I have a few ideas I want to play with on my car. In all my nonexistent spare time, I am looking into a linux CAN logger. Anyone done any work in this area and have anything to share?
Any interest in E60 CAN bus code hacking?
jcolley
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Thanks for the very quick reply!Yeah that's the proper termination for the K-can. Take a look at the arduino sketch here.
https://github.com/pavelmalik/BMWCanBridge
Let me guess, you wanna tie exhaust cut outs into the m-mode?
Yup... you're spot on - I want to do as rt7085 did and have an M-mode and RPM dependent exhaust valve operation. My current setup is conveniently operated from my Homelink buttons on my rear view mirror, however I want some more smarts around the switching (mostly just for the fun of tinkering, to be honest).
Thanks for the link to your code! It looks like you are using the Due, which I believe has can bus built in? I will be using a Nano + MC2515 module, but I think I shall be able to use some elements of your code.
This is my first foray into Arduino, so perhaps I am trying to run before I can walk.
Hi all,
Basically, I want my exhaust to operate as follows:
When M-mode is off, exhaust will remain closed (quiet), but open (loud) when RPM>4000 & throttle>50%
When M-mode is on, exhaust will remain open (loud) under all conditions
I have been able to sniff the K-Can using the Arduino Nano + MCP2515 combination without too much trouble. I am able to determine RPM from the ArbID 0xAA and M-Mode from 0x399 as suggested, however I would also like to determine throttle (pedal) position.
I am determining statuses as follows:
M-Mode by testing for the value of byte 1 (byte[1] = 81 then M-drive is off, if byte[1] = 82 then M-drive is on) on ArbID 0x399
RPM by calculating (byte[5]*256+byte(4))/4 of ArbID 0xAA
According to the amazing work on this site CAN BUS Codes, I should be able to calculate the throttle position from bytes 2 and 3 of ArbID 0xAA, however I am not able to determine the correct transfer function.
Does anyone have any hints as to how to determine throttle position?
I shall post up by Arduino sketch here once I have it all completed for others to use.
Basically, I want my exhaust to operate as follows:
When M-mode is off, exhaust will remain closed (quiet), but open (loud) when RPM>4000 & throttle>50%
When M-mode is on, exhaust will remain open (loud) under all conditions
I have been able to sniff the K-Can using the Arduino Nano + MCP2515 combination without too much trouble. I am able to determine RPM from the ArbID 0xAA and M-Mode from 0x399 as suggested, however I would also like to determine throttle (pedal) position.
I am determining statuses as follows:
M-Mode by testing for the value of byte 1 (byte[1] = 81 then M-drive is off, if byte[1] = 82 then M-drive is on) on ArbID 0x399
RPM by calculating (byte[5]*256+byte(4))/4 of ArbID 0xAA
According to the amazing work on this site CAN BUS Codes, I should be able to calculate the throttle position from bytes 2 and 3 of ArbID 0xAA, however I am not able to determine the correct transfer function.
Does anyone have any hints as to how to determine throttle position?
I shall post up by Arduino sketch here once I have it all completed for others to use.
Thank you very much Jim.
I was calculating it using Pedal % = (byte[3]*256+byte[2])/(256^2), as according to the loopybunny site the throttle was spread across a highbyte/lowbyte.
I shall try your method instead, which is mathematically equivalent to the above formula when ignoring byte 2.
Hello all,
I have finished compiling some code to sniff the K-CAN and switch the exhaust under the conditions described.
I used the MCP2515 can bus module library and example code from this source: https://github.com/autowp/arduino-mcp2515#library-installation
as it is a bit more flexible than the SparkFun sketch; the MCP2515 module I have has a 8MHz oscillator, unlike the SparkFun shield, which uses a 16 MHz oscillator.
Please note, my code should be considered beta, as I am yet to road test it. I have only confirmed its operation using a CAN emulator.
<spi.h><mcp2515.h><canmsg.can_dlc; i++)="" {="" print="" the="" data
<spi.h><mcp2515.h><canmsg.can_dlc; i++)="" {="" print="" the="" data
</canmsg.can_dlc;></mcp2515.h></spi.h></canmsg.can_dlc;></mcp2515.h></spi.h>
I have finished compiling some code to sniff the K-CAN and switch the exhaust under the conditions described.
I used the MCP2515 can bus module library and example code from this source: https://github.com/autowp/arduino-mcp2515#library-installation
as it is a bit more flexible than the SparkFun sketch; the MCP2515 module I have has a 8MHz oscillator, unlike the SparkFun shield, which uses a 16 MHz oscillator.
Please note, my code should be considered beta, as I am yet to road test it. I have only confirmed its operation using a CAN emulator.
<spi.h><mcp2515.h><canmsg.can_dlc; i++)="" {="" print="" the="" data
<spi.h><mcp2515.h><canmsg.can_dlc; i++)="" {="" print="" the="" data
</canmsg.can_dlc;></mcp2515.h></spi.h></canmsg.can_dlc;></mcp2515.h></spi.h>
Update: I have road tested my configuration and code and it works exactly as intended. I am very happy with the outcome!
For those who are interested in adding a third mode (perhaps switching more aggressively i.e. at a lower RPM and throttle threshold), the ArbID for the P400/500 mode is 0x315 . Surprisingly the status is not broadcast by the DME, but rather the center console module (SZM).
The status is available on byte[2], which is F1 in hex (241 in dec) when in P400 and FA in hex (250 in dec) when in P500.
Edit: I tried triggering off 0x315 on my car without success. With M-Mode off, it would broadcasting of byte[2] as F2 regardless of the status of the Power button, and would shift to FA when in M-Mode (I assume this means P500s).
This is really strange, as I am expecting to see a third status when in P400 mode.
Any idea?
For those who are interested in adding a third mode (perhaps switching more aggressively i.e. at a lower RPM and throttle threshold), the ArbID for the P400/500 mode is 0x315 . Surprisingly the status is not broadcast by the DME, but rather the center console module (SZM).
The status is available on byte[2], which is F1 in hex (241 in dec) when in P400 and FA in hex (250 in dec) when in P500.
Edit: I tried triggering off 0x315 on my car without success. With M-Mode off, it would broadcasting of byte[2] as F2 regardless of the status of the Power button, and would shift to FA when in M-Mode (I assume this means P500s).
This is really strange, as I am expecting to see a third status when in P400 mode.
Any idea?
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1 Posts
Can you recall where you found it?
This might be of interest: Varex Smart Box | XForce USA
Try instead an ESP32 with dual core cpu, integrated Wifi/Bluetooth and OLED screen. Heltec brand is cheap and OK since it comes with oled but Lolin D32 is a more of a Quality, slightly more powerful and capable chipset with flash memory option.
thank me later. It runs on the arduino platform/IDE as well but wrapped around the Espressif OS system. Its awesome because it just as easy to use and packs tons of power for its size. Especially considering the footprint (size) of the esp32 compared to Arduino Uno/Mega, etc.
Ever since moving to Puerto rico about 2 months ago... i too have been thinking about what can be done With an arduino + bmw but more along the lines of an anti-theft Car tracking device that uses a mobile carrier connection and a small backup battery if car 12v battery is disconnected. Car jackings and thefts are pretty rampant here which is why i start thinking of a potential cheap anti-theft car tracker product
I already built a working unit, which connects to the K-CAN bus, with switching available for M-Mode status, RPM, and throttle. In fact, I have a spare unit for sale - but no one seems interested (not sure why; it's by far one of the best mods I have done on my car).
For Sale: E60/E63 Can Bus Exhaust Controller
Hi all, For sale is a custom designed and built controller that interfaces with the E60/E63's K-Can bus to read the status of the M-Mode, and allows throttle and RPM depended triggering of an exhaust valve. I built this unit while developing my own custom exhaust controller. However, unlike the...
www.m5board.com
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2 Posts
Does anyone have any PT-CAN bus logs in Steptronic manual selection mode?
My idea is to inject manual selection packets into my E66 assuming MS is part of 0x192 packet. On the E66 it's definitely the 0x192 which controls R/N/D electronically.
My idea is to inject manual selection packets into my E66 assuming MS is part of 0x192 packet. On the E66 it's definitely the 0x192 which controls R/N/D electronically.
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9 Posts
Hi Dan, we are currently working on dash oil level display. Did you have the data that the dash uses as well as the CCC unit message?
Hello guys im building a remote start system from scratch and i have a question
if the key is in the slot but not pressed is it possible to send a command via the obd with tool 32,inpa,or insta to trigger the kl15?( ignition on )? i want to capture this signal on the k-can
on ista i have seen this multiple times doing it by itself ( same for ista p )
maybe someone knows and it would really help out
Kind regards
here is the project in works (
)
if the key is in the slot but not pressed is it possible to send a command via the obd with tool 32,inpa,or insta to trigger the kl15?( ignition on )? i want to capture this signal on the k-can
on ista i have seen this multiple times doing it by itself ( same for ista p )
maybe someone knows and it would really help out
Kind regards
here is the project in works (
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