Member Since: 26 Jan 2012
Location: Rybnik
Posts: 152
I have implemented this on board already(together with GSM modem). Works
16th Jan 2014 10:44 am
alex_pescaru
Member Since: 19 Dec 2010
Location: RO
Posts: 270
Thank you VMatas!
After several requests, I've added on the first post the source codes.
I've used the Microchip's MPLAB environment and compiled with the HiTech C Compiler.
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16th Jan 2014 4:06 pm
Bobs
Member Since: 29 Oct 2013
Location: Manchester
Posts: 2330
Seems very intersting
Would love to know what it all means
Sorry in advance and awaiting the ridicule D4 Front upgrade/cut back wings n things 'taking a long time but getting there'.
D4 rear upgrade - Narpys helped with that bit
Flack for problem solving and D4 Bluetooth Install/ D4 Heated Steering wheel with Flappy paddles n BBS enabling kit
Disco Mikeys work - Serviced, EGR blanking and 4x4 software upgrade, 3 flash indicators.
B.A.S - FBHIC. Uncle Rays spare wheel protector. Beanie Silver Black badges.
Excellent idea - keep up the good work
Discovery 3/4 & RRS keys cut and programmed at your home or work
Apple CarPlay/ Android Auto retro fit - see it here
BAS Remaps/ EGR Blanking
Software updates/ enabling
Mobile Servicing & Repairs
I'm going to try this - will be a bit rough and ready as I can't get a one off board made cheaply.
I have a gsm remote in the garage, which I'm pretty sure will do the switching time on at least Mark.
2006, D3 SE Auto - gone but not forgotten.
2014 BMW 530d M Sport Tourer.
1977 Triumph Spitfire 1500
_________________________________________________
Disco Picture Website Here
17th Jan 2014 8:15 pm
parrafin23
Member Since: 04 Dec 2011
Location: Buskeud
Posts: 681
This is realy nice of you Alex. I remember i asked Bell about this last year here on the forum, i think it was a group buy on these remote fbh he had going. but i cant find it now. The way you have done it is simple and easy to wire up for those who have the knowledge. The parts is easy to get and not expensive. Looking at this in another angle. The keyfob. this sends out a signal on a frequency. the Landrover button sends a code to the reciever in the car. might there be a sollution to make a reciever that uses the same frequency as the keyfob, program the ic to look for the exact code sent by the keyfob when you press the lr button and activate the fbh, one short press activate, 2 short press stop, 3 sec press prime the fbh?
I think if this is possible to do, you only need 12v and gnd to the "box'O'Trix" and a wbus wire to the webasto. The install would be simple task for everyone to do and you do not need to cut in to any wire.
But, there is one small detail that needs to overcome and thats the encryption from the key or is this not relevant Alex?
P.
18th Jan 2014 7:46 am
Narpy
Member Since: 18 Jul 2011
Location: Stockport
Posts: 7830
Not sure if I'm right with this but doesn't the car wake up when you press the Land Rover button??
Presuming it does, how does this device overcome the car having control of the FBH?Mods:
Front Fogs + Halos
FBH Remote Control
The 1st Ever RRS Modded Grill
Garmin Nuvi + D4 Surround + Reversing Camera.
D4 Steering Wheel.
Rear Boot Spoiler.
Twin Brake Lights.
Wing Mirror Indicator Repeaters.
Long Roof Rails
Make your own Narpy grill thread
I'm not scared, I'm outta here.
18th Jan 2014 9:37 am
alex_pescaru
Member Since: 19 Dec 2010
Location: RO
Posts: 270
@parrafin23
I've looked to a as simple as possible solution. Another receiver will complicate things too much.
But this is why I've posted the sources, whoever wants to go further and improve it...
@Narpy
The car indeed wakes up, but this is necessary because the FBH needs to get the engine temperature from the engine ECU in order to know if it'll start or not. As the FBH is on the low speed CAN and the engine is on the high speed CAN and the BCM is the gateway, at least engine ECU, BCM and FBH needs to be awake.
Quote:
Which oscillator / crystal did you use to feed into the pic on your FBH schematic? I see its had an output on pin 5?
It's an integrated crystal oscillator.
18th Jan 2014 2:23 pm
VMatas
Member Since: 26 Jan 2012
Location: Rybnik
Posts: 152
Alex, you sure that FBH asks for temperature PCM? FBH has its own coolant temperature sensor and can start without awaking of other modules - for example using GSM module. I'm sure, that after CAN bus disconnection FBH will operate without any problems using for start W-bus of course.
18th Jan 2014 3:20 pm
alex_pescaru
Member Since: 19 Dec 2010
Location: RO
Posts: 270
Sorry, I meant the ambient/outside air temperature. From what I know the ambient air temperature is wired on the engine ECU.
At least this is how it's on Freelander 2, from inside left mirror wired directly to engine ECU.
You could say more exactly how is it on Disco3....
Sorry...
LE: I am seeing now that the ambient air temperature sensor is on the ATC module. This is also on low speed can. So the ATC should be awake too. Anyhow, back to the original question, yes, some of the car's modules should be awake.
Last edited by alex_pescaru on 18th Jan 2014 4:01 pm. Edited 1 time in total
18th Jan 2014 3:47 pm
VMatas
Member Since: 26 Jan 2012
Location: Rybnik
Posts: 152
By my knowledge of FBH's - i have repaired many of them - it is autonomous device and dont need any info from PCM or other ECU's to operate, excluding case, when FBH is tethered to vehicle and cannot start without communication over CAN bus or W/K-bus, as for example L322 Range Rover. Tethered FBH(mostly Thermotop Z/C) doesn't start via W/K-bus (Webasto software WTT) nor analogous inputs if disconected from vehicle. In Disko 3 TTV is not tethered to vehicle, it can be started via WTT, 1533 timer or your controller using W-bus.
18th Jan 2014 4:00 pm
alex_pescaru
Member Since: 19 Dec 2010
Location: RO
Posts: 270
Yes, the FBH could function in auxiliary heater mode, when driven by the car's CAN bus, and as parking heater mode (as we use them when driven over WBus).
As you know, if you look at the webasto command codes, there is also a different command for starting it in auxiliary heater mode than park heater mode.
But they can function in both modes if the firmware allows.
And on the Freel2, if the exterior temperature is above a certain value, it wont start even if you send start park heater mode. It may be the same case on Disco3. You should know if that's the case...
18th Jan 2014 4:06 pm
VMatas
Member Since: 26 Jan 2012
Location: Rybnik
Posts: 152
By my opinion FBH does not receives START command over CAN bus from Disco side, if ambient temperature is above +5C. I do few times tests with WTT, when temperature was above +5C and FBH started normally.. so it not decides about ambient temperature.
18th Jan 2014 4:15 pm
alex_pescaru
Member Since: 19 Dec 2010
Location: RO
Posts: 270
It may be the case of Disco3, but Freel2 and from what I know the new models, need software/firmware change in order to work in park heater mode.
I've tried with WTT on Freel2 before the firmware update and didn't work. After enabling it with SDD, which meant updating software on engine ECU, TTV and CCF, it worked with WTT.
BUT, still wont work, even with WTT, if the ambient temperature is above 15 deg. Celsius.
So, even if it receives on WBus a start, "someone" on CAN is saying stop.
Works if you disconnect the CAN, but then you loose the supplementary/auxiliary heater mode for assisting engine warm-up.
18th Jan 2014 4:25 pm
VMatas
Member Since: 26 Jan 2012
Location: Rybnik
Posts: 152
Its interesting, seems new firmware works a bit differently. With new vehicles we lose control over ECU's increrasingly..
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