Received:

[beeedee]

Hi. i am using elm327 wifi and esp32

My code:

#include <WiFi.h>
#include "ELMduino.h"

const char* ssid = "WiFi-OBDII";
const char* password = "your-password";

//IP Adress of your ELM327 Dongle
IPAddress server(192, 168, 0, 10);
WiFiClient client;
ELM327 myELM327;

uint32_t rpm = 0;

void setup()
{
  Serial.begin(115200);

  // Connecting to ELM327 WiFi
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid);
  // WiFi.begin(ssid, password); //Use this line if your ELM327 has a password protected WiFi

  while (WiFi.status() != WL_CONNECTED)
  {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("Connected to Wifi");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());

  if (client.connect(server, 35000))
    Serial.println("connected");
  else
  {
    Serial.println("connection failed");
    while(1);
  }

  myELM327.begin(client,5);
}

void loop()
{
  float tempRPM = myELM327.rpm();

  if (myELM327.status == ELM_SUCCESS)
  {
    rpm = (uint32_t)tempRPM;
    Serial.print("RPM: "); Serial.println(rpm);
  }
  else{
    printError();
  }
}

void printError()
{
  Serial.print("Received: ");
  for (byte i = 0; i < myELM327.recBytes; i++)
    Serial.write(myELM327.payload[i]);
  Serial.println();

  if (myELM327.status == ELM_SUCCESS)
    Serial.println(F("\tELM_SUCCESS"));
  else if (myELM327.status == ELM_NO_RESPONSE)
    Serial.println(F("\tERROR: ELM_NO_RESPONSE"));
  else if (myELM327.status == ELM_BUFFER_OVERFLOW)
    Serial.println(F("\tERROR: ELM_BUFFER_OVERFLOW"));
  else if (myELM327.status == ELM_UNABLE_TO_CONNECT)
    Serial.println(F("\tERROR: ELM_UNABLE_TO_CONNECT"));
  else if (myELM327.status == ELM_NO_DATA)
    Serial.println(F("\tERROR: ELM_NO_DATA"));
  else if (myELM327.status == ELM_STOPPED)
    Serial.println(F("\tERROR: ELM_STOPPED"));
  else if (myELM327.status == ELM_TIMEOUT)
    Serial.println(F("\tERROR: ELM_TIMEOUT"));
  else if (myELM327.status == ELM_TIMEOUT)
    Serial.println(F("\tERROR: ELM_GENERAL_ERROR"));

  delay(100);
}

My Output:

Received:
Received:
Received:
Received:
Received:

I guess it doesn't meet the following condition if` (myELM327.status == ELM_SUCCESS){}

How can I list if using custom pid? I think the "at" commands are not valid in the wireless network on elm327.Is there an android app where I can list pids? Most importantly, could this problem be caused by custom pid?

[PowerBroker2]

The second argument to begin() is a char, not an int. Try this instead: myELM327.begin(client, '5'); or simply myELM327.begin(client);

[beeedee]

Oh, sorry. Default char '0' not working for my 1996 tigra. I will try again 😀

[beeedee]

This configuration is okey.

I solved the newly arrived timeout issue by increasing the time.but I would be surprised if there was no new problem

How can I write the commands I will use with elm327 to use the above settings in my code

[beeedee]

Hi, connection is ok. at least it looks that way. my new problem rpm is always 0. Should 010C contain a header? And does the parsing of the incoming answers change in case they contain header? I want to send 2 screenshot to help you

I'm still using the top codes. I just edited the .cpp and .h files.

[beeedee]

Finally, the great idea came to my mind. I looked at the Car Scanner's logs. I saw only 2101 pid with 104 characters of data being pulled.

Ex. Outputs. `

2101 B0F111610103050520034020659069563F6789227E0B00000000260D004549225A64C2670A80003D8E0000838C88107E00000076

2101 B0F111610103050520034020509069563F678E227E0B00000000260D004F3C245A64C25E0A80003E8F0000838C88107E0000005E

2101 B0F111610103050520034020489069563F6791227E0B00000000260D005434255A64C2580A80003B8F0000838C88107E0000004E

2101 B0F1116101030505200340204A8E69563F678D337E0B0000000035220057302D5A64C2510A80003A8F0000838C88107E0000007E

2101 B0F1116101030505200340205A8E69563F6796177E0C000000001D00006831495A64BB8012790056910000838C88107E000000B7

2101 B0F111610103050520034020498F69563F676F177E0B000000001C000053383C5A64C17F127900058F0000838C88107E00000015

2101 B0F111610103050520034020699169563F676D177E0A000000001C00003A54345A64C37D127900008D0000838C88107E00000028

2101 B0F11161010305052003402089926A563E677A357E0A000000003624003961365A64C4760A8000298D0000838C88107E000000E2

2101 B0F11161010305052003402065906A563E6776187E0B000000001D0100533D3D5A64C080127900548F0000838C88107E00000091

2101 B0F1116101030505200340206A916A563E676D177E0A000000001C00003955395A64C47E127900038D0000838C88107E00000033

2101 B0F111610103050520034020758E6A563E6773177E0A000000001C0000335D335A64C57D127900018C0000838C88107E0000003A

2101 B0F1116101030505200340207C906A563E6775177E0A000000001C00003360315A64C57C127900008C0000838C88107E00000044 `

and an information I found in my research;

"Name","ShortName","ModeAndPID","Equation","Min Value","Max Value","Units","Header"
"Opel z16XE Multec-S Desire Idle Engine Speed","DesIES","2101","AJ*3187/255","0","3187","rpm","8011F1"
"Opel z16XE Multec-S Engine Speed","EngineSpeed","2101","(AG*256+AH)/4","0","65536","rpm","8011F1"

but I could not give a meaning, I am waiting for your help to interpret. I continue to research too.

[PowerBroker2]

I'm having a very hard time trying to figure out what you're trying to do. Please explain exactly what you're trying to do. Please post your code in tags (no screenshots) and explain what exactly is working and what isn't. Also, it's entirely possible your car doesn't support the same PID structure as true OBDII ports because of how old it is.

[beeedee]

All I want from this device is to read the rpm. But 010C does not work. With 2101, all values ​​come at the same time. I managed to link your library to ecu. but I can't read rpm. You may have an idea as you are working on this library. I want to benefit from your information.

I looked at the logs of the "Car Scanner Pro" application. 010C pids not included in the log. All sensors seem to work with 2101 pid.

I have a sample 2101 output here. B0F1116101030505200340207C906A563E6775177E0A000000001C00003360315A64C57C127900008C0000838C88107E00000044 The above output contains 38 sensor information along with rpm bytes.It is very difficult to understand which byte is where. I thought you might have encountered this because you are working on this library.

now do you have any idea which bytes are rpm.

[PowerBroker2]

Ok, I see. Looks like your car predates the PID specification the library was written for and that's why you aren't getting your values. Also, the lib only supports PID responses that are no more than 64 bytes of integer data (not necessarily 64 ASCII bytes), so your 2101 query wouldn't work regardless. Sorry about that