Elm Electronics

As promised, we have updated the ELM327 integrated circuit. The latest firmware (v2.2) offers the following changes:

• AT CS command now shows CAN frequency
• Added 12500 and 15625 bps ISO/KWP baud rates
• New AT CER hh command allows defining the CEA Rx address
• New IFR modes 4,5,6 control J1850 IFR sending while monitoring
• Added PP 1F to allow KWP length to include the checksum byte
• Default value of PP19 increased from 31 to 4F

There are no physical changes with the new ELM327 v2.2 – it remains pin compatible with the previous version.

It’s that time of year again. We take a break from filling orders and answering emails, and spend some time with our families. We do hope that you are able to spend some time with yours.

If you wish to place an order, the system will gladly accept your money. We will not be back to begin filling the orders until January 9, however. As always, we will send you an email when your order does ship.

Best Wishes for 2017 !

A number of people have asked for some small additions to the ELM327 that we agree will enhance the circuit. We’ve been busy adding those changes.

Work is progressing well, and we hope to complete testing soon. When that’s done, and the data sheet has been updated, we will let you know.

We’ve gone all new for 2016. New web servers, new payment processing, new web site software. So glad we did it – hopefully you will be too!

The new ELM329L integrated circuit is now available. It offers all the capability of the latest ELM329 CAN interpreter (firmware version 2.1), and does so over a much wider voltage range (2.0V – 5.5V). It also has a bigger transmit buffer size (now 2048 bytes – the ELM329 has 512 bytes). We’re sure that the ELM329L will soon be just as popular as the ELM327L is.

The ELM329L remains a 28 pin chip, and is available in the 300 mil wide PDIP package (ELM329LP), in the 300 mil SOIC package (ELM329LSM), and in the narrower 5.3mm/208 mil SSOP package (ELM329LSS).

For more details, see the ELM329L page, or download a data sheet by clicking on the PDF link.

ELM329L v2.1
data sheet
(431K pdf)

Interest in connecting to marine networks continues to grow. While the ELM327 and ELM329 integrated circuits were created with cars and light duty trucks in mind, they are certainly capable of interfacing to the NMEA 2000 (N2k) data bus, as related by Owen in this article.

See the NMEA 2000 Project section of the OBD Users page for more information.

We’ve had some suggestions for upgrades to our ELM711 Christmas LEDs driver, and have updated the product to incorporate them, just in time for you to make some new decorations. The new ELM711 integrated circuit now remembers the pattern setting through power offs, can be set to either power on and run the LEDs, or not, and has 16 patterns for you to try.

The new IC is available now.

We’ve finally started adding a table of contents to our data sheets. The most popular ones (the ELM325, ELM327, ELM327L, and ELM329) data sheets were the first to be done, and we’ll do others as they’re updated. Download a copy from the data sheets page:

https://www.elmelectronics.com/products/dsheets/

Been wondering if you might be able to use one of those inexpensive PL-2303HX cables with your next ELM327L project? Maybe with another project? Well the information is pretty thin on just how to use them, so we created this application note. It’s likely just what you need:

App Note 06
(153K pdf)

Just like for our other OBD integrated circuits, the ELM327L data sheet is now available in iBook format. Many find this a convenient way to store and view our information.

It’s 175 pages long, and 11MB in size. Get your free copy through the iTunes store:

ELM327L v2.1
data sheet
(iBook version)