Switch dev

firmware/modbus-sd/modbus-sd-01.ino

@@ -1,23 +1,22 @@
 #include <Wire.h>
 #include <RTClib.h>
 
-#include <ModbusRtu.h>
 #include <SoftwareSerial.h>
-
+#include <ModbusMaster.h>
 #include <SD.h>
 #include <SPI.h>
 
-#define DE_RE_PIN 4
-#define RX_PIN 6     // SoftwareSerial RX pin
-#define TX_PIN 8     // SoftwareSerial TX pin
 #define SD_CS_PIN 10 // Chip Select for SD Card
+//RS485 pins
+#define DE_RE_PIN 4
+#define RX_PIN 3     // SoftwareSerial RX pin
+#define TX_PIN 2     // SoftwareSerial TX pin
+#define SLAVE_ID 101
 
 RTC_DS3231 rtc; // Create an RTC object
 File dataFile;
-
 SoftwareSerial modbusSerial(RX_PIN, TX_PIN); // Create a software serial instance
-Modbus slave(1, modbusSerial, DE_RE_PIN);
+ModbusMaster node;
-uint16_t holdingRegisters[20]; // Array to hold Modbus registers
 
 void setup()
 {
@@ -36,6 +35,7 @@ void setup()
         // Comment out the following line once the time is set to avoid resetting on every start
         rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
     }
+    
     Serial.print("Time: ");
     Serial.print(rtc.now().timestamp());
     Serial.println("\n");
@@ -43,7 +43,8 @@ void setup()
     // Initialize SD card
     Serial.println("SD card initializing...");
     pinMode(SD_CS_PIN, OUTPUT);
-    if (!SD.begin(SPI_HALF_SPEED, SD_CS_PIN))
+    
+    if (!SD.begin(SPI_HALF_SPEED, SD_CS_PIN ))
     {
         Serial.println("SD card initialization failed!\n");
         return;
@@ -51,18 +52,31 @@ void setup()
     Serial.println("SD card initialized.\n");
 
     Serial.println("Initialize RS485 module / Modbus \n");
-    // Initialize RS485 module
+    
-    // Initialize DE and RE pins
+
     pinMode(DE_RE_PIN, OUTPUT);
     digitalWrite(DE_RE_PIN, LOW); // Set to LOW for receiving mode initially
 
-    slave.start();
+    modbusSerial.begin(9600 );
-
+//
-    // Initialize the holding registers
+//    while (!modbusSerial) {
-    // holdingRegisters[0] = 0x0000;
+//    }
-    // holdingRegisters[1] = 0x0000;
+    node.begin(SLAVE_ID, modbusSerial); 
+    node.preTransmission(preTransmission);
+    node.postTransmission(postTransmission);
 }
 
+void preTransmission()
+{
+  digitalWrite(DE_RE_PIN, HIGH); // Enable RS485 transmit
+}
+
+void postTransmission()
+{
+  digitalWrite(DE_RE_PIN, LOW); // Disable RS485 transmit
+}
+
+
 void writeFile(char *str)
 {
     if (!dataFile)
@@ -100,9 +114,28 @@ String getFilename()
 
     return mb;
 }
-
+static unsigned long lastRefreshTime = 0;
 void loop()
 {
+     uint8_t result = result = node.readHoldingRegisters(2705 , 2);
+
+    // Check if the read was successful
+    if (result == node.ku8MBSuccess)
+    {
+      Serial.print("Read successful: ");
+
+    } else {
+      Serial.print("Read error: ");
+      Serial.println(result, HEX);
+    }
+
+
+
+
+    if(millis() - lastRefreshTime >= 1000)
+    {
+      lastRefreshTime += 1000;
+
       Serial.print("Time: ");
       Serial.print(rtc.now().timestamp());
       //   Serial.print("\nHeep:");
@@ -117,30 +150,6 @@ void loop()
   
       dataFile = SD.open(filename.c_str(), FILE_WRITE);
   
-    Serial.print("Error count ");
-    Serial.print(slave.getErrCnt());
-    Serial.print("\n");
-    Serial.print(slave.getLastError());
-    Serial.print("\n");
-
-    //
-    const int result = slave.poll(holdingRegisters, 20);
-    String mb = "modbus,";
-    mb += result;
-    mb += ",";
-    for (int i = 0; i < 20; i++)
-    {
-        mb += holdingRegisters[i];
-        mb += ",";
-    }
-
-    Serial.println(mb.c_str());
-    writeFile(mb.c_str());
-
-    if (modbusSerial.available() > 0)
-    {
-        Serial.println(modbusSerial.read());
-    }
   
       if (dataFile)
       {
@@ -152,5 +161,5 @@ void loop()
   
       Serial.print("\n\n");
       
-    delay(1000); // Delay between readings
+    }
 }