OBD MPGuino gauge

[eimix]

winter is comming, - more free time

I'm going to implement 128x160 graphic lcd display like
1.8" TFT Display tutorial

cheapest (~7$ shipped) i found on ebay
1.8" TFT Color LCD Display Module with SPI interface | eBay

it is going to require >32kb, or some of existing functions will be removed (like currently used lcd), so Arduino mega with 128kb (or other if exist) will be necessary. i saw Arduino mega on Cool Gadgets at the Right Price - Worldwide Free Shipping - DealExtreme for ~23$

also i will try to connect display to car interior light dimmer.

Should i keep updating same version, or should i open different folder in google code trunk?

[Magister]

Originally Posted by eimix

Should i keep updating same version, or should i open different folder in google code trunk?

I think it's better to start a new one like OBDuino128K.pde for instance.

[eimix]

1.8" TFT LCD is working:


After removing old LCD code, and adding new one - size is 28k, so Arduino328 is enough.

To remove old code was easier, then using #define ... #ifdef ...
so i will not put it in current google trunk, but create other after finishing.

[njakts]

That is SICK!!!!!

[Magister]

This is pretty nice

[TurboTorben]

Very nice! This will make it possible to make graphs or graphical instruments showing the data.

TT

[electromike]

That display looks really awesome!
My Graphical Display has been ordered. Awaiting the code to be checked in.

[eimix]

Uploaded source code.

Tried to make it LiquidCrystal LCD and new ST7735 LCD compatible in same project.

New modifications are untested ST7735 part will be tested soon.
I will add wiring schematics too.

[Keeper]

Hello all.
Thank enthusiasts for the idea and implementation.

Question about eimix (my car is also running on gasoline and LPG)

- When a car runs on LPG where are the data?

- Whether in the code to make the transition: the car runs on gasoline - the data are taken from the OBD2, and when the car runs on LPG data are taken from the LPG ECU (or the speed sensor and injector )?
Thanks.

[eimix]

- When a car runs on LPG where are the data?

What data? car running on LPG is same as gasoline - just different mass/volume ratio and different air/fuel ratio - two constants are in *.pde file.

- Whether in the code to make the transition: ...

In "code" car is always running on gasoline or on LPG. No transitions.
Running on gasoline is for such short time - that it does not make big error.

No data from LPG ECU is taken.
Consumption calculation are same, just used different constants.

Injectors time are not used for calculations in gasoline mode, so why they should be used in LPG mode?

In this OBDuino - only speed, rpm, maf or map is used from car ECU via OBD2.