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CAN Hacking: The Hardware

November 5, 2013 By Eric Evenchick33 Comments

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So far we have discussed thebasics of CAN, in-vehicle networks, andprotocols used over CAN. Were going to wrap up with a discussion of CAN

tools, and parts to build your own CAN hardware.

Wiring

Unfortunately, theres no set standard for CAN connections. The most common connector for high-speed CAN is a DE-9, with CAN high on pin 7

and CAN low on pin 2. However cables will differ, and many are incompatible.

CAN needs to be terminated, preferably by a 120 ohm resistance on either end of the bus. In practice, you can stick a single 120 ohm resistor across

the bus to deal with termination.

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3/23



Tools

A good CAN tool will let you transmit and receive CAN messages, interpret live data using CAN databases, and talk CAN protocols. The tools with

this feature set are proprietary and expensive, but some hacker friendly options exist.

GoodThopter

Based on [Travis Goodspeed's] GoodFET, the GoodThopterby [Q] uses the Microchip MCP2515CAN to SPI controller to access the bus. The

open hardware tool lets you send and receive messages using Python scripts.

CAN Bus Triple
http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en010406http://goodfet.sourceforge.net/hardware/goodthopter12/http://hackaday.com/2013/11/05/can-hacking-the-hardware/goodthopter/


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The CAN Bus Tripledevice provides an interface to three CAN buses, and can be programmed in an environment similar to Arduino. The open

source code provided lets you muck with the second generation Mazda 3. Unfortunately, the hardware does not appear to be open source.

Saleae Logic
http://www.canb.us/http://hackaday.com/2013/11/05/can-hacking-the-hardware/canbustriple/


5/23



Its not open source, but the Saleae Logicis a very handy and cheap tool for looking at CAN buses. It can capture, decode, and display CAN traffic.

This is most useful when youre building your own CAN hardware.

DIYThe Parts

If you want to design your own hardware for CAN, youll need two things: a CAN controller, and a CAN transceiver.

The CAN controller generates and interprets CAN messages. Theres many microcontrollers on the market with built-in CAN controllers, such as the

Atmel ATmega32M1

, Freescale S08D, and the TI Tiva C Series. When using a built-in CAN controller, youll have to use an external oscillator,

internal oscillators are not sufficiently accurate for high-speed CAN. If you want to add CAN to an existing microcontroller, the MCP2515 is an

option. Its a standalone CAN controller that communicates over SPI.
http://www.ti.com/lsds/ti/microcontroller/tiva_arm_cortex/c_series/overview.pagehttp://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=S08Dhttp://www.atmel.com/devices/atmega32m1.aspxhttp://www.saleae.com/http://hackaday.com/2013/11/05/can-hacking-the-hardware/saleaelogic/


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The transceiver translates signals from the controller to the bus, and from the bus to the transceiver. Different transceivers are needed for high-speed

and low-speed CAN networks. TheNXP TJA1050works with high-speed buses, and the ON Semi NCV7356works with low-speed, single wire

buses.

Dev Boards

Theres a ton of development boards out there featuring microcontrollers with a CAN controller. The Arduino Dues SAM3 processor has acontroller, but theres no transceiver on the board. You can pick up a CAN bus shield, and the Due CAN Libraryto get started.

The ChipKIT Max32is similar to the Due. It has two CAN controllers, but youll need to provide external transceivers to actually get on a bus.

Fortunately theres a shield for that. The ChipKIT is officially supported by Fords OpenXC Platform

, so you can grab their firmware.

That concludes our discussion of CAN Hacking. Hopefully youre now ready to go out and experiment with the protocol. If you have questions, send

them along to our tip linewith CAN Hacking in the subject, and well compile some answers. If you liked this series and want to suggest a topic for

the next set of posts wed love to hear that as well!

CAN Hacking

Introductions

The In-vehicle Network

CAN Protocols

Building CAN Hardware

Filed Under: Featured,Network HacksTagged With: Arduino DUE

, automotive, CAN, can bus triple

, CAN Hacking, chipkit

,GoodFET, goodthopter

, saleae logic
http://hackaday.com/tag/saleae-logic/http://hackaday.com/tag/goodthopter/http://hackaday.com/tag/goodfet/http://hackaday.com/tag/chipkit/http://hackaday.com/tag/can-hacking/http://hackaday.com/tag/can-bus-triple/http://hackaday.com/tag/can/http://hackaday.com/tag/automotive/http://hackaday.com/tag/arduino-due/http://hackaday.com/category/network-hacks/http://hackaday.com/category/featured/https://plus.google.com/share?text=CAN+Hacking%3A+The%C2%A0Hardware&url=http%3A%2F%2Fhackaday.com%2F2013%2F11%2F05%2Fcan-hacking-the-hardware%2F&via=Hackadayhttps://www.facebook.com/sharer.php?t=CAN+Hacking%3A+The%C2%A0Hardware&u=http%3A%2F%2Fhackaday.com%2F2013%2F11%2F05%2Fcan-hacking-the-hardware%2F&via=Hackadayhttps://twitter.com/intent/tweet?text=CAN+Hacking%3A+The%C2%A0Hardware&url=http%3A%2F%2Fhackaday.com%2F2013%2F11%2F05%2Fcan-hacking-the-hardware%2F&via=Hackadayhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/http://hackaday.com/2013/10/29/can-hacking-protocols/http://hackaday.com/2013/10/22/can-hacking-the-in-vehicle-network/http://hackaday.com/2013/10/21/can-hacking-introductionshttp://hackaday.com/contact-hack-a-day/https://github.com/openxc/vi-firmwarehttp://openxcplatform.com/http://www.digilentinc.com/Products/Detail.cfm?Prod=CHIPKIT-MAX32https://github.com/collin80/due_canhttp://arduino.cc/en/Main/arduinoBoardDuehttp://www.onsemi.com/PowerSolutions/product.do?id=NCV7356)http://www.nxp.com/products/automotive/transceivers/can_transceivers/series/TJA1050.html)


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Comments

1. Anybodysguesssays:

November 5, 2013 at 10:13 am

DUDE! You got to start using breaks!

ReplyReport comment

FrankTheCatsays:

November 5, 2013 at 12:00 pm

Seriously, a break right before the Wiring section would be best. Please.

ReplyReport comment

2. Gdoggsays:


Looks like they connected the saleae wrong

ReplyReport comment

NiNsays:November 5, 2013 at 2:41 pm
http://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092186http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092030#respondhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092030http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092082#respondhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092082http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092023#respondhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092023http://adclick.g.doubleclick.net/pcs/click?xai=AKAOjsuHkBpuGrXai5p3guDY9CBiUM72XhfimKgCLBxab07Zq7mv88wfhEua5DRAZiAgLdn8nkrKRTcbGhohK1SMOQtd0I5U7w&sai=AMfl-YSzcL63cw_0IPDSwWrI1y8dc2f4pJDsxhlu5cB8nuvAXyRBcdtevAv0N_pyzzY&sig=Cg0ArKJSzOw6p8aXn1a6&adurl=http://ads.supplyframe.com/openads/www/delivery/ck.php%3Foaparams%3D2__bannerid%3D72065__zoneid%3D429__cb%3Df8da7c5362__oadest%3Dhttp%253A%252F%252Fanalytics.supplyframe.com%252Ftrackingservlet%252Ftrack%252F%253Faction%253DadClick%2526value1%253D%7Btaxonomy_enc%7D%2526value2%253D72065%2526value3%253D874%2526zone%253D429%2526extra%253Dcontextualmatch%253Dnolimitation%257Ccookietax%253D0%257Ccb%253Df8da7c5362%257Ch_value%253D39e8418b57f1f4f41409496520%257Ch_crc%253D4057766122%257Cgeo%253Dro%257Ccnt%253Deu%257Cbp%253D0.054756105290951%257Cbpf%253D146.30098923346%257Ccp%253D10%257Ch_i%253Dy%2526zone%253D429%2526url%253Dhttp://www.ti.com/tool/msp430-iqmathlib


8/23



They didnt, grey wire is ground, as you can see on the wire label. I suppose it would be more logical if black one was ground, with

channels color-coded same as resistor colors but hey, its Saleae(s) logic. :)

BTW, very nice clone, works with SL software&driver, but costs $9 : http://www.banggood.com/USB-Saleae-24M-8CH-24MHz-

8Channel-Logic-Analyzer-Latest-Support-1_1_15-p-74101.html

ReplyReport comment

xpertsays:


and what about inside ? is circuit same ? dave from EEVBlog teared-down original

ReplyReport comment

Tyler Bletschsays:


My understanding is that they all use the same Cypress chip, so whether its a Saleae or a USBee is just a matter of the

firmware. Now the ancillary components are probably worse, but my knockoff works just fine.

ReplyReport comment

NiNsays:


Yup, same Cypress chip. Isolation chip is also present.

ReplyReport comment

3. Jcereckesays:November 5, 2013 at 10:26 am

Does anyone know the difference/compatibility with the BMW iBus and standard CAN? Ive got a USB-iBus adaptor but wanted a dev board

that lives in the car permanently providing automation.

ReplyReport comment

denissays:


I used a Canbus shield to play with the 100kb k-bus on my E60. toook some faffing but worked eventually. I dont think the i-bus is a
http://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092132http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092033#respondhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092033http://www.ceretech.co.nz/http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1093710#respondhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1093710http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092246#respondhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092246http://discspace.org/http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092241#respondhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092241http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092186#respondhttp://www.banggood.com/USB-Saleae-24M-8CH-24MHz-8Channel-Logic-Analyzer-Latest-Support-1_1_15-p-74101.html


9/23



can bus in the sence of differential signalling etc but it is really well documented online, with only a quick google throwing up schematics

and ready-made interfaces, sure you can hook something to a microcontroller?

ReplyReport comment

4. ejonessssays:


CAN needs to be terminated, preferably by a 120 ohm resistance on either end of the bus.

then does scsi qualify as a can device?

ReplyReport comment

ASsays:


No Whered you get that idea? All transmission lines need to be terminated, otherwise you get reflections from the ends.

ReplyReport comment

5. Hubert S. Cumberdalesays:


what about OBD2 cables

ReplyReport comment

6. wardysays:


+1 for the Saleae Logic. Ive had mine for a couple of years and its still the go-to tool when messing with digital circuits. I was using mine even

today to prove that my Propeller chip was outputting well-formed asynchronous serial data at 2666667 baud. It was :)

I dont care that the Saleaes not open source, because its really very useful indeed.

It is a pity that Saleae are not developing the software anymore though.

ReplyReport comment

7. Drakesays:November 5, 2013 at 12:22 pm
http://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092097http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092083#respondhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092083http://wardyprojects.blogspot.com/http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092040#respondhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092040https://www.facebook.com/hubertscumberdalehttp://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092130#respondhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092130http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092039#respondhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092039http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092132#respond


10/23



Dont think it has been mentioned before but the 2CAN is able to bridge a CAN network to ethernet as well. Then sending and receiving data

can be done via UDP packets.

ReplyReport comment

8. nleahcimsays:


Id suggest doing a little more research about proper CAN termination before giving blatantly wrong information. CAN is run on a 120 ohm diffpair typically and thus needs to be terminated with 120 ohm resistors on *both* ends of the bus. Failure to do so will cause signal integrity

issues. With a short and/or slow bus, you probably will be fine with improper termination. But very frequently improper termination will cause

major problems.

ReplyReport comment

randomcoderdudesays:


+1

ReplyReport comment

adhsays:


While I generally agree with 120R resistors on both ends being the only correct solution, it does seem to not matter much for short buses.

As with short runs of slow speed RS-485 the termination resistors are more important for correct idle bias than transmission line

termination itself. Two wire CAN also in fact isnt true differential bus because of how the protocol works, but two independent single

ended signals that are most of the time sensed as one differential pair, this has to do with how the arbitration and clock recovery works.

In all: I have seen some short-ish CAN buses with single 60R resistor in middle instead of 120R termination on ends (and that was

mostly in vehicles, so it seems to be pretty reliable solution, although weird and I would certainly not recommend doing that).

ReplyReport comment

9. Tyler Bletschsays:


Two questions I havent been able to find answers for:
http://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092134http://discspace.org/http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092548#respondhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092548http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092527#respondhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092527http://randomcoderdude.wordpress.com/http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092115#respondhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092115http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092097#respond


11/23



1. Is the CAN typically used by OBD-2 low- or high-speed, and what are these speeds? Ive seen 125kbps, 250kbps, and 500kbps

mentioned

2. Is there any reason why you couldnt just bitbang this on a regular old microcontroller without extra chips? Its just 0-5V, two pins, and a

resistor, right? Im surprised that all the designs I see involve dedicated CAN chips without mention of manual signaling.

ReplyReport comment

nleahcimsays:November 5, 2013 at 2:18 pm

Tyler CAN could definitely be bitbanged on an MCU that did not have the peripheral. However, you would be best served by having

a CAN transceiver in between the MCU and the CAN bus to handle the physical layer. Your typical CAN nus sits at 2.5V when idle

(weakly pulled to 2.5V), and then the CANL line will go below that and the CANH line will go above that during communication. So

thatd be tricky to replicate with just an MCU.

ReplyReport comment

Tyler Bletschsays:November 5, 2013 at 3:41 pm

Why would that be tricky? Wouldnt this circuit do it?

http://i.imgur.com/lRXqo5H.jpg

ReplyReport comment

Tyler Bletschsays:


Oh wait, I think I get it now it would be hard to detect the 2.5V state, you mean, right?

You could use the analog inputs on an AVR to do this they also function as digital IOs, so you can put a ground or 5V on a

line, or flip it to an analog in to differentiate 0 from 2.5 from 5.

Am I missing something?

ReplyReport comment

Foxdiesays:
http://www.carmodder.com/http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092231#respondhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092231http://discspace.org/http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092226#respondhttp://i.imgur.com/lRXqo5H.jpghttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092226http://discspace.org/http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092173#respondhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092173http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092134#respond


12/23




Hi Tyler,

1. CAN has become a bit of an ambiguous term in the real world, when people say that their car has CAN or CANBUS this will,

more often than not, be a high speed two-wire CAN Bus operating at 500 Kbps. There are many different implementations however,

single wire, different speeds like youve already found.

2. Although on paper it looks like this is possible, again real world environments differ. Firstly, automotive electrical systems are full of

electromagnetic interference (typically from ignition systems and the alternator), additionally (particularly when a car engine is cranked by

a starter motor) massive surges can be sent through the power supply system (aka +VE or +12V) as the alternator starts to kick in, these

voltages often easily spike as high as +40V before settling down

What hasnt been covered in this document is single-wire CAN bus networks. They often bridge +VE (12.. well up to 40V) on the bus

to assert a wake-up signal to ECUs, they also dont use a 120 Ohm resistor to terminate each end of the bus (some implementations use

a 60 Ohm, some dont even use anything but I digress).

ReplyReport comment

10. Harrysays:


I think NXP needs some love here, their LPC11C24 is a great little ARM micro that has an on board CAN transceiver and can be had on a

dev board (LPCxpresso) with a built in programmer for about $30. Fairly straightforward to program using NXPs open source libs as well.

ReplyReport comment

11. tekkieneetsays:November 5, 2013 at 4:53 pm

Tyler: You could simplify the circuit (i.e. save 2 resistors) by having

a 10K pull up on one CAN bus line and a 10K pull down on the other one.

While you could hook up the AVR directly to the CAN bus, I would caution

to read the electrical spec on the CAN bus pins to make sure that they

would not exceed the maximum electrical spec on the AVR side!

http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=sloa101
http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=sloa101http://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092269http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092222#respondhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092222http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092415#respondhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092415


13/23



CAN bus transceivers from TI can handle -2V to 7V CMM range and handle

+/-36V shorts. I would use a proper transceiver for the protection.

ReplyReport comment

12. Bradleysays:


Unfortunately, theres no set standard for CAN connections.

Umm, what about J1939? Yea, there is a standard. Just because some dont follow it, doesnt make the standards disappear.

ReplyReport comment

xadhsays:


J1939 is higher level protocol built on top of CAN that happens to specify some kind of connectors. That does not make these

connectors standard for other uses for CAN.

ReplyReport comment

Francoissays:


+1 J1939 is way more than just a connector, it provide a solution to the issues with Message Id, sender Id, priority and multi

packet messages. It also include a big set of predefined PGN (message) and SPN(channel) that should be sent on a truck.

i work every day with J1939 and i think its a very good high level protocol, even if the whole standard is adapted to Trucks, most

of the high level concepts could be used within any other projects. even if you dont use the J1939-71 messages descriptions, you

could do your own PGNs and SPN descriptions, just dont connect this on a real J1939 network on a truck, you could cause

troubles resulting in injuries or death

ReplyReport comment

13. texanesays:


Hi,
http://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092485http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1093440#respondhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1093440http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092560#respondhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092560http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092294#respondhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092294http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092269#respond


14/23



if it can be useful to someone, I implemented dspic33f based serial to can

bridge whose code can be found here:

https://github.com/texane/scab

Documentation here:

https://github.com/texane/scab/blob/master/doc/latex/main.pdf

Cheers,

Texane.

ReplyReport comment

14. Vaidassays:


Hi everyone,

some time ago I started working on a new hacker-friendly board that would have CAN connectivity, microcontroller with integrated CANperipheral and Arduino compatibility. I came up with something I would call Elduino CAN128 :) If anyone is interested, more information can

be found on my blog:

http://www.electronicsworkshop.eu/Elduino-CAN128-assembly-in-process

It is just in a prototyping stage now and it would be nice to get your opinions about it :)

Thanks!

Vaidas

ReplyReport comment15. Paul Stoffregensays:


Im curious to try CAN, but my car is 19 years old.

I suppose I could just hook 2 microcontrollers together, but thats not very interesting. Im seen some ECU simulators, from $200 to $3000,

which seems pretty spendy.

Can any recommend a cheap source for an actual ECU or other CAN stuff I could just power up on my desk with 12 volts and have it send

CAN messages? Hoping to keep this under $50, if possible?
http://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1104613http://www.pjrc.com/teensy/http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092956#respondhttp://www.electronicsworkshop.eu/Elduino-CAN128-assembly-in-processhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1092956http://www.electronicsworkshop.eu/http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1092485#respondhttps://github.com/texane/scab/blob/master/doc/latex/main.pdfhttps://github.com/texane/scab


15/23



ReplyReport comment

Foxdiesays:


Hi Paul,

Take a look at these pages;

http://mbed.org/handbook/CAN

http://www.skpang.co.uk/catalog/canbus-breakout-board-p-754.html

To set up a basic network, youll need 2 of the breakout boards and one or more mbed LPC1768s. I say one or more because the

LPC1768 has 2 CAN controllers and you can use them both at the same time (ie. get it to talk with itself), or you can use two

LPC1768s and have 2 distinct nodes to play with.

When you connect the breakout boards together, dont be tempted to cross the CAN_H and CAN_L lines (CAN_H should go to

CAN_H etc) and make sure the 120 Ohm jumper is fitted on both boards. If you use one of the boards with a car, 99% of the time youwont need this jumper fitted, its only for when youre building a network outside of an existing one that would already have these

terminating resistors fitted.

When youre ready to step up to deeper stuff, heres a working GMLAN-specific packet sniffer that outputs data to a USB serial port

that comes with the mbed; https://mbed.org/users/foxdie/code/GMLAN-Sniffer/

Although its geared towards GMLAN SWCAN (General Motors implementation of a single-wire CAN Bus) you should be able to pull

a lot out of it for your own gains.

Ps. Yes, you can use one to simulate an ECU or a diagnostic tool, Ive reprogrammed Holden VE head units and done some other

stupid crap with mine; http://www.youtube.com/watch?v=98h9qULPRus

ReplyReport comment

Paul Stoffregensays:


Great. I have an mbed, so far sitting unused. But thats still just having a microcontroller talk to itself.

Im hoping to do something like what this guy did. Scroll down to the photos in week 2:
http://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1104823http://www.pjrc.com/teensy/http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1104639#respondhttp://www.youtube.com/watch?v=98h9qULPRushttps://mbed.org/users/foxdie/code/GMLAN-Sniffer/http://www.skpang.co.uk/catalog/canbus-breakout-board-p-754.htmlhttp://mbed.org/handbook/CANhttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1104639http://www.carmodder.com/http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1104613#respond


16/23



http://mbed.org/users/Just4pLeisure/notebook/frdm-kl25z-library-for-seeed-studio-can-bus-shield/

Hes got a real ECU from some car or truck hooked up. Its sending messages, which the test on the microcontroller is receiving.

Any idea where I might buy such a thing? And also find enough info about it to get it powered up on my desk without the rest of

the intended car attached?

ReplyReport comment16. Paul Stoffregensays:


This:

http://mbed.org/media/uploads/Just4pLeisure/seeed_can_and_t7_ecu.jpg

ReplyReport comment

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Enter your comment here...
http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1104824#respondhttp://mbed.org/media/uploads/Just4pLeisure/seeed_can_and_t7_ecu.jpghttp://hackaday.com/2013/11/05/can-hacking-the-hardware/comment-page-1/#comment-1104824http://www.pjrc.com/teensy/http://hackaday.com/2013/11/05/can-hacking-the-hardware/?replytocom=1104823#respondhttp://mbed.org/users/Just4pLeisure/notebook/frdm-kl25z-library-for-seeed-studio-can-bus-shield/


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