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Any general discussion around the firmware, what is does, how it does it etc.
By Thaniel
#40943
Hello Everyone. First of Great job on this software. I've downloaded the source code for the firmware and have been looking through it and playing with it a bit on a bench setup. (ordered a couple speeduino boards to play with too) Anyway, very impressed with the work done here. And impressed with the people on this forum. Hope that at some point I can contribute to the work in some way.

About me. My son and I have done quite a bit with cars and Arduino's over the last 8 or so years. Typical kind of things, ipod to car integrations, cam and crank pulse simulators, EEPROM chip readers etc. But most of our time was spent with CAN bus. If there is any help that I could do there let me know.

Anyway my question, and sorry if I'm asking in the wrong place, is in regards to A/C request and control. My brother is using a speeduino on his Miata. And he asked if I could look at some issues he was having with triggering the A/C and getting the idle up to all happen at the right times etc. It appears to me a small A/C controller as part of the speeduino code would work well. I found some code posted sometime in the looked to be an A/C control section but I don't see anything in the released code (perhaps it was just suggested code). Before I go trying to add in some custom code for him thought I'd ask if I'm missing something in regards to the best way to do A/C control.

Thanks for any tips you can provide.

Thaniel
By dazq
#40945
Hello and welcome!

There is a simple idle up option whereby a input pin just raises the idle by a preset amount , but it is pretty simple.
Yes I recall the more detailed setup you refer to , it was not merged into the main code.

With regards to the canbus integration , it is work in progress , it is a quite complex thing to add covering the different platforms we potentially use. I will be submitting a further pr to add the OBD2 style port for teensy MCU for the next month's firmware release all things to plan , with the mega extension following later.
#40975
dazq wrote:
Fri Feb 14, 2020 7:39 pm
There is a simple idle up option whereby a input pin just raises the idle by a preset amount , but it is pretty simple.
Yes I recall the more detailed setup you refer to , it was not merged into the main code.
Thanks for verifying. Won't be wasting my time writing up something. The idle up is working but we would like to tie it to the A/C request with some logic. I'll see if I can edit up the code and get something to work.
dazq wrote:
Fri Feb 14, 2020 7:39 pm
With regards to the canbus integration , it is work in progress , it is a quite complex thing to add covering the different platforms we potentially use. I will be submitting a further pr to add the OBD2 style port for teensy MCU for the next month's firmware release all things to plan , with the mega extension following later.
Yes there is some very particular timings required for CAN bus, even once the messages are being passed correctly. Getting the messages formatted and the timing between the messages accurate enough that a car thinks it's coming from the OEM ECU can be very time sensitive. It will be interesting to see what is developed for the speeduino. Having CAN input and output can make things much easier to integrate into a vehicle with CAN bus.
#40980
Thaniel wrote:
Mon Feb 17, 2020 1:51 am
Thanks for verifying. Won't be wasting my time writing up something. The idle up is working but we would like to tie it to the A/C request with some logic. I'll see if I can edit up the code and get something to work.
There is no need for this?

Just have the activation of AC connected to the idle up input.
By Thaniel
#40983
theonewithin wrote:
Mon Feb 17, 2020 10:08 am
Thaniel wrote:
Mon Feb 17, 2020 1:51 am
Thanks for verifying. Won't be wasting my time writing up something. The idle up is working but we would like to tie it to the A/C request with some logic. I'll see if I can edit up the code and get something to work.
There is no need for this?

Just have the activation of AC connected to the idle up input.
That is how it is currently wired, and the car stalls before the idle up has managed to effect a higher idle. Apparently the AC engages quickly and the idle up acts a little slower. A little press in the throttle when pushing the AC button keeps it from stalling when the AC is first engaged, but that is not very refined. And not good for letting others drive the car.

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