Hey!
So after a long time, I figured it out (with some help!). I have the code ready, just unable to connect it to the car.
For testing purpose, I switched the loop part to light up an led when rpm>1000. But it doesn't work.
I believe it's most probably due to the IAC error (How to set Inquire Access Code (IAC) via AT commands on HC-05 - Programming Questions - Arduino Forum) which I had posted in a different thread.
I'm uploading the code and the circuit diagram. In the circuit, I've tried interchanging 'State' & 'Key' but to no avail.
Would be very thankful if someone could point out what's cooking. At best, the HC05 is blinking twice per 5 seconds.
Regards
Arduino_ODB2_Circular_Buffer.ino (16.2 KB)
