA.setHostname(hostName);

  // No authentication by default
  // ArduinoOTA.setPassword((const char *)"123");

  ArduinoOTA.onStart([]() {
    Serial.println("Start");
  });
  ArduinoOTA.onEnd([]() {
    Serial.println("\nEnd");
  });
  ArduinoOTA.onProgress([](unsigned int progress, unsigned int total) {
    Serial.printf("Progress: %u%%\r", (progress / (total / 100)));
  });
  ArduinoOTA.onError([](ota_error_t error) {
    Serial.printf("Error[%u]: ", error);
    if (error == OTA_AUTH_ERROR) Serial.println("Auth Failed");
    else if (error == OTA_BEGIN_ERROR) Serial.println("Begin Failed");
    else if (error == OTA_CONNECT_ERROR) Serial.println("Connect Failed");
    else if (error == OTA_RECEIVE_ERROR) Serial.println("Receive Failed");
    else if (error == OTA_END_ERROR) Serial.println("End Failed");
  });
  ArduinoOTA.begin();
  Serial.println("Ready");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
}


bool SendToDomo(int idx, int nValue, char* sValue)
{
  HTTPClient http;
  bool retVal = false;
  char url[255];
  sprintf(url, "http://%s:%d/json.htm?type=command&param=udevice&idx=%d&nvalue=%d&svalue=%s", domoticzIP, domoticzPort, idx, nValue, sValue);
  Serial.printf("[HTTP] GET... URL: %s\n",url);
  http.begin(url); //HTTP
  int httpCode = http.GET();
  // httpCode will be negative on error
  if (httpCode > 0)
  { // HTTP header has been send and Server response header has been handled
    Serial.printf("[HTTP] GET... code: %d\n", httpCode);

    // file found at server
    if (httpCode == HTTP_CODE_OK) {
      String payload = http.getString();
      retVal = true;
    }
  }
  else
  {
    Serial.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
  }
  http.end();
  return retVal;
}



void UpdateGas()
{
  //sends over the gas setting to domoticz
  if(prevGAS!=mGAS)
  {
    char sValue[10];
    sprintf(sValue, "%d", mGAS);
    if(SendToDomo(domoticzGasIdx, 0, sValue))
      prevGAS=mGAS;
  }
}

void UpdateElectricity()
{
  char sValue[255];
  sprintf(sValue, "%d;%d;%d;%d;%d;%d", mEVLT, mEVHT, mEOLT, mEOHT, mEAV, mEAT);
  SendToDomo(domoticzEneryIdx, 0, sValue);
}


bool isNumber(char* res, int len) {
  for (int i = 0; i < len; i++) {
    if (((res[i] < '0') || (res[i] > '9'))  && (res[i] != '.' && res[i] != 0)) {
      return false;
    }
  }
  return true;
}

int FindCharInArrayRev(char array[], char c, int len) {
  for (int i = len - 1; i >= 0; i--) {
    if (array[i] == c) {
      return i;
    }
  }
  return -1;
}

long getValidVal(long valNew, long valOld, long maxDiffer)
{
  //check if the incoming value is valid
      if(valOld > 0 && ((valNew - valOld > maxDiffer) && (valOld - valNew > maxDiffer)))
        return valOld;
      return valNew;
}

long getValue(char* buffer, int maxlen) {
  int s = FindCharInArrayRev(buffer, '(', maxlen - 2);
  if (s < 8) return 0;
  if (s > 32) s = 32;
  int l = FindCharInArrayRev(buffer, '*', maxlen - 2) - s - 1;
  if (l < 4) return 0;
  if (l > 12) return 0;
  char res[16];
  memset(res, 0, sizeof(res));

  if (strncpy(res, buffer + s + 1, l)) {
    if (isNumber(res, l)) {
      return (1000 * atof(res));
    }
  }
  return 0;
}

bool decodeTelegram(int len) {
  //need to check for start
  int startChar = FindCharInArrayRev(telegram, '/', len);
  int endChar = FindCharInArrayRev(telegram, '!', len);
  bool validCRCFound = false;
  if(startChar>=0)
  {
    //start found. Reset CRC calculation
    currentCRC=CRC16(0x0000,(unsigned char *) telegram+startChar, len-startChar);
    if(outputOnSerial)
    {
      for(int cnt=startChar; cnt<len-startChar;cnt++)
        Serial.print(telegram[cnt]);
    }    
    //Serial.println("Start found!");
    
  }
  else if(endChar>=0)
  {
    //add to crc calc 
    currentCRC=CRC16(currentCRC,(unsigned char*)telegram+endChar, 1);
    char messageCRC[4];
    strncpy(messageCRC, telegram + endChar + 1, 4);
    if(outputOnSerial)
    {
      for(int cnt=0; cnt<len;cnt++)
        Serial.print(telegram[cnt]);
    }    
    validCRCFound = (strtol(messageCRC, NULL, 16) == currentCRC);
    if(validCRCFound)
      Serial.println("\nVALID CRC FOUND!"); 
    else
      Serial.println("\n===INVALID CRC FOUND!===");
    currentCRC = 0;
  }
  else
  {
    currentCRC=CRC16(currentCRC, (unsigned char*)telegram, len);
    if(outputOnSerial)
    {
      for(int cnt=0; cnt<len;cnt++)
        Serial.print(telegram[cnt]);
    }
  }

  long val =0;
  long val2=0;
  // 1-0:1.8.1(000992.992*kWh)
  // 1-0:1.8.1 = Elektra verbruik laag tarief (DSMR v4.0)
  if (strncmp(telegram, "1-0:1.8.1", strlen("1-0:1.8.1")) == 0) 
    mEVLT =  getValue(telegram, len);
  

  // 1-0:1.8.2(000560.157*kWh)
  // 1-0:1.8.2 = Elektra verbruik hoog tarief (DSMR v4.0)
  if (strncmp(telegram, "1-0:1.8.2", strlen("1-0:1.8.2")) == 0) 
    mEVHT = getValue(telegram, len);
    

  // 1-0:2.8.1(000348.890*kWh)
  // 1-0:2.8.1 = Elektra opbrengst laag tarief (DSMR v4.0)
  if (strncmp(telegram, "1-0:2.8.1", strlen("1-0:2.8.1")) == 0) 
    mEOLT = getValue(telegram, len);
   

  // 1-0:2.8.2(000859.885*kWh)
  // 1-0:2.8.2 = Elektra opbrengst hoog tarief (DSMR v4.0)
  if (strncmp(telegram, "1-0:2.8.2", strlen("1-0:2.8.2")) == 0) 
    mEOHT = getValue(telegram, len);
    

  // 1-0:1.7.0(00.424*kW) Actueel verbruik
  // 1-0:2.7.0(00.000*kW) Actuele teruglevering
  // 1-0:1.7.x = Electricity consumption actual usage (DSMR v4.0)
  if (strncmp(telegram, "1-0:1.7.0", strlen("1-0:1.7.0")) == 0) 
    mEAV = getValue(telegram, len);
    
  if (strncmp(telegram, "1-0:2.7.0", strlen("1-0:2.7.0")) == 0)
    mEAT = getValue(telegram, len);
   

  // 0-1:24.2.1(150531200000S)(00811.923*m3)
  // 0-1:24.2.1 = Gas (DSMR v4.0) on Kaifa MA105 meter
  if (strncmp(telegram, "0-1:24.2.1", strlen("0-1:24.2.1")) == 0) 
    mGAS = getValue(telegram, len);

  return validCRCFound;
}

void readTelegram() {
  if (mySerial.available()) {
    memset(telegram, 0, sizeof(telegram));
    while (mySerial.available()) {
      int len = mySerial.readBytesUntil('\n', telegram, MAXLINELENGTH);
      telegram[len] = '\n';
      telegram[len+1] = 0;
      yield();
      if(decodeTelegram(len+1))
      {
         UpdateElectricity();
         UpdateGas();
      }
    } 
  }
}



void loop() {
  readTelegram();
  ArduinoOTA.handle();
}

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#include <TimeLib.h>

#include <SoftwareSerial.h>

#include <ESP8266WiFi.h>

#include <ESP8266mDNS.h>

#include <ESP8266HTTPClient.h>

#include <WiFiUdp.h>

#include <ArduinoOTA.h>

#include "CRC16.h"

//===Change values from here===

const char* ssid = "WIFISSID";

const char* password = "PASSWORD";

const char* hostName = "ESPP1Meter";

const char* domoticzIP = "192.168.1.35";

const int domoticzPort = 8090;

const int domoticzGasIdx = 291;

const int domoticzEneryIdx = 294;

const bool outputOnSerial = true;

//===Change values to here===

// Vars to store meter readings

long mEVLT = 0; //Meter reading Electrics - consumption low tariff

long mEVHT = 0; //Meter reading Electrics - consumption high tariff

long mEOLT = 0; //Meter reading Electrics - return low tariff

long mEOHT = 0; //Meter reading Electrics - return high tariff

long mEAV = 0; //Meter reading Electrics - Actual consumption

long mEAT = 0; //Meter reading Electrics - Actual return

long mGAS = 0; //Meter reading Gas

long prevGAS = 0;

#define MAXLINELENGTH 64 // longest normal line is 47 char (+3 for \r\n\0)

char telegram[MAXLINELENGTH];

#define SERIAL_RX D5 // pin for SoftwareSerial RX

SoftwareSerial mySerial(SERIAL_RX, -1, true, MAXLINELENGTH); // (RX, TX. inverted, buffer)

unsigned int currentCRC=0;

void SendToDomoLog(char* message)

{

char url[512];

sprintf(url, "http://%s:%d/json.htm?type=command&param=addlogmessage&message=%s", domoticzIP, domoticzPort, message);

}

void setup() {

Serial.begin(115200);

Serial.println("Booting");

WiFi.mode(WIFI_STA);

WiFi.begin(ssid, password);

while (WiFi.waitForConnectResult() != WL_CONNECTED) {

Serial.println("Connection Failed! Rebooting...");

delay(5000);

ESP.restart();

}

mySerial.begin(115200);

// Port defaults to 8266

// ArduinoOTA.setPort(8266);

// Hostname defaults to esp8266-[ChipID]

ArduinoOTA.setHostname(hostName);

// No authentication by default

// ArduinoOTA.setPassword((const char *)"123");

ArduinoOTA.onStart([]() {

Serial.println("Start");

});

ArduinoOTA.onEnd([]() {

Serial.println("\nEnd");

});

ArduinoOTA.onProgress([](unsigned int progress, unsigned int total) {

Serial.printf("Progress: %u%%\r", (progress / (total / 100)));

});

ArduinoOTA.onError([](ota_error_t error) {

Serial.printf("Error[%u]: ", error);

if (error == OTA_AUTH_ERROR) Serial.println("Auth Failed");

else if (error == OTA_BEGIN_ERROR) Serial.println("Begin Failed");

else if (error == OTA_CONNECT_ERROR) Serial.println("Connect Failed");

else if (error == OTA_RECEIVE_ERROR) Serial.println("Receive Failed");

else if (error == OTA_END_ERROR) Serial.println("End Failed");

});

ArduinoOTA.begin();

Serial.println("Ready");

Serial.print("IP address: ");

Serial.println(WiFi.localIP());

}

bool SendToDomo(int idx, int nValue, char* sValue)

{

HTTPClient http;

bool retVal = false;

char url[255];

sprintf(url, "http://%s:%d/json.htm?type=command&param=udevice&idx=%d&nvalue=%d&svalue=%s", domoticzIP, domoticzPort, idx, nValue, sValue);

Serial.printf("[HTTP] GET... URL: %s\n",url);

http.begin(url); //HTTP

int httpCode = http.GET();

// httpCode will be negative on error

if (httpCode > 0)

{ // HTTP header has been send and Server response header has been handled

Serial.printf("[HTTP] GET... code: %d\n", httpCode);

// file found at server

if (httpCode == HTTP_CODE_OK) {

String payload = http.getString();

retVal = true;

}

else

{

Serial.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());

}

http.end();

return retVal;

}

void UpdateGas()

{

//sends over the gas setting to domoticz

if(prevGAS!=mGAS)

{

char sValue[10];

sprintf(sValue, "%d", mGAS);

if(SendToDomo(domoticzGasIdx, 0, sValue))

prevGAS=mGAS;

}

void UpdateElectricity()

{

char sValue[255];

sprintf(sValue, "%d;%d;%d;%d;%d;%d", mEVLT, mEVHT, mEOLT, mEOHT, mEAV, mEAT);

SendToDomo(domoticzEneryIdx, 0, sValue);

}

bool isNumber(char* res, int len) {

for (int i = 0; i < len; i++) {

if (((res[i] < '0') || (res[i] > '9')) && (res[i] != '.' && res[i] != 0)) {

return false;

}

return true;

}

int FindCharInArrayRev(char array[], char c, int len) {

for (int i = len - 1; i >= 0; i--) {

if (array[i] == c) {

return i;

}

return -1;

}

long getValidVal(long valNew, long valOld, long maxDiffer)

{

//check if the incoming value is valid

if(valOld > 0 && ((valNew - valOld > maxDiffer) && (valOld - valNew > maxDiffer)))

return valOld;

return valNew;

}

long getValue(char* buffer, int maxlen) {

int s = FindCharInArrayRev(buffer, '(', maxlen - 2);

if (s < 8) return 0;

if (s > 32) s = 32;

int l = FindCharInArrayRev(buffer, '*', maxlen - 2) - s - 1;

if (l < 4) return 0;

if (l > 12) return 0;

char res[16];

memset(res, 0, sizeof(res));

if (strncpy(res, buffer + s + 1, l)) {

if (isNumber(res, l)) {

return (1000 * atof(res));

}

return 0;

}

bool decodeTelegram(int len) {

//need to check for start

int startChar = FindCharInArrayRev(telegram, '/', len);

int endChar = FindCharInArrayRev(telegram, '!', len);

bool validCRCFound = false;

if(startChar>=0)

{

//start found. Reset CRC calculation

currentCRC=CRC16(0x0000,(unsigned char *) telegram+startChar, len-startChar);

if(outputOnSerial)

{

for(int cnt=startChar; cnt<len-startChar;cnt++)

Serial.print(telegram[cnt]);

}

//Serial.println("Start found!");

}

else if(endChar>=0)

{

//add to crc calc

currentCRC=CRC16(currentCRC,(unsigned char*)telegram+endChar, 1);

char messageCRC[4];

strncpy(messageCRC, telegram + endChar + 1, 4);

if(outputOnSerial)

{

for(int cnt=0; cnt<len;cnt++)

Serial.print(telegram[cnt]);

}

validCRCFound = (strtol(messageCRC, NULL, 16) == currentCRC);

if(validCRCFound)

Serial.println("\nVALID CRC FOUND!");

else

Serial.println("\n===INVALID CRC FOUND!===");

currentCRC = 0;

}

else

{

currentCRC=CRC16(currentCRC, (unsigned char*)telegram, len);

if(outputOnSerial)

{

for(int cnt=0; cnt<len;cnt++)

Serial.print(telegram[cnt]);

}

long val =0;

long val2=0;

// 1-0:1.8.1(000992.992*kWh)

// 1-0:1.8.1 = Elektra verbruik laag tarief (DSMR v4.0)

if (strncmp(telegram, "1-0:1.8.1", strlen("1-0:1.8.1")) == 0)

mEVLT = getValue(telegram, len);

// 1-0:1.8.2(000560.157*kWh)

// 1-0:1.8.2 = Elektra verbruik hoog tarief (DSMR v4.0)

if (strncmp(telegram, "1-0:1.8.2", strlen("1-0:1.8.2")) == 0)

mEVHT = getValue(telegram, len);

// 1-0:2.8.1(000348.890*kWh)

// 1-0:2.8.1 = Elektra opbrengst laag tarief (DSMR v4.0)

if (strncmp(telegram, "1-0:2.8.1", strlen("1-0:2.8.1")) == 0)

mEOLT = getValue(telegram, len);

// 1-0:2.8.2(000859.885*kWh)

// 1-0:2.8.2 = Elektra opbrengst hoog tarief (DSMR v4.0)

if (strncmp(telegram, "1-0:2.8.2", strlen("1-0:2.8.2")) == 0)

mEOHT = getValue(telegram, len);

// 1-0:1.7.0(00.424*kW) Actueel verbruik

// 1-0:2.7.0(00.000*kW) Actuele teruglevering

// 1-0:1.7.x = Electricity consumption actual usage (DSMR v4.0)

if (strncmp(telegram, "1-0:1.7.0", strlen("1-0:1.7.0")) == 0)

mEAV = getValue(telegram, len);

if (strncmp(telegram, "1-0:2.7.0", strlen("1-0:2.7.0")) == 0)

mEAT = getValue(telegram, len);

// 0-1:24.2.1(150531200000S)(00811.923*m3)

// 0-1:24.2.1 = Gas (DSMR v4.0) on Kaifa MA105 meter

if (strncmp(telegram, "0-1:24.2.1", strlen("0-1:24.2.1")) == 0)

mGAS = getValue(telegram, len);

return validCRCFound;

}

void readTelegram() {

if (mySerial.available()) {

memset(telegram, 0, sizeof(telegram));

while (mySerial.available()) {

int len = mySerial.readBytesUntil('\n', telegram, MAXLINELENGTH);

telegram[len] = '\n';

telegram[len+1] = 0;

yield();

if(decodeTelegram(len+1))

{

UpdateElectricity();

UpdateGas();

}

void loop() {

readTelegram();

ArduinoOTA.handle();

}

#ifndef CRC16_H
#define CRC16_H

#if defined(ARDUINO) && ARDUINO >= 100
  #include "Arduino.h"
#else
  #include "WProgram.h"
#endif

unsigned int CRC16(unsigned int crc, unsigned char *buf, int len)
{
	for (int pos = 0; pos < len; pos++)
	{
		crc ^= (unsigned int)buf[pos];    // XOR byte into least sig. byte of crc

		for (int i = 8; i != 0; i--) {    // Loop over each bit
			if ((crc & 0x0001) != 0) {      // If the LSB is set
				crc >>= 1;                    // Shift right and XOR 0xA001
				crc ^= 0xA001;
			}
			else                            // Else LSB is not set
				crc >>= 1;                    // Just shift right
		}
	}

	return crc;
}
#endif

#ifndef CRC16_H

#define CRC16_H

#if defined(ARDUINO) && ARDUINO >= 100

#include "Arduino.h"

#else

#include "WProgram.h"

#endif

unsigned int CRC16(unsigned int crc, unsigned char *buf, int len)

{

for (int pos = 0; pos < len; pos++)

{

crc ^= (unsigned int)buf[pos]; // XOR byte into least sig. byte of crc

for (int i = 8; i != 0; i--) { // Loop over each bit

if ((crc & 0x0001) != 0) { // If the LSB is set

crc >>= 1; // Shift right and XOR 0xA001

crc ^= 0xA001;

}

else // Else LSB is not set

crc >>= 1; // Just shift right

}

return crc;

}

#endif

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P1 poort slimme meter – Data naar Domoticz (ESP8266)

Installation instrucions

Connection of the P1 meter to the ESP8266