Summary of Vehicle OBD2 Shield with STN1110 IC
This article details the Vehicle OBD2 Shield featuring the STN1110 IC, designed for robust vehicle diagnostics. It supports communication via hardware serial ports on pins 0-1 with 5V or 3.3V lines and powers through an OBD2 port. The chip offers superior protocol support including ISO 15765-4, ISO 14230-4, ISO 9141-2, and SAE J1850 VPW, alongside standard ELM327 and extended ST commands. Key features include low power modes, a secure bootloader for easy firmware upgrades, and a versatile UART interface.
Parts used in the Vehicle OBD2 Shield:
- STN1110 IC
- Hardware serial port (pins 0-1)
- OBD2 port
- Standard ELM327 command set
- Extended ST command set
- Secure bootloader
- UART interface
General Features
- Communicate using the hardware serial port on pins 0-1 either with 5V or 3.3V lines.
- Power the board through vehicle’s OBD2 port.
- Use standard ELM327 commands also with the new extended ST commands for new functionalities.
- Low power modes for safe usage of your vehicles battery especially in permanent installations.
- Superior support of OBD2 protocols, more than any other available IC.
- Firmware of STN1110 can be upgraded easily.
STN1110 Features
- Fully compatible with the ELM327 AT command set
- Extended ST command set
- UART interface (baud rates from 38 bps to 10 Mbps)
- Secure bootloader for easy firmware updates
- Support for all legislated OBD II protocols:
- ISO 15765-4 (CAN)
- ISO 14230-4 (Keyword Protocol 2000)
- ISO 9141-2 (Asian, European, Chrysler vehicles)
- SAE J1850 VPW (GM vehicles)
For more detail: Vehicle OBD2 Shield with STN1110 IC
- How does the board receive power?
The board is powered through the vehicle's OBD2 port. - What voltage levels are supported for serial communication?
Pins 0-1 support either 5V or 3.3V lines for hardware serial communication. - Can the firmware be upgraded easily?
Yes, the firmware of the STN1110 can be upgraded easily using the secure bootloader. - Does this shield support GM vehicles?
Yes, it supports the SAE J1850 VPW protocol specifically for GM vehicles. - What is the baud rate range for the UART interface?
The UART interface supports baud rates ranging from 38 bps to 10 Mbps. - Which protocols are supported for Asian and European vehicles?
The ISO 9141-2 protocol is supported for Asian and European vehicles. - Are there low power modes available?
Yes, low power modes are included for safe usage of the vehicle battery especially in permanent installations.
