we all know the JY-mcu BT
http://www.ebay.com/itm/Wireless-Bluetooth-RF-Transceiver-Module-serial-RS232-TTL-HC-05-for-arduino-HE-/400586994100?pt=LH_DefaultDomain_0&hash=item5d44d871b4
i have a piaggio beverly scooter and i want to take from the 3 pins OBD cable the TX RX and transmit to my cell with OBD type application.
i gues that all i need is a JY-MCU bluettoth mdule with RS232 TTL , a 12vto 5v step down regulator and some cable.
the question is , do i need anything else for the OBD protocol ,?