EPSOLAR solar charge controller monitoring system

Projects General Guidance
5

Thank you very much for your help @Steveiboy @blh64. I was able to extract the data from the charge controller

 #include <ModbusMaster.h>

#define MAX485_DE      2
#define MAX485_RE_NEG  2

ModbusMaster node;

void preTransmission()
{
  digitalWrite(MAX485_RE_NEG, 1);
  digitalWrite(MAX485_DE, 1);
}

void postTransmission()
{
  digitalWrite(MAX485_RE_NEG, 0);
  digitalWrite(MAX485_DE, 0);
}

void setup()
{
  pinMode(MAX485_RE_NEG, OUTPUT);
  pinMode(MAX485_DE, OUTPUT);

  digitalWrite(MAX485_RE_NEG, 0);
  digitalWrite(MAX485_DE, 0);

  Serial1.begin(115200);
  Serial.begin(9600);



  node.begin(1, Serial1);

  node.preTransmission(preTransmission);
  node.postTransmission(postTransmission);

}

bool state = true;

void loop()
{
  uint8_t result;
  uint16_t data[6];

  result = node.readDiscreteInputs(0x3100, 5);

  if (result == node.ku8MBSuccess) {


    Serial.print("Array Power(W): ");
    Serial.println((node.getResponseBuffer(0x02 |
                   node.getResponseBuffer(0x03) << 16) / 100.0f);



  }

  result = node.readInputRegisters(0x3200, 3);

  if (result == node.ku8MBSuccess)
  {

    Serial.print("Battery Status : ");
    Serial.print(node.getResponseBuffer(0x00), HEX);
    Serial.print("\t");

    uint16_t batStatus = node.getResponseBuffer(0x00);
    uint8_t temp = (batStatus & 0x00F0) >> 4; // D7-D4 shifted down

    if ( temp == 0x00 ) {
      Serial.print("Normal (Temp)");
    } else if ( temp == 0x01 ) {
      Serial.print("Over Temp.(Higher than the warning settings)");
    } else if ( temp == 0x02 ) {
      Serial.print("Low Temp.(Lower than the warning settings)");
    }

    Serial.print("\t");


    temp = (batStatus & 0x000F);   // D3-D0

    if ( temp == 0x00 ) {
      Serial.println("Normal (Voltage)");
    } else if ( temp == 0x01 ) {
      Serial.println("Over Voltage.");
    } else if ( temp == 0x02 ) {
      Serial.println("Under Voltage");
    } else if ( temp == 0x03 ) {
      Serial.print("Over discharge");
    } else if ( temp == 0x04 ) {
      Serial.println("Fault (Voltage)");
    }

    Serial.print("Charging Status : ");
    Serial.print(node.getResponseBuffer(0x01), HEX);
    Serial.print("\t");

    uint16_t CharStatus = node.getResponseBuffer(0x01);
    uint8_t Charging = (CharStatus & 0x000C) >> 2; //D3-D2 shifted down

    // Serial.print(Charging,BIN);


    if ( Charging == 0x00 ) {
      Serial.println("No charging");
    } else if ( Charging == 0x01 ) {
      Serial.println("Float");
    } else if ( Charging == 0x02 ) {
      Serial.println("Boost");
    }
    else if ( Charging == 0x03 ) {
      Serial.println("Equalization");
    }


    Serial.print("Array Status : ");
    Serial.print(node.getResponseBuffer(0x01), HEX);
    Serial.print("\t");

    uint16_t ArrStatus = node.getResponseBuffer(0x01);
    uint8_t Arr = (ArrStatus & 0xC000) >> 14; //D15-D14 shifted down

    if ( Arr == 0x00 ) {
      Serial.println("Normal");
    } else if ( Arr == 0x01 ) {
      Serial.println("No input power connected");
    } else if ( Arr == 0x02 ) {
      Serial.println("Higher input voltage");
    }
    else if ( Arr == 0x03 ) {
      Serial.println("Input voltage error");
    }

    Serial.print("Load Status : ");
    Serial.print(node.getResponseBuffer(0x02), HEX);
    Serial.print("\t");

    uint16_t LoadStatus = node.getResponseBuffer(0x02);
    uint8_t Load = (LoadStatus & 0x3000) >> 12; //D3-12 shifted down

    if ( Load == 0x00 ) {
      Serial.println("Light load");
    } else if ( Load == 0x01 ) {
      Serial.println("Moderate");
    } else if ( Load == 0x02 ) {
      Serial.println("Rated");
    }
    else if ( Load == 0x03 ) {
      Serial.println("Overload");
    }

    Serial.print("Device Status : ");
    Serial.print(node.getResponseBuffer(0x00), HEX);
    Serial.print("\n");

    uint16_t DeviceStatus = node.getResponseBuffer(0x00);

    if ( DeviceStatus & 0x8000 ) {
      Serial.println("Wrong identification for rated voltage");
    }

  }
 
  result = node.readDiscreteInputs(0x2000, 1);


  if (result == node.ku8MBSuccess)
  {
  
    uint16_t DeviceStatus = node.getResponseBuffer(0x00);

    if ( DeviceStatus & 0x0040 ) {
      Serial.println("The temperature inside the controller is higher than the over-temperature protection point");
    }
    else {
      Serial.println("Normal");
    }
  }


  Serial.println("===================================================");
  delay(1000);
}