> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # OBD-II UART **Type:** Product page · **SKU:** WIG-09555 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia) **Page:** https://core-electronics.com.au/obd-ii-uart.html ([markdown](https://core-electronics.com.au/obd-ii-uart.html.md)) This board allows you to interface with your car’s OBD-II bus. It provides you a serial interface using the ELM327 command set and supports all major OBD-II standards such as CAN and JBUS. The board also provides a footprint which mates directly to our FTDI Basic or a Bluetooth Mate. The DB9 connector mates with our DB9 to OBD-II cable listed below. ## Pricing - **Price:** $104.95 (inc GST) — $95.41 AUD, exc GST - **Quantity discounts:** 5+ $92.55 (exc GST) · 25+ $90.64 (exc GST) · 100+ $86.82 (exc GST) ## Availability & dispatch - In stock, ships same business day if ordered before 2PM (Australia/Sydney). - We can dispatch 1 today, and up to 11 more in 5–11 days. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=WIG-09555:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/WIG-09555:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description This board allows you to interface with your car’s OBD-II bus. It provides you a serial interface using the ELM327 command set and supports all major OBD-II standards such as CAN and JBUS. The board also provides a footprint which mates directly to our FTDI Basic or a Bluetooth Mate. The DB9 connector mates with our DB9 to OBD-II cable listed below. [DB9 Serial RS232 OBD2 Cable](https://core-electronics.com.au/db9-serial-rs232-obd2-cable.html) On-Board Diagnostics, Second Generation (OBD-II) is a set of standards for implementing a computer based system to control emissions from vehicles. It was first introduced in the United States in 1994, and became a requirement on all 1996 and newer US vehicles. Other countries, including Canada, parts of the European Union, Japan, Australia, and Brazil adopted similar legislation. A large portion of the modern vehicle fleet supports OBD-II or one of its regional flavors. Among other things, OBD-II requires that each compliant vehicle be equipped with a standard diagnostic connector (DLC) and describes a standard way of communicating with the vehicle’s computer, also known as the ECU (Electronic Control Unit). A wealth of information can be obtained by tapping into the OBD bus, including the status of the malfunction indicator light (MIL), diagnostic trouble codes (DTCs), inspection and maintenance (I/M) information, freeze frames, VIN, hundreds of real-time parameters, and more. STN1110 is an OBD to UART interpreter that can be used to convert messages between any of the OBD-II protocols currently in use, and UART. It is fully compatible with the de facto industry standard ELM327 command set. Based on a 16-bit processor core, the STN1110 offers more features and better performance than any other ELM327 compatible IC. **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) - SAE J1850 PWM (Ford vehicles) - Support for non-legislated OBD protocols: - ISO 15765 - ISO 11898 (raw CAN) - Support for SAE J1939 OBD protocol - Superior automatic protocol detection algorithm - Large memory buffer - Voltage input for battery monitoring **Documents:** - [Schematic](https://core-electronics.com.au/attachments/localcontent/OBD-II-UART-v13_62556051de4.pdf) - [Eagle Files](https://core-electronics.com.au/attachments/localcontent/OBD-II-UART-v13_70542e5e531.zip) - Hookup Guide - [OBD=II Guide](https://learn.sparkfun.com/tutorials/getting-started-with-obd-ii) - [Datasheet](https://core-electronics.com.au/attachments/localcontent/stn1110-ds_62057a40bb7.pdf) (STN1110) - [Datasheet ](https://core-electronics.com.au/attachments/localcontent/MCP2551_35217f48ea6.pdf)(MCP2551) - [Datasheet](https://core-electronics.com.au/attachments/localcontent/ELM327DS_3968655bb61.pdf) (ELM327) - [ELM327 Command Set](https://core-electronics.com.au/attachments/localcontent/ELM327_AT_Commands_456204de4a2.pdf) - Compatible Software List - [GitHub Repo](https://github.com/sparkfun/OBD-II_UART) ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/o/b/obd-ii_uart__wig-09555__01.jpg)