HC-05 V3.0-ELM327 Problem with the connection

Projects Networking, Protocols, and Devices
1

Hey everyone , i've been trying to get information from a standard elm327 bluetooth adapter for the past days with no success, i managed to connect and i get blinking everytime i send a command from the serial monitor, but it is always responding "No Data".
Ps: I tried two different ELM327 adapters and the output was the same
The HC-05 is version 3.0 and its responds to "AT+STATE" with "Connected"
Any help is appreciated since this is for a important university project.

Code:

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



SoftwareSerial mySerial(2, 3);  // RX, TX
#define ELM_PORT mySerial


ELM327 myELM327;


uint32_t rpm = 0;


void setup() {
#if LED_BUILTIN
  pinMode(LED_BUILTIN, OUTPUT);
  digitalWrite(LED_BUILTIN, LOW);
#endif

  Serial.begin(38400);
  ELM_PORT.begin(38400);

  Serial.println("Attempting to connect to ELM327...");
  if (!myELM327.begin(ELM_PORT, true, 2000)) {
    Serial.println("Couldn't connect to OBD scanner");
    while (1)
      ;
  }

  Serial.println("Connected to ELM327");
}


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

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

Serial Monitor Output:

Captura de ecrã 2023-03-27 154334
Captura de ecrã 2023-03-27 154334475×577 6.32 KB

Delimiter found.
All chars received: 010C1NODATA
ELM responded with errror "NO DATA"
Received: 010C1NODATA
ERROR: ELM_NO_DATA
Service: 1
PID: 12
Normal length query detected
Query string: 010C1
Clearing input serial buffer
Sending the following command/query: 010C1

2

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