Webasto HVH50

jsimonkeller · Post by **jsimonkeller** » Tue Feb 27, 2024 2:02 pm

EV_Builder wrote: ↑Tue Feb 27, 2024 6:47 am Time to fed it HV , 12Vdc and turn it on?

HA! Yes. I am not sure what ID is the write ID though, so I guess I can modify the code to run through all IDs 0-64 . . .

jsimonkeller · Post by **jsimonkeller** » Tue Feb 27, 2024 4:01 pm

OK! So I reinstated the royhen99 code with some modifications and hooked everything up to water, 320V and 12V and ground. I had the controller run through all IDs on the lin.order command and used ID 39 for the lin.response, since this is the only ID that does not return -1. Power set for 1000, Temp set for 100 and UDC in was around 320V.

Code: Select all

#include "lin_bus.h"

// Create an IntervalTimer object 
IntervalTimer myTimer;

int ledState = LOW;                // ledState used to set the LED
unsigned long interval = 200000;   // interval at which to blinkLED to run every 0.2 seconds

LIN lin;

int lin_cs = 32; // cs and serial port set for skpang LIN / FDCAN board
int led1 = 23;
int lin_fault = 28;

uint16_t Power = 1000; // set to required power
uint8_t  Temperature = 100; //set to required temperature
uint16_t tmpheater = 0;
uint16_t udcheater = 0;
uint16_t powerheater = 0;

uint8_t CRC = 0;
uint8_t orderID = 0;
//uint8_t responseID = 0;

uint8_t data[8];

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(lin_fault,INPUT);
  pinMode(lin_cs, OUTPUT);
  digitalWrite(lin_cs, HIGH); // enable MCP2004 LIN transceiver
  digitalWrite(LED_BUILTIN, HIGH);
  
  Serial.begin(115200);
  //Serial.print("HVH50 Heater demo");
  
  //lin.begin(&Serial3, 9600);
  lin.begin(&Serial3, 19200); /// Change to this for 19200 /////
  delay(1000);
  pinMode(led1,OUTPUT);
    digitalWrite(LED_BUILTIN, LOW);
  
  myTimer.begin(blinkLED, interval);
}

void loop() {
  // heater
  SendLin();
  delay(1000); // wait 1000ms
  //Serial.print(" Heater test\n");

}

void blinkLED() {
  ledState = !ledState;
  
  digitalWrite(LED_BUILTIN, ledState);
  digitalWrite(led1, ledState);
}

  static void SendLin()
{
   for (orderID = 0; orderID < 64; orderID++) {

   static bool read = true;
   uint8_t data[8];
   delay(1000); // wait 1000ms
   uint8_t lindata[] = {uint8_t(Power/40), uint8_t(Temperature+40), 0, 8};
   lin.order(orderID, lindata, 4, lin2x); 
   delay(100);
  if (lin.response(39, data, 8, lin2x) >=0) // -1 indicates crc error, 19200
     {
     tmpheater = data[1] - 40;
     udcheater = data[4] | (data[5] & 3) << 8;
     powerheater =((data[5] >> 2) | (data[6] << 8)) * 20;
     Serial.print("orderID:");    
     Serial.print(orderID);
     Serial.print(",");
     Serial.print("Temp:");
     Serial.print(tmpheater);
     Serial.print(",");
     Serial.print("Udc:");
     Serial.print(udcheater);
     Serial.print(",");
     Serial.print("Power:");
     Serial.println(powerheater);
     Serial.print("CRC:");    
     Serial.print(CRC);
     Serial.print(",");
     }
   else if (read)
   {
      lin.order(orderID, lindata, 4, lin2x); 
   }
   else
   {
      uint8_t lindata[] = {uint8_t(Power/40), uint8_t(Temperature+40), 0, 8};
      lin.order(orderID, lindata, 4, lin2x); 
      //Serial.print("\n Sending power and temperature");
   }

   read = !read;
  }
}

The Serial Monitor began working FINALLY and the readings looked like this.

Code: Select all

CRC:0,orderID:0,Temp:21,Udc:60,Power:400
CRC:0,orderID:1,Temp:21,Udc:60,Power:400
CRC:0,orderID:2,Temp:21,Udc:60,Power:400
CRC:0,orderID:3,Temp:21,Udc:60,Power:400
CRC:0,orderID:4,Temp:21,Udc:60,Power:400
CRC:0,orderID:5,Temp:21,Udc:60,Power:400
CRC:0,orderID:6,Temp:21,Udc:60,Power:400
CRC:0,orderID:7,Temp:21,Udc:60,Power:400
CRC:0,orderID:8,Temp:21,Udc:60,Power:400
CRC:0,orderID:9,Temp:21,Udc:60,Power:400
CRC:0,orderID:10,Temp:21,Udc:60,Power:400
CRC:0,orderID:11,Temp:21,Udc:60,Power:400
CRC:0,orderID:12,Temp:21,Udc:60,Power:400
CRC:0,orderID:13,Temp:21,Udc:60,Power:400
CRC:0,orderID:14,Temp:21,Udc:60,Power:400
CRC:0,orderID:15,Temp:21,Udc:60,Power:400
CRC:0,orderID:16,Temp:21,Udc:60,Power:400
CRC:0,orderID:17,Temp:21,Udc:60,Power:400
CRC:0,orderID:18,Temp:21,Udc:60,Power:400
CRC:0,orderID:19,Temp:21,Udc:60,Power:400
CRC:0,orderID:20,Temp:21,Udc:60,Power:400
CRC:0,orderID:21,Temp:21,Udc:60,Power:400
CRC:0,orderID:22,Temp:21,Udc:60,Power:400
CRC:0,orderID:23,Temp:21,Udc:60,Power:1040
CRC:0,orderID:24,Temp:21,Udc:60,Power:400
CRC:0,orderID:25,Temp:21,Udc:60,Power:400
CRC:0,orderID:26,Temp:21,Udc:60,Power:400
CRC:0,orderID:27,Temp:21,Udc:60,Power:400
CRC:0,orderID:28,Temp:21,Udc:60,Power:400
CRC:0,orderID:29,Temp:21,Udc:60,Power:400
CRC:0,orderID:30,Temp:21,Udc:60,Power:400
CRC:0,orderID:31,Temp:21,Udc:60,Power:400
CRC:0,orderID:32,Temp:21,Udc:60,Power:400
CRC:0,orderID:33,Temp:21,Udc:60,Power:400
CRC:0,orderID:34,Temp:21,Udc:60,Power:400
CRC:0,orderID:35,Temp:21,Udc:60,Power:400
CRC:0,orderID:36,Temp:21,Udc:60,Power:400
CRC:0,orderID:37,Temp:21,Udc:60,Power:400
CRC:0,orderID:38,Temp:21,Udc:60,Power:400
CRC:0,orderID:39,Temp:21,Udc:60,Power:1040
CRC:0,orderID:40,Temp:21,Udc:60,Power:400
CRC:0,orderID:41,Temp:21,Udc:60,Power:400
CRC:0,orderID:42,Temp:21,Udc:60,Power:400
CRC:0,orderID:43,Temp:21,Udc:60,Power:400
CRC:0,orderID:44,Temp:21,Udc:60,Power:400
CRC:0,orderID:45,Temp:21,Udc:60,Power:400
CRC:0,orderID:46,Temp:21,Udc:60,Power:400
CRC:0,orderID:47,Temp:21,Udc:60,Power:400
CRC:0,orderID:48,Temp:21,Udc:60,Power:400
CRC:0,orderID:49,Temp:21,Udc:60,Power:400
CRC:0,orderID:50,Temp:21,Udc:60,Power:400
CRC:0,orderID:51,Temp:21,Udc:60,Power:400
CRC:0,orderID:52,Temp:21,Udc:60,Power:400
CRC:0,orderID:53,Temp:21,Udc:60,Power:400
CRC:0,orderID:54,Temp:21,Udc:60,Power:400
CRC:0,orderID:55,Temp:21,Udc:60,Power:400
CRC:0,orderID:56,Temp:21,Udc:60,Power:400
CRC:0,orderID:57,Temp:21,Udc:60,Power:400
CRC:0,orderID:58,Temp:21,Udc:60,Power:400
CRC:0,orderID:59,Temp:21,Udc:60,Power:400
CRC:0,orderID:60,Temp:21,Udc:60,Power:1040
CRC:0,orderID:61,Temp:21,Udc:60,Power:400
CRC:0,orderID:62,Temp:21,Udc:60,Power:400
CRC:0,orderID:63,Temp:21,Udc:60,Power:400

I am working to correct the information being spit out from Serial Monitor. I changed up the code to print out each of the numbered data lines [1]-[8] and this is the printout:

Code: Select all

61,0,0,61,192,0,100,1

61,0,0,60,192,0,100,0

61,0,0,60,192,0,100,1

61,0,0,60,192,0,100,0

61,0,0,60,192,0,100,1

61,0,0,60,192,0,101,0

61,0,0,60,192,0,100,1

61,0,0,60,192,0,100,0

61,0,0,61,192,0,99,1

61,0,0,61,192,0,99,0

61,0,0,60,192,0,101,1

61,0,0,60,192,0,100,0

61,0,0,60,192,0,101,1

I am curious why the final data byte 8 goes back and forth between 0 and 1. The wiki page lists the 8 bytes out. I wonder if the 0,1 back and forth is trying to turn the heater on, but it is not appearing in the correct location.

Code: Select all

 	Status
          	4=running	
          	Outlet temp
		Scaling as above	
		Inlet temp	-	
		Voltage LSB	
		Voltage MSB - 2 bits
		Power LSB - 6 bits / Power MSB 1 digit=20W	
		Unknown

For some reason, the formula in the STM32 version used to decode the data is not giving me accurate info:

Interesting to me that the data readouts by each number are different that the printout of the linRXdata repones of:

Code: Select all

59, 0, 114, 58, 64,0, 239, 0

jsimonkeller · Post by **jsimonkeller** » Sun Mar 03, 2024 7:16 pm

I HAVE HOT WATER!!!!!!

So I went to bed last night thinking about what I was missing and woke up with the thought that there might be info hidden in DATA[0] since DATA[1] was used to calculate temp and I recall Johan mentioning that the on status would be in byte 0, so I modified the code to print out DATA[0] through DATA [8] using lin.response ID 39 and running through all of the lin.order IDs.

I ran this code:

Code: Select all

#include "lin_bus.h"



// Create an IntervalTimer object

IntervalTimer myTimer;



int ledState = LOW;                // ledState used to set the LED

unsigned long interval = 200000;   // interval at which to blinkLED to run every 0.2 seconds



LIN lin;



int lin_cs = 32; // cs and serial port set for skpang LIN / FDCAN board

int led1 = 23;

int lin_fault = 28;



uint16_t Power = 40; // set to required power

uint8_t  Temperature = 85; //set to required temperature

uint16_t tmpheater = 0;

uint16_t udcheater = 0;

uint16_t powerheater = 0;



uint8_t CRC = 0;

uint8_t orderID = 0;

uint8_t responseID = 0;



//uint8_t data[8];



uint8_t linTXdata[4] = { 0, 0, 0, 0 };  // 40W, 45C, heater on

uint8_t linRXdata[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };

//uint8_t CRC = 0;

//uint8_t orderID = 0;

//uint8_t responseID = 0;



void setup() {

  pinMode(LED_BUILTIN, OUTPUT);

  pinMode(lin_fault,INPUT);

  pinMode(lin_cs, OUTPUT);

  digitalWrite(lin_cs, HIGH); // enable MCP2004 LIN transceiver

  digitalWrite(LED_BUILTIN, HIGH);

 

  Serial.begin(115200);

  //Serial.print("HVH50 Heater demo");

 

  //lin.begin(&Serial3, 9600);

  lin.begin(&Serial3, 19200); /// Change to this for 19200 /////

  delay(1000);

  pinMode(led1,OUTPUT);

    digitalWrite(LED_BUILTIN, LOW);

 

  myTimer.begin(blinkLED, interval);

}



void loop() {

  // heater

  SendLin();

  delay(100); // wait 100ms

  //Serial.print(" Heater test\n");



}



void blinkLED() {

  ledState = !ledState;

 

  digitalWrite(LED_BUILTIN, ledState);

  digitalWrite(led1, ledState);

}



  static void SendLin()

{

   for (orderID = 0; orderID < 64; orderID++) {





   static bool read = true;

   uint8_t data[8];

   delay(1000); // wait 1000ms

   lin.order(34, linTXdata, 4, lin2x);

   delay(100);

   CRC = lin.response(39, linRXdata, 8, lin2x);

   lin.response(39, linRXdata, 8, lin2x); //>=0) // -1 indicates crc error, 19200

     {

     tmpheater = linRXdata[1] - 40;

     udcheater = linRXdata[4] | (linRXdata[5] & 3) << 8;

     powerheater =((linRXdata[5] >> 2) | (linRXdata[6] << 8)) * 20;

     //Serial.print("orderID:"); 

     //Serial.print(orderID);

     //Serial.print(",");

     Serial.print("Temp:");

     Serial.print(tmpheater);

     Serial.print(",");

     Serial.print("Udc:");

     Serial.print(udcheater);

     Serial.print(",");

     Serial.print("Power:");

     Serial.println(powerheater);

     Serial.print("CRC:"); 

     Serial.println(CRC);

     Serial.print(linRXdata[0]);

     Serial.print(",");

     Serial.print(linRXdata[1]);

     Serial.print(",");

     Serial.print(linRXdata[2]);

     Serial.print(",");

     Serial.print(linRXdata[2]);

     Serial.print(",");

     Serial.print(linRXdata[4]);

     Serial.print(",");

     Serial.print(linRXdata[5]);

     Serial.print(",");

     Serial.print(linRXdata[6]);

     Serial.print(",");

     Serial.print(linRXdata[7]);

     Serial.print(",");

     Serial.println(linRXdata[8]);

     //Serial.println(data);

  

     }

   //else if (read)

  // {

      lin.order(34, linTXdata, 4, lin2x);

   //}

  // else

   {

      //uint8_t linTXdata[] = {uint8_t(Power/40), uint8_t(Temperature+40), 0, 8};

      lin.order(34, linTXdata, 4, lin2x);

      //Serial.print("\n Sending power and temperature");

   }



   read = !read;

  }

}

with this response:

Code: Select all

orderID:30,Temp:19,Udc:58,Power:320

CRC:0

0,59,0,0,58,64,0,238,27

orderID:31,Temp:19,Udc:58,Power:320

CRC:0

0,59,0,0,58,64,0,238,27

orderID:32,Temp:19,Udc:58,Power:320

CRC:0

0,59,0,0,58,64,0,237,27

orderID:33,Temp:19,Udc:58,Power:320

CRC:0

0,59,0,0,58,64,0,237,27

orderID:34,Temp:19,Udc:58,Power:320

CRC:0

0,59,0,0,58,64,0,239,27

orderID:35,Temp:19,Udc:58,Power:320

CRC:0

128,59,0,0,58,64,0,110,27

orderID:36,Temp:19,Udc:58,Power:320

CRC:0

0,59,0,0,58,64,0,237,27

orderID:37,Temp:19,Udc:58,Power:320

CRC:0

0,59,0,0,58,64,0,237,27

DATA[0] showed 0s until ID 35 and it jumped to 128 at that point. Therefore, I assumed ID34 was causing the change in DATA[0].

I then modified the lin.order command to ID34 with the lin.response on ID39 and water started to heat.

Here is the code I was running:

Code: Select all




#include "lin_bus.h"



// Create an IntervalTimer object

IntervalTimer myTimer;



int ledState = LOW;               // ledState used to set the LED

unsigned long interval = 200000;  // interval at which to blinkLED to run every 0.2 seconds



LIN lin;



uint16_t Power = 400; // set to required power

uint8_t Temperature = 100; //set to required temperature



int lin_cs = 32;  // pin 23 for my LIN board

int led1 = 23;

int lin_fault = 28;



uint8_t linTXdata[4] = { Power, Temperature, 0, 8 };  // 40W, 45C, heater on

uint8_t linRXdata[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };

uint8_t CRC = 0;

uint8_t orderID = 0;

uint8_t responseID = 0;



void setup() {

  pinMode(LED_BUILTIN, OUTPUT);

  pinMode(lin_fault, INPUT);

  pinMode(lin_cs, OUTPUT);

  digitalWrite(lin_cs, HIGH);  // enable MCP2004 LIN transceiver

  digitalWrite(LED_BUILTIN, HIGH);



  Serial.begin(115200);



  lin.begin(&Serial3, 19200);  // or

  //lin.begin(&Serial3, 9600);

  delay(1000);

  pinMode(led1, OUTPUT);

  digitalWrite(LED_BUILTIN, LOW);

}



void loop() {

  //for (orderID = 0; orderID < 64; orderID++) {

    //for (responseID = 0; responseID < 64; responseID++) {



      lin.order(34, linTXdata, 4, lin2x);

      delay(100);



      CRC = lin.response(39, linRXdata, 8, lin2x);

      delay(100);

      Serial.print(34, HEX);

      Serial.print("\t");

      Serial.print(39, HEX);

      Serial.print("\t");

      Serial.println(CRC, HEX);

      for (int i = 0; i < 8; i++) {           // display the raw data

      Serial.print(linRXdata[i]);

      Serial.print("\t");

      Serial.print("\t");

      Serial.print(" ");

      Serial.println();



      delay(10);

    }

  }

//}

//}

Serial Plotter:

Code: Select all

22    27    0

128      

95      

2      

116      

91      

80      

0      

22      

22    27    0

128      

95      

2      

114      

91      

80      

0      

24      

22    27    0

32      

95      

0      

114      

91      

80      

0      

122      

22    27    0

32      

95      

0      

115      

91      

80      

0      

121





22    27    0

32      

89      

0      

117      

89      

80      

0      

127 



22    27    0

32      

88      

0      

115      

88      

80      

0      

131



22    27    0

32      

84      

0      

116      

83      

80      

0      

139      



22    27    0

32      

84      

0      

115      

83      

80      

0      

140



22    27    0

32      

82      

0      

116      

81      

80      

0      

143      



22    27    0

32      

82      

0      

115      

81      

80      

0      

144



22    27    0

32      

80      

0      

116      

80      

80      

0      

146



22    27    0

32      

80      

0      

116      

79      

80      

0      

147



22    27    0

32      

79      

0      

116      

78      

80      

0      

149      





22    27    0

32      

79      

0      

115      

78      

80      

0      

150

Not sure why the 128 in the first bit drops to 32 at some point, but it did not affect the heating as far as I could tell. You can see that the final bit seems to increase over time and I am pretty sure is the temperature. I pasted examples along the way of the number increasing. With an offset of 40, I assume the temps are between 80 and 110 C. I will need to work on the formulas for the output on serial plotter, but I assume those are just for my knowledge and do not affect the heating of the water.

This was only on the VOLVO HVH50 heater out of a CX90, so I will need to sniff the other heaters for their lin.response ID and then lin.order ID, but now I have the blueprints and steps to do it.

--------------------------

THANK YOU THANK YOU THANK YOU ROYHEN99! I would not have been able to do this without your help. You created the initial coding and talked me though the issues I was having and taught me about hoe to code on my own! Thank you Johan for forging the path on the STM32 version to allow us to have the blueprints we needed. The guys at the Teensy forum were invaluable with the lin2x fix, the linbus.cpp fix, the sketches to sniff out a response ID and just teaching me enough that I could experiment on my own to get to this place.

I will update the wiki page with the info for this VOLVO heater. I have two other heaters (from Chrysler Pacificas I believe) and will try to sniff them out as well and will update the wiki page if I figure them out.

royhen99 · Post by **royhen99** » Mon Mar 04, 2024 12:25 am

Good to see that you are getting heat but I think you are looking at the status ID data rather than the measurement ID. From your update in the wiki this seemed a posibility and checking back in some of the previous data there was also a response on ID 23. Maybe check if ID 23 is Read Meas and 39 is Read Status command. Status is 3 bytes so only data[0] to [2] will be valid values.

Couple of other points: you set power to 400 and wrote to an 8 bit variable which has maximum vaule of 255 ( the power set was actually (400-256)*40 = 5760W). The receive array is 8 bytes so only data[0] to data[7] are valid, data[8} is whatever (random) value is in the next memory address.

jsimonkeller · Post by **jsimonkeller** » Mon Mar 04, 2024 4:58 am

royhen99 wrote: ↑Mon Mar 04, 2024 12:25 am you set power to 400 and wrote to an 8 bit variable

If that is the case, do I need to change it from 8 to 16? The heater can handle up to 5000W on the HVH50 and 7000W on the HVH70.

If I use the max 8 bit value of 255, by the formula of (255-256)*40 = -40, right???

royhen99 wrote: ↑Mon Mar 04, 2024 12:25 am Maybe check if ID 23 is Read Meas and 39 is Read Status command

I will do this for sure and let you know.

royhen99 · Post by **royhen99** » Mon Mar 04, 2024 11:03 am

jsimonkeller wrote: ↑Mon Mar 04, 2024 4:58 am If I use the max 8 bit value of 255, by the formula of (255-256)*40 = -40, right???

No, the simplist way it to put the code back to how it was originally with the power sent over LIN the required power / 40.

The 400 - 256 is just truncating a 9 bit number to 8 bits, it's not a general formula for calculating the power. 400 = 0x190, truncating to 8 bits gives 0x90 which is 144, i.e. 400 - 256.

jsimonkeller · Post by **jsimonkeller** » Sun Mar 24, 2024 2:31 pm

I am now convinced I got heated water through dumb luck and wish to re-create it but with solid understanding and the ability to re-create it on command. I went back to the beginning and followed all of our steps again. This time, I used the the scope to help me. At this point, I have confirmed that ID 39 is the Lin Read with 7 bits showing on the scope and ID 23 is the LIN READ STATUS with 3 bits showing. This happens with Lin.Response and the heater powered on with and without HV.

Now I assumed that 34 was the proper ID for Lin.Order because when I was sending all IDs the day I got heat, the data at byte 0 jumped from 0 to 118 and then held at 32. I have not been able to recreate this, though.

Code: Select all

orderID:33,Temp:19,Udc:58,Power:320

CRC:0

0,59,0,115,58,64,0,237,27

orderID:34,Temp:19,Udc:58,Power:320

CRC:0

0,59,0,115,58,64,0,239,27

orderID:35,Temp:19,Udc:58,Power:320

CRC:0

128,59,0,115,58,64,0,110,27

orderID:36,Temp:19,Udc:58,Power:320

CRC:0

0,59,0,115,58,64,0,237,27

I have tried 34 and 35 with no success. I am now considering whether I should be focusing on how the heater initiates and what I might have done accidentally. I am looking at timing and synch. Looking at the node attributes in the HVH100 LDF file, I see:

Code: Select all

Node_attributes {

  HVH_100{

    LIN_protocol = "2.0" ;
    configured_NAD = 0x5F ;
    product_id = 0x0, 0x0, 0 ;
    response_error = PTC_ResponseError ;
    P2_min = 10 ms ;
    ST_min = 10 ms ;
    configurable_frames {
      HV_He_01 = 0x401C ;
      HV_Hs_01 = 0x4030 ;
      HV_Hs_02 = 0x400C ;

I am not sure if any of this needs to be incorporated into the linbus.h or cpp file or my code that is not already there.

Assuming the LDF for the HVH100 is compatible with the HVH50, the frame structure shows:

Code: Select all

Frames {

  HV_He_01: 28, Controller, 4 {
    KL_HV_PTC_soll, 0 ;
    KL_PTC_ein, 8 ;
  }
  H
  V_Hs_01: 48, HVH_100, 8 {
    PTC_HV_I_ist, 0 ;
    PTC_HV_ERR, 8 ;
    PTC_HV_Status_PTC, 16 ;
    PTC_Status_UBatt, 19 ;
    PTC_ResponseError, 21 ;
    PTC_TimeOut_Fehler, 22 ;
    PTC_HV_Err_Heizkreis_1, 24 ;
    PTC_HV_Err_Heizkreis_2, 25 ;
    PTC_HV_Err_Heizkreis_3, 26 ;
    PTC_HV_Err_Leckagestrom, 27 ;
    PTC_HV_Err_Ueberstromabschaltung, 28 ;
    PTC_HV_Err_Temperaturschutz, 29 ;
    PTC_HV_Err_intern, 30 ;
    PTC_UBatt, 32 ;
    PTC_Temp_PCB, 40 ;
    PTC_HV_Heizmedium_Sensor_1, 48 ;
    PTC_HV_Heizmedium_Sensor_2, 56 ;

  }

  HV_Hs_02: 12, HVH_100, 8 {
    HVH_HV_Voltage, 32 ;
    HVH_HV_Voltage_Offset, 41 ;
    HVH_HV_Ilock_Status, 45 ;
    HVH_ParameterChange, 61 ;
    HVH_ErrMem_State, 62 ;
  }

}

Schedule_tables {
 ST1 {
    HV_He_01 delay 20 ms ;
    HV_Hs_01 delay 20 ms ;
    HV_Hs_02 delay 20 ms ;
  }
 DiagRequest {
    MasterReq delay 10 ms ;
  }
 DiagResponse {
    SlaveResp delay 10 ms ;
  }
}

With my German translator, it would seen that the ON command will appear at BIT 8, which is the first bit of the second Databyte and not the fourth one right?

Anyways, I am wondering if you had any ideas for a sketch to sniff this part out, now that we have definitive response and status IDs and try to cause some reaction on their parts or how to incorporate any of the info from the LDF to help us get a response again.

I also wonder if the 255 lin bit value for the initial/power request value needs to be sent before the heater will turn on?

Webasto HVH50

Re: Webasto HVH50

Re: Webasto HVH50

Re: Webasto HVH50

Re: Webasto HVH50

Re: Webasto HVH50

Re: Webasto HVH50

Re: Webasto HVH50