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OBD-II Version

Docking Station built-in OBD-ll protocol
OBD-II*1
RS232*1
GPIO*4
ACC*1
USB Type-A*1
OBD-II-Version1
01
OBD-II
OBD-II (On-Board Diagnostics II) interface is the standard interface of the second-generation on-board diagnostic system, which allows external devices (such as diagnostic instruments) to communicate with the vehicle computer system in a standardized way, so as to monitor and feed back the running status and fault information of the vehicle, and provide important reference information for vehicle owners and maintenance personnel. In addition, the OBD-II interface can also be applied to evaluate the performance status of vehicles, including fuel economy, emissions, etc., to help the owners maintain their vehicles.
Before using the OBD-II scanning tool to diagnose the condition of the vehicle, it must be ensured that the engine of the vehicle is not started. Then insert the plug of the scanning tool into the OBD-II interface located at the lower part of the vehicle cab, and start the tool for diagnostic operation.

RS232
RS232 interface is a standard interface for serial communication between devices, mainly used to connect data terminal equipment (DTE) and data communication equipment (DCE) to realize communication, and is known for its simplicity and wide compatibility. However, the maximun transmission distance is about 15 meters, and the transmission rate is relatively low. The maximum transmission rate is usually 20Kbps.
Generally, RS485, RS422 and RS232 are all serial communication interface standards, but their characteristics and application scenarios are different. In short, the RS232 interface is suitable for applications that do not need long-distance fast data transmission, and it has good compatibility with some old equipment and systems. When it is necessary to transmit data in both directions at the same time and the number of connected devices is less than 10, RS422 may be a better choice. If more than 10 devices need to be connected or a faster transmission rate is needed, RS485 may be more ideal.

· GPIO
GPIO is a set of pins, which can be configured in input mode or output mode. When the GPIO pin is in the input mode, it can receive signals from sensors (such as temperature, humidity, illumination, etc.), and convert these signals into digital signals for tablet processing. When the GPIO pin is in the output mode, it can send control signals to actuators (such as motors and LED lights) to achieve precise controls. GPIO interface can also be used as the physical layer interface of other communication protocols (such as I2C, SPI, etc.), and complex communication functions can be realized through extended circuits.