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SDM220_MQTT.ino
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SDM220_MQTT.ino
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/*
************************************************************
Modified by AlexAlx 2020
************************************************************
____ original *** esp-sdm-mqtt - patrik.mayer@codm.de _____
SDMXXX (SDM120 / SDM220 / SDM630) series power meters from eastron over modbus
using an esp8266 and an 3.3V RS485 tranceiver.
This uses the SDM library by reaper7 https://github.com/reaper7/SDM_Energy_Meter
mqtt client from https://github.com/knolleary/pubsubclient/
Tasker from https://github.com/sticilface/Tasker
*/
// MQTT_MAX_PACKET_SIZE : Maximum packet size
#undef MQTT_MAX_PACKET_SIZE // un-define max packet size
#define MQTT_MAX_PACKET_SIZE 512 // fix for MQTT client dropping messages over 128B
#include <Tasker.h>
#include <ESP8266WiFi.h>
#include <ESP8266mDNS.h>
#include <WiFiUdp.h>
#include <ArduinoOTA.h>
#include <PubSubClient.h>
#include <SDM.h>
#include <SoftwareSerial.h>
#include <ArduinoJson.h>
//--------- Configuration
// WiFi
const char* ssid = "***WIFI***"; // Wifi SSID
const char* password = "***PASS***"; // Wifi password
const char* mqttServer = "192.168.xx.xx"; // MQTT server
const char* mqttUser = "***admin***"; // MQTT userid
const char* mqttPass = "***PASS****"; // MQTT password
const char* mqttClientName = "***NAME***"; // MQTT client ID
const char* mqttTopicPrefix = "***NAME***/"; // MQTT root topic for the device, keep / at the end
//MQTT delay read every 60s
int measureDelay = 5000;
// ************ Modbus RS485 settings ************
const int rxPin = 12;
const int txPin = 13;
const int derePin = 4;
const long baud = 9600;
// internal vars
WiFiClient espClient;
PubSubClient mqttClient(espClient);
Tasker tasker;
SoftwareSerial swSerSDM; //config SoftwareSerial
SDM sdm(swSerSDM, baud, derePin, SWSERIAL_8N1, rxPin, txPin); //config SDM
// ********* MQTT parameters ***********
char mqttTopicStatus[64];
char mqttTopicIp[64];
char mqttTopicStat[64];
char mqqtBuff [512];
long lastReconnectAttempt = 0; //For the non blocking mqtt reconnect (in millis)
void setup() {
Serial.begin(115200); //initialize serial
Serial.println("Starting...");
sdm.begin();
//put in mqtt prefix
sprintf(mqttTopicStatus, "%sstatus", mqttTopicPrefix);
sprintf(mqttTopicIp, "%sip", mqttTopicPrefix);
sprintf(mqttTopicStat, "%sSTATUS8", mqttTopicPrefix);
setup_wifi();
mqttClient.setServer(mqttServer, 1883);
tasker.setInterval(meassureSDM, measureDelay);
//----------- OTA -----------------------
MDNS.update();
ArduinoOTA.setHostname(mqttClientName);
//Password authentication
ArduinoOTA.setPassword((const char *)"simaticpanel");
ArduinoOTA.onStart([]() {
String type;
if (ArduinoOTA.getCommand() == U_FLASH) {
type = "sketch";
} else { // U_SPIFFS
type = "filesystem";
}
// NOTE: if updating SPIFFS this would be the place to unmount SPIFFS using SPIFFS.end()
Serial.println("Start updating " + type);
});
ArduinoOTA.onEnd([]() {
Serial.println("\nEnd");
delay(1000);
ESP.restart();
});
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();
}
void loop() {
//handle mqtt connection, non-blocking
if (!mqttClient.connected()) {
long now = millis();
if (now - lastReconnectAttempt > 5000) {
lastReconnectAttempt = now;
// Attempt to reconnect
if (MqttReconnect()) {
lastReconnectAttempt = 0;
}
}
}
mqttClient.loop();
tasker.loop();
//handle OTA
ArduinoOTA.handle();
}
//void meassureSDM(int)
void meassureSDM() {
float v = sdm.readVal(SDM220T_VOLTAGE); //read voltage [V]
float c = sdm.readVal(SDM220T_CURRENT); //read current [A]
float p = sdm.readVal(SDM220T_POWER); //read power [W]
float f = sdm.readVal(SDM220T_FREQUENCY); //read frequency [Hz}
float pf = sdm.readVal(SDM220T_POWER_FACTOR); //read Power Factor []
float pa = sdm.readVal(SDM220T_PHASE_ANGLE); //read Phase Angle [Deg]
float aap = sdm.readVal(SDM220T_ACTIVE_APPARENT_POWER); //read Active Apparent Power [VA]
float rap = sdm.readVal(SDM220T_REACTIVE_APPARENT_POWER); //read Reactive Apparent Power [VAR]
float iae = sdm.readVal(SDM220T_IMPORT_ACTIVE_ENERGY); //read Import Active Energy [Wh]
float eae = sdm.readVal(SDM220T_EXPORT_ACTIVE_ENERGY); //read Export Active Energy [Wh]
float ire = sdm.readVal(SDM220T_IMPORT_REACTIVE_ENERGY); //read Import Active Energy [VARh]
float ere = sdm.readVal(SDM220T_EXPORT_REACTIVE_ENERGY); //read Export Active Energy [VARh]
float tae = sdm.readVal(SDM220T_TOTAL_ACTIVE_ENERGY); //read Export Active Energy [Wh]
float tre = sdm.readVal(SDM220T_TOTAL_REACTIVE_ENERGY); //read Export Active Energy [VARh]
//********* JSon packaging ********************
StaticJsonDocument <512> JSONbuffer;
JSONbuffer["Voltage"] = v;
JSONbuffer["Current"] = c;
JSONbuffer["Power"] = p;
JSONbuffer["Freq"] = f;
JSONbuffer["PowerFactor"] = pf;
JSONbuffer["PhaseAngle"] = pa;
JSONbuffer["ActApparentPwr"] = aap;
JSONbuffer["RctApparentPwr"] = rap;
JSONbuffer["ImpActEnergy"] = iae;
JSONbuffer["ExpActEnergy"] = eae;
JSONbuffer["ImpRctEnergy"] = ire;
JSONbuffer["ExpRctEnergy"] = ere;
JSONbuffer["TotActEnergy"] = tae;
JSONbuffer["TotRctEnergy"] = tre;
serializeJson(JSONbuffer, mqqtBuff);
mqttClient.publish(mqttTopicStat, mqqtBuff );
//******** Serial monitor of values *********
Serial.println( mqqtBuff );
Serial.println();
}
void setup_wifi() {
delay(10);
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.mode(WIFI_STA); //disable AP mode, only station
WiFi.hostname(mqttClientName);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
bool MqttReconnect() {
if (!mqttClient.connected()) {
Serial.print("Attempting MQTT connection...");
// Attempt to connect with last will retained
if (mqttClient.connect(mqttClientName, mqttUser, mqttPass, mqttTopicStatus, 1, true, "offline")) {
Serial.println("connected");
// Once connected, publish an announcement...
char curIp[16];
sprintf(curIp, "%d.%d.%d.%d", WiFi.localIP()[0], WiFi.localIP()[1], WiFi.localIP()[2], WiFi.localIP()[3]);
mqttClient.publish(mqttTopicStatus, "online", true);
mqttClient.publish(mqttTopicIp, curIp, true);
} else {
Serial.print("failed, rc=");
Serial.print(mqttClient.state());
Serial.println(" try again in 5 seconds");
}
}
return mqttClient.connected();
}
//Example tasmota
//stat/SHP6_BD1/STATUS8 = {"StatusSNS":{"Time":"2020-02-21T22:41:29","ENERGY":{"TotalStartTime":"2020-02-11T14:29:03","Total":26.381,"Yesterday":1.234,"Today":1.310,"Power":187,"ApparentPower":