Custom PID for KM since last DPF regeneration

[etnaskynet]

Hello,
I need to monitor my DPF Saturation using your library, with my ESP32 and Bluetooth.
for the mode = 22 and PID = 242C with this formula (A*256+B)/100.

In past when I query with 22242C I received the following string from the ECU:
7E8 05 62 24 2C 01 63
So,
7E8 = identifier
05 = Length (bytes)
62 = response mode marker
24 = PID
2C = PID
01 = A
63 = B

If I convert A and B in decimal (1 and 99 respectively) and applying the formula, the saturation is 3.5 grams, that is correct.

QUESTION:
how can I manage this using your library?
Should I update both .cpp and .h file or directly use processPID in my .ino file?

Thanks in advance for your help.

[jimwhitelaw]

The library doesn't support that type of query using processPID(), but you can use it to get the data you want. Instead, use sendCommand(), and then parse the response in your code. The full response from ELM327 will be available to you in myELM327.payload after calling getResponse().

Include something like this in your loop() method:

    myELM327.sendCommand("22242C");
    if (myELM327.nb_rx_state == ELM_SUCCESS)
    {
        myELM327.getResponse();
        // parse and process the values you want from myELM327.payload
    }
    else if (myELM327.nb_rx_state != ELM_GETTING_MSG)
    {
        myELM327.printError();
    }

[etnaskynet]

IT WORKS.
I used this code:
DPF_KM = myELM327.processPID(34, 9556, 4, 4, 1, 0); //PID 222554; Equation: ((A256)+B)
if (myELM327.nb_rx_state == ELM_SUCCESS)
{
D = myELM327.responseByte_0;
C = myELM327.responseByte_1;
B = myELM327.responseByte_2;
A = myELM327.responseByte_3;
DPF_KM_calc = ((C256)+D);
obd_state= ENG_RPM;
}

and I retrieved the correct data (verified) in Arduino Serial Monitor:
Delimited found.
All chars received: 6225540139
Expected response header: 622554
Single response detected
64-bit response:
responseByte_0: 57
responseByte_1: 0
responseByte_2: 0
responseByte_3: 0
responseByte_4: 0
responseByte_5: 0
responseByte_6: 0
responseByte_7: 0
Service: 34
PID: 9556
Long query detected
Query string: 222554
Clearing input serial buffer
Sending the following command/query: 222554
Received char: 6
Received char: 2
Received char: 2
Received char: 5
Received char: 5
Received char: 4
Received char: 0
Received char: 1
Received char: 3
Received char: 9
Received char: \r

So, after conversion, the KM from last regeneration are 313.

Thanks a lot for your support!