LCD Gauge Update #3: 35 Data Items on 16 Pages!
 

Unfortunately, I didn't keep everything to one thread :(
Here is my attempt to fix this, incase you want to follow from the start

First thread:
Jan 28/2022, DIY Mini-Dash LCD Gauges Update:
http://www.the370z.com/engine-drivet...es-update.html

Second thread:
Feb 16/2022, DIY Mini-Dash LCD Gauges Update #2 - New Layout & Multiple Screens!
http://www.the370z.com/engine-drivet...e-screens.html



I am pleased to report some MORE excellent progress on the mini-dash LCD gauges!

This version shows 35 unique data items (see full list below video link), on 16 different pages, that are meaningful for the 370 enthusiast.
To change the displayed page, just push the cruise on/off button twice within 1.5 seconds. Super easy!
Also, when your headlights turn on and the dash dims, so does the gauge back light. No illumination wiring needed!

Once the snow clears, the next video will show the gauge operation while going for a drive in the country.



Full list of available data items:
Data items from the "Bluetooth Sensor Server" and additional sensors:
• Engine oil pressure
• Fuel pressure
• Manual transmission oil temperature
• Differential oil temperature
• up to 4 additional temperature, pressure or even ethanol sensors.

From the car's network (CAN bus)
• ECT: Engine coolant temperature
• EOT: Engine oil temperature
• EOP: Engine oil pressure
• AFR B1: Air/fuel ratio bank 1
• AFR B2: Air/fuel ratio bank 2
• Individual wheel speed
• MAF 1: Mass air flow, bank 1
• MAF 2: Mass air flow, bank 2
• IAT: Intake air temperature
• MAP: Intake manifold pressure (aka boost sensor)
• TB 1: Throttle body absolute position bank 1
• TB 2: Throttle body absolute position bank 2
• APP: Accelerator pedal position
• IGN: Cylinder #1 ignition timing
• TORQ: Engine torque
• HP: Calculated HP (from engine torque & engine RPM)
• AWD: Front wheel torque. 0% = RWD only, 100% = fully AWD and 50/50 torque split
• SIDE g: Lateral acceleration
• STRG: Steering wheel angle
• TOT: Automatic transmission fluid temp
• IN RPM: Automatic transmission input shaft RPM
• OUT RPM: Automatic transmission output shaft RPM
• GEAR: Automatic transmission current gear (1-7)
• Automatic transmission torque converter status: Locked or Sliding
• BRAKE PSI: Brake line pressure
• BARO: Outside air pressure
• OUT TEMP: Outside air temp
• CRUISE: Cruise control set speed
• RAD FAN: Rad fan duty cycle. 0% = off, 100% = full speed
• VOLTS: System voltage
• CFM: Calculated, real time engine air flow in cubic feet per minute. Uses intake air temperature and outside air pressure to calculate intake manifold air density and uses the total mass air flow to calculate actual engine air flow.

it might be nice to have all this in a single thread.
a thread is like a history of a project. spreading it all over multiple threads isn't so great.

You can always edit the main post of a thread with your updates. :twocents:

aside from that
this project looks amazing. I want one! Excited to see what the final graphics end up looking like. And the enclosure options.

This is really nifty. Not sure if you've checked this out yet, but the raspberry pi 7" touch screen fits very nicely in the cubby hole. If I could find a way to cleanly cover up the holes where the hinges go in and out, this would be a great second screen. My head unit also has HDMI input, so might just utilize that but not sure yet if audio will work while viewing HDMI.

*edit* was trying to figure out why that air vent didn't look right - you have a g37 so the above may be useless info :)

Not at all! The 370z and G37 CAN bus is very similar and I am working to support both.

How long does you pi take to boot up?

It would be pretty cool as a replacement for the 370z left circle display.

You could even make the graphics looks like that old screen.
And since you have the data you could replace the fuel bar and temp bar with higher resolution bars on your screen. Maybe make it easily removable if the user has to access the original lcd for some reason.

http://www.the370z.com/members/z_you...auge-black.jpg

Just cover this right up and put a much more useful display there.
I would definitely buy one.

with a display like this maybe?
https://www.szmaclight.com/product/R...-mipi-RGB.html

that would be the definition of OEM plus. and unobtrusive upgrade.

Thanks for the input. I though about adding it to the existing thread, but was worried it would be deeply buried and not seen by new thread viewers.
The thread views is one of a few factors I use to determine what platform (G, Z or Q) I should focus on. If that is a problem, I have no issue moving the thread.

i think it would be nice to see it progress in a single thread over time. much easier to track the project that way.

Thanks for this suggestion! I really like that idea.

370 gauge clusters are expensive at more than $220 Canadian. I can get a G37 cluster for about $50 at the local scrap yard... I guess that is the "Z tax" :)

To start, I like the idea of something external (that doesn't look like an add-on) that I can use to test/prove the durability of the hardware and software in different operating conditions. If something does fail or act weird, it is an easy replacement.

Once the durability is proven, I will buy a 370 cluster and see how this could work.
If you have any other suggestions, please keep them coming :)

OK.
How do I do that? I didn't see anything under "Thread Tools"

i don't think you need a 370z gauge cluster to test this. Just needs to be the proper diameter circle to fit over the lcd screen. I can measure mine. And since i'm near you if you want to test a fit you can test it on mine. I have some 3d printers here to make a mounting plate maybe if that would help (once i figure out how to use them).

If you covered the entire area of the circle in the cluster you'd have to reimplement the status leds in software (do you have all that data via can?)

or the screen could just cover the inner portion and leave the status leds outer ring visible.

as for the thread thing. there's nothing to do. just post your updates in this thread as new posts. everytime a new post happens the thread rises to the top so it won't get lost.

If you want to update the first post with detail you just click the edit button on it.

usually people will keep the original content of the first post and put their edits either on top or on bottom. you can link to other posts with updates kind of like a table of contents.

also it might be nice to find the other threads you made and add links to them in the first post. so people following this thread know that there are other (buried) thread related to the project.

also i don't think many people view forums by "new thread" it's usually by new posts. at least for daily consumption. that's why there's a new posts button. (that's what i imagine most people use on this forum). so whenever you add a new post your thread will rise to the top for people to read the update. (basically how forums have always worked. I've been following some threads for years and year on this and other forums. splitting it into multiple thread makes things much harder to follow)

I have 3 of these clusters at the house and they sure are expensive. From taking them apart I can't see a passive way to install, almost 90% sure printing it would be the only option.

What I do envision is this going in the center storage (where non navi install their tablets)

This LCD gauge will be a hot item for sure!

When you mentioned this, I was thinking about removing the factory LCD screen and replace it with a LCD screen driven by my hardware. I think that would look great, but would make for a tricky DIY install, depending on the the cluster is assembled.

I will keep this in mind, but for now, I need to stay focused on continued testing of the gauges/hardware on my car. I want to make sure the platform is rock solid so others don't have any issues.

Also, tomorrow I will update the thread like you mentioned. :)

I'd replace my 4 gauges with Frank's screen and install it in the cubby area again

I'd need to know a bit more about the project to be sure it's even feasible, but a pi3 can fastboot in about 2-3 seconds. I guess I assumed based on the form factor that is what you were using here to run the front end display, but I need to go back and read your other posts.

For your gauges, is this correct?
• Boost
• Oil Pressure
• Oil Temp
• Air/Fuel ratio
• Ethanol content

Are they all standalone gauges & sensors?