Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18560
Just a nugget of info that may help, it looks like the Si9243 K-line transceiver chip is going out of production. The L9637D from ST Microelectronics is 100% pin compatible 06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
Any issues with the site let me know!
30th Dec 2014 5:27 pm
alex_pescaru
Member Since: 19 Dec 2010
Location: RO
Posts: 270
Thanks for the update!
Or, alternatively, you can use any LIN bus driver available.
30th Dec 2014 5:34 pm
Martin Site Admin and Owner
Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18560
I have also managed to compile Alex's code with the Microchip XC8 compiler and have successfully used a 20MHz crystal with the relevant code change 06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
Any issues with the site let me know!
30th Dec 2014 5:54 pm
gucio1983
Member Since: 30 Dec 2014
Location: Warsaw
Posts: 14
Thanks. Nice to know. I'm building portable diesel heater using Sebastopol thermo top v as heat source. Yours webasto controller is brilliant:) I'm going to finish it as soon as possible.
30th Dec 2014 5:58 pm
discostick
Member Since: 08 Nov 2012
Location: Kent
Posts: 316
I have been tweaking my controller some more over christmas.
A new feature i have added is the LED and its control logic.
Now there are two options for the remotely mounted LED.
1. The LED flashes when the heater is running under control of the module. When you turn the ignition on, the LED goes off. I did this for mounting the LED in the front Grille, so the LED doesnt annoy drivers.
2. The LED can also be put into a new monitoring mode. In this mode, the LED flashes when the heater is running under control of the module as before. But if the ignition is turned on, the LED will continue to flash until the module stops the heater. Then it continues to monitor the heater while the engine is on, if the cars can-bus starts the heater, the LED comes back on (solid not flashing).
Its been interesting to have the LED on the dash in this mode and see when the heater is running and what has control of it. It was surprising how often the car ran the heater in the recent cold spell.
With the controller set to temperature limit, you can see the heater stop once it gets to > 75c. Then if you have the heating whacked up, the car re-starts the heater etc. I have also noticed that you dont need to have the HVAC set to AUTO for the car to start the heater, i thought i had read somewhere before that you did?...
I have now fitted the ones i promised to friends and family's cars, also a couple of members on here.
I have a spare complete module with loom and remote mounted LED. Il put it in the for sale section tomorrow.
4th Jan 2015 12:03 am
DiscoJake
Member Since: 23 Aug 2013
Location: Hereford
Posts: 1429
Or, alternatively, you can use any LIN bus driver available.
Here's my latest contribution after Alex's good share spurred some action from me.
Also in answer to your PM (harrythespider) here is photo of my latest board using pic16f1829lin chip.
This has everything on board e.g lin driver chip and seems very stable using on board osc. It's only the size of a 10p piece and is triggered as before using headlamp/ignition_on or as I've done the t80 transmitter unit, only because I already had one, but any tr/rx unit that gives an output can be used. I bought a load of pcb's from china and adapted them for this project but soldering the ssop pic16f1829lin chips on is not for the faint hearted. Top marks Discostick for your beautiful unit.
I have put comments on software, which is Alex's just rejigged for this chip. In the the spirit of this post I'ii make them available, or for anyone that doesn't feel able to build their own I have some spare boards but would have to order some parts in PM me.
Update...tided/commented wbus.c up, have added 2 more items, heater pump running led output and jumper to select 30/15 mins time option.
enjoy.Best ever LR110
Discovery II
RR Sport
IIDTool BT
Last edited by tobouk on 14th Jan 2015 1:27 pm. Edited 8 times in total
6th Jan 2015 7:21 pm
harrythespider
Member Since: 21 Oct 2008
Location: cumbria
Posts: 290
Work of art
6th Jan 2015 10:09 pm
alex_pescaru
Member Since: 19 Dec 2010
Location: RO
Posts: 270
NICE!!!!!
I didn't know about this particular microcontroller with a LIN transceiver inside.
Just one chip - as the chip has an internal 5V voltage regulator that can power the microcontroller - and a few pasives and you're good to go!!
Even cheaper!
Nice find!
6th Jan 2015 10:26 pm
discostick
Member Since: 08 Nov 2012
Location: Kent
Posts: 316
I like it !!! Nice work.
6th Jan 2015 10:29 pm
gruodiz
Member Since: 16 Nov 2011
Location: Klaipeda
Posts: 294
Simple and nice
6th Jan 2015 10:35 pm
alex_pescaru
Member Since: 19 Dec 2010
Location: RO
Posts: 270
tobouk wrote:
I have not put comments on software yet, which is Alex's just rejigged for this chip, or done drawing. In the the spirit of this post I'ii make them available, or for anyone that doesn't feel able to build their own I have some spare boards but would have to order some parts in.
Please do so, even a picture after a hand drawing is OK.
And if you post the sources too, then, maybe, you'll encourage others to experiment!
Again, nice turn this thread has got - look how nice, simple, easy and beautiful the initial idea has been transformed into.
And this because some passionate people hasn't stopped to experiment!
Thank you very much!
Request..... has anyone got can bus address for fbh and fan controller.
ThanksBest ever LR110
Discovery II
RR Sport
IIDTool BT
9th Jan 2015 4:24 am
manu_LRD3
Member Since: 09 Jan 2015
Location: Torino
Posts: 8
Grat job!
I'm very glad to see such a clever and smart person as you, about the FBH control, I don't have the capabilities to do it my self. can you help me? alex_pescaru
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