EPSOLAR VS6048 Solar Charge Controller Monitoring System

Projects Networking, Protocols, and Devices
7

I have run the modbustools software and linked it up with the prototype. A short video is linked below that clearly shows the data exchange between the software running on the laptop and the prototype:

#include <LiquidCrystal.h>
#include <ModbusMaster.h>

// initialize the library by associating any needed LCD interface pin
// with the arduino pin number it is connected to

const int rs = 53, en = 51, d4 = 49, d5 = 47, d6 = 45, d7 = 43;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

// Using MAX485 based Module, following configuration should be used:

// 1. MAX485_DE --> Pin 3 of Arduino
// 2. MAX485_RE_NEG --> Pin 2 of Arduino
// 3. MAX485_RO --> RX Pin of Arduino
// 4. MAX485_DI --> TX Pin of Arduino


#define MAX485_DE      3
#define MAX485_RE_NEG  2

#define PANEL_VOLTS     0x00
#define PANEL_AMPS      0x01
#define PANEL_POWER_L   0x02
#define PANEL_POWER_H   0x03
#define BATT_VOLTS      0x04
#define BATT_AMPS       0x05

// instantiate ModbusMaster object

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() {
  
  // set up the LCD's number of columns and rows:
  lcd.begin(16, 4);

  pinMode(MAX485_RE_NEG, OUTPUT);
  pinMode(MAX485_DE, OUTPUT);
  
  // Init in receive mode
  
  digitalWrite(MAX485_RE_NEG, 0);
  digitalWrite(MAX485_DE, 0);

  // Modbus communication runs at 115200 baud
  Serial1.begin(115200);

  // Modbus slave ID 1

  node.begin(1, Serial1);

  // Callbacks allow us to configure the RS485 transceiver correctly

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

int loopcount=0;

void loop() {
   
  // set the cursor to column 0, l. Line 1 is the second row, since counting begins with 0.
  lcd.setCursor(0, 0);
  
  uint8_t result;
  //uint16_t data[6];
  
 
 // Read 1 registers starting at 0x3100)
  
result = node.readInputRegisters(0x3100, 6);

 if (result == node.ku8MBSuccess)
  {
    float pV = node.getResponseBuffer(PANEL_VOLTS);
    float pI = node.getResponseBuffer(PANEL_AMPS);

    float pP = (node.getResponseBuffer(PANEL_POWER_L) |
                    (node.getResponseBuffer(PANEL_POWER_H) << 8))/100.0f;
   
  float bV = node.getResponseBuffer(BATT_VOLTS);
    //float bI = node.getResponseBuffer(BATT_AMPS);
    

  lcd.setCursor(0, 0);
  lcd.print("VSolar :");
  lcd.print(pV);
  
   lcd.setCursor(0, 1);
   lcd.print("ISolar :");
   lcd.print(pI);
 
  lcd.setCursor(0, 2);
  lcd.print("SolarP:");
  lcd.print(pP);
  
  lcd.setCursor(0, 3);
  lcd.print("BattV :");
  lcd.print(bV);
  
  //lcd.setCursor(0, 2);
  //lcd.print(bI);
} 
else {
  lcd.clear();
  lcd.setCursor(0, 0);
  
  lcd.print("Miss read: ");
  lcd.print(result, HEX);
  lcd.print(loopcount);
  }

loopcount++;
delay(3000);
lcd.clear();
  }