The car detection Bluetooth OBD application uses hardware + software service. It is necessary to plug a hardware module into the vehicle OBD interface and download the car detection app to realize the physical examination of the vehicle. APP on the mobile phone or professional equipment communicate with OBD hardware device through Bluetooth, which can read the fuel supply system, lubrication system, cooling system, ignition system, starting system and gearbox system of the car, and generate a copy that can be viewed by ordinary car owners. Understand "fuel consumption management", "real-time vehicle condition", "driving record", "physical examination report", etc., provide first-hand information on vehicle maintenance, remote diagnosis, and save the previous status of the vehicle in the cloud through the internet, when the vehicle breaks down, APP can also send messages that describe basic issues such as why the car’s "fault lights" are on to remind the car owner .

1. The working principle of the car detection OBD solution

OBD system monitors whether the car's exhaust gas exceeds the limit at any time from the operating status of the engine. Once the limit is exceeded, it will immediately issue a warning. When the system fails, MIL light or Check Engine warning light is on, and PCM stores the fault information in the memory, and the fault code can be read from the PCM through a certain program . The Bluetooth OBD solution for car detection transmits these fault codes and data to the display via Bluetooth module to display the car's status and problem analysis data.

OBD device monitors multiple systems and components, including engines, catalytic converters, particulate traps, oxygen sensors, emission control systems, fuel systems, EGR, etc. OBD is connected to an ECU through various emission-related component information. The ECU has the function of detecting and analyzing emission-related faults. The OBD hardware device can be connected with the in-car data interface, and then read the data in the dashboard of the car's fuel, mileage and engine information, and finally transfer the data to the car detection adapter by Bluetooth and display on the mobile phone/car control host/cloud mirror, recorder APP and other professional equipment. Feasycom have two modules suit for OBD application:

FSC-BT826B is a dual-mode module, supports classic Bluetooth SPP and BLE modes with excellent Bluetooth compatibility and interoperability. It is a Bluetooth 5.0 high-speed module. The fastest speed of Android and iPhone can reach 85KB/s, and it is cost-effective.

2. The value of the Bluetooth OBD

a. It can help car owners develop good driving habits. Quick start, sudden braking, and speeding are all bad driving methods. According to statistics, fuel consumption will increase by about 33%. The display system will issue a warning tone for the owner when the situation occurs, so as to cultivate the owner's good driving habits.

b. It can access the corresponding code of the engine alarm in the vehicle system, find out and report the specific alarm reason. In this way, car owners can solve small problems themselves. In maintenance and repair, maintenance personnel have a basic basis for analysis and judgment.

For more details about Bluetooth solution, please feel free contact with Feasycom sales team, our firmware and hardware engineers could supply technical supports if you need.