Daly BMS to ESP32 Oled and Domoticz

#include <daly-bms-uart.h> // This is where the library gets pulled in

#include <U8g2lib.h>  // Library for display

#include <Wire.h>   // i2c bus for display

#include <WiFi.h>

#include <WiFiMulti.h>

#include <HTTPClient.h>

#include <WiFiClient.h>

// WiFi settings van je eigen netwerk

#define wifi_ssid "Tenda_Spike"

#define wifi_password "johanveerle22"

const int buttonPin = 34; // Button to switch between screens ! 

// variables will change:

int buttonState = 0;         // variable for reading the pushbutton status

// HTTP Domoticz settings

const char* host = "192.168.1.19";

const int   port = 8080;

HTTPClient http;

float volts  = 0;

  float amps = 0;

  float percentage = 0;

float minCellVoltage = 0;

float maxCellVoltage = 0;

  uint8_t maxCellNumber = 0;

  uint8_t minCellNumber = 0;

//By using a wroom you have 2 uart ports, you can't use an wemos D1 

//or other esp 8266 board because the only have 1 and a half uart port

// Constructing the bms driver and passing in the Serial interface (Wroom 32 D16 and D17 for UART 2)

Daly_BMS_UART bms(Serial2);

//U8G2_SSD1306_128X64_NONAME_1_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);

U8G2_SH1106_128X64_NONAME_1_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);

void setup() {

  // This is needed to print stuff to the serial monitor

Serial.begin(115200);

pinMode(buttonPin, INPUT);

u8g2.begin();   // start display

  setup_wifi();  // Start Wifi

  bms.Init();  // Start the BMS

  u8g2.enableUTF8Print();  

  // By using this we just can use some print commando's to the display 

  // same as serial print, otherwise you got some problems with float and integers  

}

void loop() {

  // Grab those values from the BMS

  bms.getPackMeasurements(volts, amps, percentage);

//just testing for the program vithout connection to bms

//amps=20;

//percentage=100;

  // And print them out!

  Serial.printf("V: %4.1f, I: %4.1f, \%:%4.1f\n",volts, amps, percentage);

 Serial.println(buttonState); // The Button is used for changing the diplay status

  bms.getMinMaxCellVoltage(minCellVoltage, minCellNumber, maxCellVoltage, maxCellNumber);

  Serial.printf("Highest Cell Voltage: Cell #%d with voltage %4.3f\n",maxCellNumber,maxCellVoltage);

  Serial.printf("Lowest Cell Voltage: Cell #%d with voltage %4.3f\n",minCellNumber,minCellVoltage);

 buttonState = digitalRead(buttonPin);

 u8g2.setDisplayRotation(U8G2_R0);

    u8g2.setFlipMode(0);

//Scre

 if (buttonState == LOW){ 

  u8g2.firstPage();

 do {

    u8g2.setFont(u8g2_font_6x12_tr);

u8g2.setFont(u8g2_font_luBS18_tf);

 u8g2.setCursor(0, 20);

   u8g2.print(percentage);

    u8g2.print(" %");

u8g2.setFont(u8g2_font_helvB12_tf);  

  u8g2.drawStr(4,44,"U: ");

 u8g2.setCursor(30, 44);

        u8g2.print(volts);  

        u8g2.setCursor(100, 44);

        u8g2.print(" V");  

 u8g2.drawStr(7,60,"I :");

  u8g2.setCursor(30, 60);

    u8g2.print(amps); 

    u8g2.setCursor(100, 60);

    u8g2.println(" A");  

  } while ( u8g2.nextPage() );

  //delay(1000);

 }

 //Screen 2 

 if (buttonState == HIGH){

  u8g2.firstPage();

 do {

 u8g2.setFont(u8g2_font_6x12_tr);

u8g2.setCursor(0, 12);

u8g2.print("SOC: ");

   u8g2.print(percentage);

    u8g2.print(" %");

  u8g2.drawStr(0,22,"U: ");

u8g2.setCursor(30, 22);

 //u8g2.print("U: ");  

        u8g2.print(volts);  

        u8g2.print(" V");  

 u8g2.drawStr(0,30,"I :");

  u8g2.setCursor(30, 30);

    u8g2.print(amps); 

    u8g2.println(" A");  

  u8g2.setFont(u8g2_font_6x12_tr);

u8g2.drawStr(4,38,"min");

u8g2.setCursor(30, 38);

    u8g2.print(minCellVoltage); 

u8g2.drawStr(4,48,"max");

u8g2.setCursor(30, 48);

    u8g2.print(maxCellVoltage); 

u8g2.drawStr(70,38,"cell");

u8g2.setCursor(100, 38);

    u8g2.print(minCellNumber); 

u8g2.drawStr(70,48,"cell");

u8g2.setCursor(100, 48);

    u8g2.print(maxCellNumber); 

u8g2.drawStr(4,58,"Dif");

u8g2.setCursor(30, 58);

    u8g2.print(maxCellVoltage-minCellVoltage); 

u8g2.drawStr(70,12,"Power:");

u8g2.setCursor(70, 22);

    u8g2.print(amps*volts); 

u8g2.setFont(u8g2_font_helvB12_tf);

  } while ( u8g2.nextPage() );

 }

  setvar();  // variable zenden naar domotics

  delay(1000);

}

//Connect to wifi

void setup_wifi() 

{

  delay(10);

   u8g2.firstPage();

 do {

 //u8g2.setDisplayRotation(U8G2_R1);

//  u8g2.setFont(u8g2_font_8x13_tr);

//u8g2.setFont(u8g2_font_luBS18_tf); 

// u8g2.setFont(u8g2_font_6x13_tr);

 u8g2.setFont(u8g2_font_6x10_tr);

u8g2.setCursor(0, 20);

    u8g2.print(wifi_ssid);

  Serial.println();

  Serial.print("Connecting to ");

  Serial.println(wifi_ssid);

  WiFi.begin(wifi_ssid, wifi_password);

  while (WiFi.status() != WL_CONNECTED) 

  {

    delay(500);

    Serial.print(".");

  }

  Serial.println("");

  Serial.println("WiFi connection Established");

  Serial.print("IP Adress : ");

  Serial.print(WiFi.localIP());

u8g2.setFont(u8g2_font_6x10_tr);

//u8g2.setFont(u8g2_font_6x13_tr);

  u8g2.setCursor(0, 35);

u8g2.println("IP Adress : ");

u8g2.setCursor(0, 50);

u8g2.println(WiFi.localIP());;

  } while ( u8g2.nextPage() ); 

}

// this is the part for the connection to domoticz 

void setvar()

{  

  // waardes voor naar domoticz te zenden

// indien van BMS geen juiste waardes worden doorgegeven word er niets naar domoticz gestuurd !!!

if (((amps > -100) && (amps < 100)) && ((percentage > -1) && (percentage < 102))) { 

  // Here is the Json format th Domoticz expects

  // /json.htm?type=command&param=udevice&idx=IDX&nvalue=0&svalue=TEMP

  // VAR1 versturen

  String URLVAR1 = "/json.htm?type=command&param=udevice&idx=";

  URLVAR1 += String(326);   // IDX van je Device in domoticz

  URLVAR1 += "&nvalue=0&svalue="; 

  URLVAR1 += float(volts);  // dit is de waarde die naar de IDX gestuurd word in domoticz

// VAR 2 versturen

  String URLVAR2 = "/json.htm?type=command&param=udevice&idx=";

  URLVAR2 += String(324);   // IDX van je Device in domoticz

  URLVAR2 += "&nvalue=0&svalue="; 

  URLVAR2 += String(amps);  // dit is de waarde die naar de IDX gestuurd word in domoticz

// VAR 3 versturen

  String URLVAR3 = "/json.htm?type=command&param=udevice&idx=";

  URLVAR3 += String(325);   // IDX van je Device in domoticz

  URLVAR3 += "&nvalue=0&svalue="; 

  URLVAR3 += String(percentage);  // dit is de waarde die naar de IDX gestuurd word in domoticz

// VAR 4 versturen

  String URLVAR4 = "/json.htm?type=command&param=udevice&idx=";

  URLVAR4 += String(327);   // IDX van je Device in domoticz

  URLVAR4 += "&nvalue=0&svalue="; 

  URLVAR4 += float(minCellVoltage);  // dit is de waarde die naar de IDX gestuurd word in domoticz

// VAR 5 versturen

  String URLVAR5 = "/json.htm?type=command&param=udevice&idx=";

  URLVAR5 += String(328);   // IDX van je Device in domoticz

  URLVAR5 += "&nvalue=0&svalue="; 

  URLVAR5 += float(maxCellVoltage);  // dit is de waarde die naar de IDX gestuurd word in domoticz

// VAR 6 versturen

  String URLVAR6 = "/json.htm?type=command&param=udevice&idx=";

  URLVAR6 += String(332);   // IDX van je Device in domoticz

  URLVAR6 += "&nvalue=0&svalue="; 

  URLVAR6 += float(maxCellNumber);  // dit is de waarde die naar de IDX gestuurd word in domoticz

// VAR 7 versturen

  String URLVAR7 = "/json.htm?type=command&param=udevice&idx=";

  URLVAR7 += String(333);   // IDX van je Device in domoticz

  URLVAR7 += "&nvalue=0&svalue="; 

  URLVAR7 += float(minCellNumber);  // dit is de waarde die naar de IDX gestuurd word in domoticz

  // VAR / versturen

  String URLVAR8 = "/json.htm?type=command&param=udevice&idx=";

  URLVAR8 += String(331);   // IDX van je Device in domoticz

  URLVAR8 += "&nvalue=0&svalue="; 

  URLVAR8 += float(maxCellVoltage-minCellVoltage);  // dit is de waarde die naar de IDX gestuurd word in domoticz

  // VAR / versturen

  String URLVAR9 = "/json.htm?type=command&param=udevice&idx=";

  URLVAR9 += String(334);   // IDX van je Device in domoticz

  URLVAR9 += "&nvalue=0&svalue="; 

  URLVAR9 += float(amps*volts);  // dit is de waarde die naar de IDX gestuurd word in domoticz

  sendToDomoticz(URLVAR1);

  sendToDomoticz(URLVAR2);

  sendToDomoticz(URLVAR3);

  sendToDomoticz(URLVAR4);

  sendToDomoticz(URLVAR5);

  sendToDomoticz(URLVAR6);

  sendToDomoticz(URLVAR7);

  sendToDomoticz(URLVAR8);

    sendToDomoticz(URLVAR9);

delay (1000);

}

}  

void sendToDomoticz(String URLVAR1)

{

  Serial.print("Connecting to ");

  Serial.println(host);

  Serial.print("Requesting URLVAR1: ");

  Serial.println(URLVAR1);

  http.begin(host,port,URLVAR1);

  int httpCode = http.GET();

    if (httpCode) 

    {

      if (httpCode == 200) 

      {

        String payload = http.getString();

        Serial.println("Domoticz response "); 

        Serial.println(payload);       

      }

    }   

  Serial.println("closing connection");

  http.end();

}