Latest fixes from Andy

Software/Software.ino

@@ -131,7 +131,7 @@ void loop() {
 #ifdef DUAL_CAN
   receive_can2();
 #endif
-#ifdef SERIAL_LINK_TRANSMITTER_INVERTER
+#ifdef SERIAL_LINK_RECEIVER
   receive_serial();
 #endif
 
@@ -156,7 +156,7 @@ void loop() {
 #ifdef DUAL_CAN
   send_can2();
 #endif
-#ifdef SERIAL_LINK_RECEIVER_FROM_BATTERY
+#ifdef SERIAL_LINK_TRANSMITTER
   send_serial();
 #endif
 }
@@ -226,8 +226,8 @@ void init_modbus() {
   pinMode(PIN_5V_EN, OUTPUT);
   digitalWrite(PIN_5V_EN, HIGH);
 
-#if defined(SERIAL_LINK_RECEIVER_FROM_BATTERY) || defined(SERIAL_LINK_TRANSMITTER_INVERTER)
+#if defined(SERIAL_LINK_RECEIVER) || defined(SERIAL_LINK_TRANSMITTER)
-  Serial2.begin(9600);  // If the Modbus RTU port will be used for serial link
+  Serial2.begin(9600, SERIAL_8N1, RS485_RX_PIN, RS485_TX_PIN);  // If the Modbus RTU port will be used for serial link
 #if defined(BYD_MODBUS) || defined(LUNA2000_MODBUS)
 #error Modbus pins cannot be used for Serial and Modbus at the same time!
 #endif
@@ -399,20 +399,22 @@ void send_can() {
 #endif
 }
 
-#ifdef SERIAL_LINK_RECEIVER_FROM_BATTERY
+#ifdef SERIAL_LINK_RECEIVER
-void send_serial() {
+//---- Receives serial data and transfers to the Inverter
+void receive_serial() {
   static unsigned long currentMillis = millis();
-  if (currentMillis - previousMillis1ms >= interval1) {
+  if (currentMillis - previousMillis1ms > interval1) {  //--- try 2 second
     previousMillis1ms = currentMillis;
     manageSerialLinkReceiver();
   }
 }
 #endif
 
-#ifdef SERIAL_LINK_TRANSMITTER_INVERTER
+#ifdef SERIAL_LINK_TRANSMITTER
-void receive_serial() {
+//---- Gets data from Battery and serial Transmits the data to the Receiver
+void send_serial() {
   static unsigned long currentMillis = millis();
-  if (currentMillis - previousMillis1ms >= interval1) {
+  if (currentMillis - previousMillis1ms > interval1) {  //--- try 2 second
     previousMillis1ms = currentMillis;
     manageSerialLinkTransmitter();
   }

Software/USER_SETTINGS.h

@@ -42,7 +42,7 @@
 //#define CONTACTOR_CONTROL     //Enable this line to have pins 25,32,33 handle automatic precharge/contactor+/contactor- closing sequence
 //#define PWM_CONTACTOR_CONTROL //Enable this line to use PWM logic for contactors, which lower power consumption and heat generation
 //#define DUAL_CAN              //Enable this line to activate an isolated secondary CAN Bus using add-on MCP2515 controller (Needed for FoxESS inverters)
-//#define SERIAL_LINK_RECEIVER_FROM_BATTERY  //Enable this line to send battery data over Modbus pins to another Lilygo (This LilyGo interfaces with battery)
+//#define SERIAL_LINK_RECEIVER  //Enable this line to receive battery data over RS485 pins from another Lilygo (This LilyGo interfaces with inverter)
-//#define SERIAL_LINK_TRANSMITTER_INVERTER  //Enable this line to receive battery data over Modbus pins from another Lilygo (This LilyGo interfaces with inverter)
+//#define SERIAL_LINK_TRANSMITTER  //Enable this line to send battery data over RS485 pins to another Lilygo (This LilyGo interfaces with battery)
 
 #endif

Software/src/battery/BATTERIES.h

@@ -33,7 +33,7 @@
 #include "TEST-FAKE-BATTERY.h"  //See this file for more Fake battery settings
 #endif
 
-#ifdef SERIAL_LINK_RECEIVER_FROM_BATTERY
+#ifdef SERIAL_LINK_RECEIVER
 #include "SERIAL-LINK-RECEIVER-FROM-BATTERY.h"
 #endif
 

Software/src/battery/SERIAL-LINK-RECEIVER-FROM-BATTERY.cpp

@@ -50,6 +50,7 @@ void updateData() {
 
 void manageSerialLinkReceiver() {
   static bool lasterror = false;
+  static unsigned long last_minutesLost = 0;
   static unsigned long lastGood;
   static uint16_t lastGoodMaxCharge;
   static uint16_t lastGoodMaxDischarge;
@@ -67,10 +68,8 @@ void manageSerialLinkReceiver() {
   }
   dataLinkReceive.run();
   bool readError = dataLinkReceive.checkReadError(true);  // check for error & clear error flag
-  LEDcolor = GREEN;
+
   if (readError) {
-    LEDcolor = RED;
-    bms_status = 4;  //FAULT
     Serial.print(currentTime);
     Serial.println(" - ERROR: Serial Data Link - Read Error");
     lasterror = true;
@@ -80,13 +79,13 @@ void manageSerialLinkReceiver() {
       Serial.print(currentTime);
       Serial.println(" - RECOVERY: Serial Data Link - Read GOOD");
     }
-    lastGood = currentTime;
   }
   if (dataLinkReceive.checkNewData(true))  // true = clear Flag
   {
     __getData();
     lastGoodMaxCharge = max_target_charge_power;
     lastGoodMaxDischarge = max_target_discharge_power;
+    lastGood = currentTime;
   }
 
   unsigned long minutesLost = (currentTime - lastGood) / 60000UL;
@@ -99,6 +98,20 @@ void manageSerialLinkReceiver() {
     } else {
       max_target_charge_power = 0;
       max_target_discharge_power = 0;
+      bms_status = 4;  //Fault state
+      LEDcolor = RED;
+      //----- Throw Error
+    }
+    // report Lost data & Max charge / Discharge reductions
+    if (minutesLost != last_minutesLost) {
+      last_minutesLost = minutesLost;
+      Serial.print(currentTime);
+      Serial.print(" - Minutes without data : ");
+      Serial.print(minutesLost);
+      Serial.print(", max Charge = ");
+      Serial.print(max_target_charge_power);
+      Serial.print(", max Discharge = ");
+      Serial.println(max_target_discharge_power);
     }
   }
 

Software/src/battery/SERIAL-LINK-RECEIVER-FROM-BATTERY.h

@@ -30,8 +30,8 @@ extern uint16_t temperature_min;   //C+1,  Goes thru convert2unsignedint16 funct
 extern uint16_t temperature_max;   //C+1,  Goes thru convert2unsignedint16 function (15.0C = 150, -15.0C =  65385)
 extern uint16_t cell_max_voltage;  //mV,   0-4350
 extern uint16_t cell_min_voltage;  //mV,   0-4350
+extern uint8_t LEDcolor;           //Enum, 0-10
 extern bool batteryAllowsContactorClosing;  //Bool, 1=true, 0=false
-extern uint8_t LEDcolor;                    //Enum, 0-10
 
 void manageSerialLinkReceiver();
 

Software/src/inverter/INVERTERS.h

@@ -29,7 +29,7 @@
 #include "SOLAX-CAN.h"
 #endif
 
-#ifdef SERIAL_LINK_TRANSMITTER_INVERTER
+#ifdef SERIAL_LINK_TRANSMITTER
 #include "SERIAL-LINK-TRANSMITTER-INVERTER.h"
 #endif
 

Software/src/inverter/SERIAL-LINK-TRANSMITTER-INVERTER.cpp

@@ -32,6 +32,10 @@ void manageSerialLinkTransmitter() {
   static bool initLink = false;
   static unsigned long updateTime = 0;
   static bool lasterror = false;
+  static unsigned long lastNoError = 0;
+  static unsigned long transmitGoodSince = 0;
+
+  unsigned long currentTime = millis();
 
   dataLinkTransmit.run();
 
@@ -43,28 +47,56 @@ void manageSerialLinkTransmitter() {
   }
 #endif
 
-  if (millis() - updateTime > 100) {
+  if (currentTime - updateTime > 100) {
-    updateTime = millis();
+    updateTime = currentTime;
     if (!initLink) {
       initLink = true;
       // sends variables every 5000mS even if no change
       dataLinkTransmit.setUpdateInterval(5000);
     }
     bool sendError = dataLinkTransmit.checkTransmissionError(true);
-    LEDcolor = GREEN;
     if (sendError) {
-      LEDcolor = RED;
+      Serial.print(currentTime);
-      Serial.print(millis());
       Serial.println(" - ERROR: Serial Data Link - SEND Error");
       lasterror = true;
+      transmitGoodSince = currentTime;
     } else {
       if (lasterror) {
         lasterror = false;
-        Serial.print(millis());
+        Serial.print(currentTime);
         Serial.println(" - RECOVERY: Serial Data Link - Send GOOD");
       }
+      lastNoError = currentTime;
     }
 
+    //--- reporting every 60 seconds that transmission is good
+    if (currentTime - transmitGoodSince > 60000) {
+      transmitGoodSince = currentTime;
+      Serial.print(currentTime);
+      Serial.println(" - Transmit Good");
+    }
+
+    //--- report that Errors been ocurring for > 60 seconds
+    if (currentTime - lastNoError > 60000)  // 60 seconds
+    {
+      Serial.print(currentTime);
+      Serial.println(" - Transmit Failed : 60 seconds");
+      bms_status = 4;  //FAULT
+      LEDcolor = RED;
+      // throw error
+    }
+    /*
+		//  lastMessageReceived from CAN bus (Battery)
+		if (currentTime - lastMessageReceived > (5 * 60000) )  // 5 minutes
+		{
+			Serial.print(millis());
+			Serial.println(" - Data Stale : 5 minutes");
+			// throw error
+			
+			// stop transmitting until fresh
+		}
+		*/
+
     dataLinkTransmit.updateData(0, SOC);
     dataLinkTransmit.updateData(1, StateOfHealth);
     dataLinkTransmit.updateData(2, battery_voltage);

Software/src/inverter/SERIAL-LINK-TRANSMITTER-INVERTER.h

@@ -24,8 +24,8 @@ extern uint16_t temperature_min;   //C+1,  Goes thru convert2unsignedint16 funct
 extern uint16_t temperature_max;   //C+1,  Goes thru convert2unsignedint16 function (15.0C = 150, -15.0C =  65385)
 extern uint16_t cell_max_voltage;  //mV,   0-4350
 extern uint16_t cell_min_voltage;  //mV,   0-4350
+extern uint8_t LEDcolor;           //Enum, 0-10
 extern bool batteryAllowsContactorClosing;  //Bool, 1=true, 0=false
-extern uint8_t LEDcolor;                    //Enum, 0-10
 
 void manageSerialLinkTransmitter();
 

Software/src/lib/mackelec-SerialDataLink/SerialDataLink.cpp

@@ -49,9 +49,12 @@ union Convert
   };
 }convert;
 
-
+/*
-
+#define SET_PA6() (GPIOA->BSRR = GPIO_BSRR_BS6)
-
+#define CLEAR_PA6() (GPIOA->BSRR = GPIO_BSRR_BR6)
+// Macro to toggle PA6
+#define TOGGLE_PA6() (GPIOA->ODR ^= GPIO_ODR_ODR6)
+*/
 
 // Constructor
 SerialDataLink::SerialDataLink(Stream &serial, uint8_t transmitID, uint8_t receiveID, uint8_t maxIndexTX, uint8_t maxIndexRX, bool enableRetransmit)
@@ -167,10 +170,9 @@ void SerialDataLink::run()
           } 
           else 
           {
-              
               constructPacket(); // Construct a new packet if not currently transmitting
               
-              if (muteAcknowledgement)
+              if (muteAcknowledgement  && (needToACK || needToNACK))
               {
                 needToACK = false;
                 needToNACK = false;
@@ -269,13 +271,11 @@ void SerialDataLink::constructPacket()
   {
     lastTransmissionTime = millis();
     txBufferIndex = 0; // Reset the TX buffer index
-
     addToTxBuffer(headerChar);
     addToTxBuffer(transmitID);
     addToTxBuffer(0); // EOT position - place holder
     unsigned long currentTime = millis();
     int count = txBufferIndex;
-
     for (uint8_t i = 0; i < maxIndexTX; i++)
     {
       if (dataUpdated[i] || (currentTime - lastSent[i] >= updateInterval))
@@ -352,6 +352,7 @@ bool SerialDataLink::ackReceived()
         if (nextByte == headerChar) 
         {
             requestToSend = true;
+            transmissionError = true;
             return false;
         }
 
@@ -372,12 +373,11 @@ bool SerialDataLink::ackReceived()
               requestToSend = true;
           case NACK_CODE:
               transmissionError = true;
-              return false;
+              return true;
       
           default:
               break;
       }
-
     }
 
     return false; // No ACK, NACK, or new packet received
@@ -386,7 +386,9 @@ bool SerialDataLink::ackReceived()
 bool SerialDataLink::ackTimeout() 
 {
     // Check if the current time has exceeded the last transmission time by the ACK timeout period
-    if (millis() - lastTransmissionTime > ACK_TIMEOUT) {
+    
+    if (millis() - lastTransmissionTime > ACK_TIMEOUT) 
+    {
         return true;  // Timeout occurred
     }
     return false;  // No timeout
@@ -397,9 +399,10 @@ bool SerialDataLink::ackTimeout()
 void SerialDataLink::read()
 {
   if (maxIndexRX < 1) return;
-  if (serial.available()) 
+  int count = 0;
+  while (serial.available() && count < 10)
   {
-    //Serial.print(".");
+    count++;
     if (millis() - lastHeaderTime > PACKET_TIMEOUT  && rxBufferIndex > 0) 
     {
       // Timeout occurred, reset buffer and pointer

Software/src/lib/mackelec-SerialDataLink/SerialDataLink.h

@@ -50,6 +50,8 @@
 
 #include <Arduino.h>
 
+
+
 class SerialDataLink {
 public:
     // Constructor
@@ -128,12 +130,12 @@ private:
     bool    dataUpdated[dataArraySizeTX];
     unsigned long lastSent[dataArraySizeTX];
     
-    unsigned long updateInterval = 500;
+    unsigned long updateInterval = 1000;
-    unsigned long ACK_TIMEOUT = 100;
+    unsigned long ACK_TIMEOUT = 200;
-    unsigned long PACKET_TIMEOUT = 100; // Timeout in milliseconds
+    unsigned long PACKET_TIMEOUT = 200; // Timeout in milliseconds
 
     unsigned long lastStateChangeTime = 0;
-    unsigned long stateChangeTimeout = 200;
+    unsigned long stateChangeTimeout = 300;
 
     // Special characters for packet framing
     char headerChar = '<';