A revised blue colored with improvements in PCB , better selection of components and some minor changes on the schematic, Vehicle OBD2 Shield is now available from our shop.
The big bulky HC49 crystal we used in the previous board is now changed with a modern ceramic surface mount low profile quartz crystal, also there are changes in some component values to improve stability. We made a better selection on their quality, the resistors are 1% tolerance metal film, all electrolytic capacitors on the board are low ESR tantalum type and the heart of the board, scantool’s STN1110 IC, updated to the latest firmware.
For the newcomers the Vehicle OBD2 Shield is an arduino compatible shield, based on Scantool’s STN1110 IC, that helps you get started with your next mobile project. You can find more details in the Vehicle’s OBD2 Shield project page on our website.
If you are a professional engineer , it is an easy way to start prototyping your project. We use it for ourshelves and we always like to share our knowledge.
The heart of this shield is the STN1110 IC from Scantool. You may have heard the ELM327 IC as a chip solution for easy integration with your project and your vehicles electronics. The STN1110 is an evolution of this type of chips.
It’s faster, with much more memory and many more functionalities! It just overwhelm the competition.
Here is a comparison between the STN1110 we use and the closest competitor available.
1 ( STN1110 features 5V tolerant inputs, making it compatible with 5V logic)
This shield support ALL available OBD2 protocols, that means it will work with even more vehicles, not just the newer one with CAN-BUS, like you do with other shields available using only the MCP2551 CAN Transceiver chip.
- Support for all legislated OBD 2 protocols:
- ISO 15765-4 (CAN)
- ISO 14230-4 (Keyword Protocol 2000)
- ISO 9141-2 (Asian, European, Chrysler vehicles)
- SAE J1850 VPW (GM vehicles)
- SAE J1850 PWM (Ford vehicles)
- Support for non-legislated OBD protocols:
- ISO 15765
- ISO 11898 (raw CAN)
Also you don’t have to know the exact protocol of the vehicle you install your device, because this shield has automatic protocol detection. So, you “talk” to all available vehicles using the same way, that’s a must if you want to commercialize your project in the future.
The next days we will release the first public beta version of a library for Arduino that will help you start playing with this shield in seconds! It will help you with the basic communication, like initialize connection with your vehicle’s ECU, check if ignition is on or engine is running and read live values like speed, RPM, etc. In the future we plan to have more software futures available like fuel consumption, engine error codes and more.
So, what if you are an electronic engineer and do it for work, a vehicle hacker or just an enthusiast! grab yourself from our shop this piece of advanced electronics and start sniffing out your car!