Category: Build It!

DEF Simulator using CanBed board

NOTE: before mounting in the enclosure box, the CanBed needs to be programmed! Please see instructions in the Programming section at the end of this post. Note: The CanBed needs to have a 4 pin connector soldered on to the board Tools: • Drill & bits • Wire cutters / Strippers • Small screw driver • Ohm meter (multi-meter) • Silicone sealant (optional) • Soldering iron & solder Parts list: 1) The CanBed board canLearn More

DSS connector plug for Freightliner chassis (XCM)

Credits: The following content was provided by NMBluept Disclaimer: please use at your own risk, practice due diligence and verify that the information provided applies to and is compatible with your specific equipment and double check your work.   DSS connector plug for Freightliner chassis (XCM) Note for DSS builders: the DT-4 connector used in the instructions for the DSS is not compatible with Freightliner chassis (at least with the XCM chassis). If your DEFLearn More

DEF Sensor Simulator – Quick Build

While there are many variations of hardware and software for this project, this page focuses on one method that is proven to work on the majority of tested motorhomes and endeavors to keep the construction process as straightforward as possible. Only basic electrical and DIY skills are required for the hardware assembly, no soldering is needed. The software installation in this procedure requires a Windows system and only involves typing some simple commands. Before youLearn More


I already have a Raspberry Pi with a CAN interface, can I use that? Not right now, only the Arduino hardware specified is currently supported. There are no immediate plans to port to the RPi, however we may pursue that option when time permits. Will this work on my PowerStroke – Duramax – Dodge Cummins Truck? The short answer is NO! The 1.5, 1 and 3/4 ton Pick-Up trucks all use DEF. However the ECMLearn More

Using an Arduino UNO for Your DEF Simulator

  The DEF Simulator can also be built using an Arduino UNO or ATMega2560 board. The UNO/ATMega2560 boards require the use of an additional board called a CAN shield. Note: It is highly recommended that you program the Arduino board before starting the assembly of the DEF simulator. Please see the Programming section at the bottom of this post. The Arduino UNO or equivalent can be purchased from online retailers such as Amazon. Here isLearn More

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