Freematics Forum

I had to connect GND from the adapter to the arduino for it to work (see my post for more details). When connecting, lights still flash this way but then they flash every 30 seconds or so when connected.

You are right, I did not connect GND. I tried again with the ground connected to the arduino and this time it worked! (That and turning the car on and waiting a couple of minutes for the whole thing to connect). The blue lights also flash every couple of seconds and I get good data back.
Thank you!

Same problem here, I have a Model B and it won't connect to the car either, the blue light flashes for a second and then the whole thing hangs in obd.init(). Hardware: OBD-II Model B MPU-9150 Hardware: Arduino Mega 2560 Car: Prius 2014 OBDII Protocol: ISO 15765-4 CAN (11 bit ID,500 Kbaud) Software: ...

I have tried to connect the OBD-II Adapter for Arduino - Model B to a 2014 Toyota Prius (ISO 15765-4 CAN | 11-Bit 500k) which should be supported, but the program hangs at obd.init(). I have properly connected the two wires to the SDL/SDA ports and tried to change the protocol in obd.h init() but st...