Recently, there are some customers consult us about the OBD-II. What is OBD?

On-board diagnostics (OBD) is an automotive term referring to a vehicle's self-diagnostic and reporting capability. OBD systems give the vehicle owner or repair technician access to the status of the various vehicle subsystems.

Modern OBD implementations use a standardized digital communications port to provide real-time data in addition to a standardized series of diagnostic trouble codes, or DTCs, which allow one to rapidly identify and remedy malfunctions within the vehicle.

OBD-II is an improvement over OBD-I in both capability and standardization. The OBD-II standard specifies the type of diagnostic connector and its pin out, the electrical signaling protocols available, and the messaging format

OBD-II provides access to data from the electronic control unit (ECU) and offers a valuable source of information when troubleshooting problems inside a vehicle.

Five signaling protocols are permitted with the OBD-II interface; most vehicles implement only one. It is often possible to deduce the protocol, based on which pins are present on the J1962 connector: SAE J1850 PWM, SAE J1850 VPW, ISO 9141-2 ISO, 14230 KWP2000, ISO 15765 CAN-BUS.

FSC-BT836 module has been involved in many customer OBD cases. This module has won customers' favor with its favorable price and powerful features. 
This module can be used for many projects, asset tracking, wireless POS, Health & Medical devices, HID keyboard for instance.
1. Product size: 26.9*13*2.0mm; v4.2 Bluetooth dual mode.
2. SPP+BLE+ HID support, hardware & firmware customization accept
3. With built-in antenna, Coverage up to 15m (50ft)
4. Max Transmit Power: 5.5 dBm
5. Fully qualified Bluetooth 4.2/4.0/3.0/2.1/2.0/1.2/1.1