Custom lettering on radio display??

[Chet]

Perfect then, i should be able sort you out with a plug module that will display the battery voltage. You'd just have to connect a wire to 12v.

 

[DannyR]

Interested in this but unsure what I'd want to display!

 

[Chet]

I'm the relative short term all i can offer is static text or battery voltage. Other stuff is a way off yet

 

[Ezra-RS]

And when is it displayed? Can it be switched between, voltage when radio off and just the normal radio display with the radio on?

 

[Chet]

Not right now, thats much more complicated. I only said about making the voltage one as i was asked. At the minute if you use the standard display or stalk i can't do anything.

Bare in mind i just started playing with this the other day and i need to pull my radio out and carry my laptop and everything out to the car to work on it so i haven't really spent much time on it.

 

[olly.BENN]

Something I forgot to ask, can I use the stalk if I wanted a voltage reading?

 

[Chet]

No, not as it stands but like i said above, i've only just started playing with this.

I assume you have an adapter then?

 

[olly.BENN]

Little black box thingy??

haha gotta love the technical terms.

 

[Chet]

Does your tiddly finger flick behind your rotating car pointer make your wireless music machine change?

 

[olly.BENN]

No, lmao, I got the kit "without the digital display" so it doesn't actually fit my car.

learnt my lesson no to "brief read" things.

 

[Chet]

So you're not using the stalk??

 

[olly.BENN]

Not right now but I want to when I get the right kit

 

[Chet]

Right, ok

 

[Matt@codered]

Would it be able to display lambda readings? From the car I mean, not a separate source...

 

[Ezra-RS]

Not right now, thats much more complicated. I only said about making the voltage one as i was asked. At the minute if you use the standard display or stalk i can't do anything.

Bare in mind i just started playing with this the other day and i need to pull my radio out and carry my laptop and everything out to the car to work on it so i haven't really spent much time on it.

Yes, so in the early stages.. That's okay, it's cool that you're doing this. I'll keep an eye on this thread!

 

[Chet]

Would it be able to display lambda readings? From the car I mean, not a separate source...

Should be able to read both lambda yeah.

 

[The Fatty]

I started some work on this a while ago (used a ELM327 connected to a PIC12F), got it outputting to an aftermarket lcd screen, but then realised that the idea was pointless. I realised I was better off saving myself the hassle and just used a ELM327 Bluetooth device (about £10) with Torque on my phone. The internal screen can only display limited data due to its char limitation.

 

[Chet]

I started with an LCD too. I have Torque aswell but thats missing the point of doing it this way. You could argue that having a PC connected is better than Torque!

 

[ThomasBrentnall]

Are you using Arduino with this by any chance? Looking good so far

 

[Chet]

Yeah so far i've been using an arduino.

 

[Bert.C]

I've managed to read off a few values, I can't get oil temp I don't think.

I'm working reading the stalk commands so you could use them for control but I haven't got anywhere yet.

I have the standard radio so the most important thing for me is to keep that working along side this which is another thing I haven't figured out!

Iirc the stalk works using a matrix of the switches, not over serial. There's a thread on another forum with the schematic.

Would like to hear how your displaying the text etc using an arduino (via PM if you don't want to tell everyone how you've done it)

 

[ThomasBrentnall]

Iirc the stalk works using a matrix of the switches, not over serial. There's a thread on another forum with the schematic.

Would like to hear how your displaying the text etc using an arduino (via PM if you don't want to tell everyone how you've done it)

I would like to hear as well if you don't mind

Tom

EDIT: Are you using a ELM327 as well?


EDIT again:

Someone has actually written a library for this, and the coding seems pretty simple.

Sourceforge code: http://sourceforge.net/projects/obdcon

Example:

void loop(){
int value;
// read The engine RPM into 'value'
if (obd.ReadSensor(PID_RPM, value)) {
// light on LED on Arduino board when the RPM exceeds 5000
digitalWrite(13, value > 5000 ? HIGH : LOW);
}
}

 

[Chet]

I'll be posting all the details once i have enough information that i'm sure of.

Any link to the stalk schematic?

 

[Bert.C]

Colours are colours of wires at connector apparently and this is from a Renault 19 but I dare say it will be similar?

And s5 is the wheel and acts as a rotary encoder.

 

[Chet]

Ah ok, the clio II ones are different. Thats useful to have if i decide to do anything with my 19

 

[Clarkey]

This is epic!
How many characters are available on the screen?

 

[Chet]

8 main characters and then the smaller one normally used for the station preset number.

There also seems to be the facility for scrolling text but I haven't figured that out yet.

 

[davo172]

Amazing !!!:approve:

 

[Chet]

Another video. This is very rough and ready. Some of the values are badly formatted (no decimal point) and some are simply parsed wrong from the ECU and some give useless values (engine load is either 0 or 100%)

 

[BoatNonce]

It's a private video

 

[Chet]

Try now, it was set to private while i was adding the captions

 

[ThomasBrentnall]

works now

 

[BoatNonce]

Looks great!

 

[Matt@codered]

Brill!!! Loving this. Is there a way of recording and logging it?

 

[jesus]

I have no idea how you're doing that, or how accurate it is, but you are bloody clever!

 

[mad pierre]

Very cool Chet, Guess the Meg 1's are the same.

 

[Tunst]

No idea how this all works haha, oil temp would be a good one though!

 

[ThomasBrentnall]

Brill!!! Loving this. Is there a way of recording and logging it?

There is. I'm working on making a data logger for a raspberry pi soon as my elm327 arrives! (tomorrow or wednesday)

 

[Jack!]

Might be a really stupid question, but is there or will there ever be a way to display track information in scrolling text, rather than track 1, track 2 etc, while retaining the standard headunit? I know you can do it with an Alpine headunit (from research) but I hate aftermarket headunits.

 

[Chet]

Neither the internal nor charger players pass the title so nope.

This should work on anything with a tuner list head unit. I will probably be looking for guinea pigs to test in the future.

Data logging can be done but it's not something I'll be doing with this. The problem with data logging is that the more you're reading from the ecu the slower your update speeds are. Some of the cheapie ebay readers can only read about 8 times per second. So if you're trying to log all variables you could have a case where you're only updating each variable once every 2 seconds which is useless for things like rpm and throttle position. Even selectively picking the update frequency for different sensors still leaves you with some lag.