Looking for input on my DIY Bluetooth gauges

[MotorvateDIY]

TL;DR
With out thinking of cost or difficulty of install, if you could have any gauge(s) in your car, what would you like it to be:
• Oil pressure
• Fuel pressure
• Ethanol content
• Engine coolant temp (to the degree not dots)
• Differential oil temp
• suggest smoothing else!



I guess I have been reading too many post about failing galley gaskets and it got me a little worried. I wanted an oil pressure gauge.

Last year for another project, I had installed an oil pressure sensor in the factory location, so I only needed to do the electrical/wiring part to a gauge.

For those that haven't wired in a gauge, it is not a quick job to get a few wires from the engine bay to the interior. The battery box / windshield cowl needs to be mostly removed and on the inside the glove box needs to be removed. (at least on the G37)

That got me thinking about developing a wireless gauge module and an app that displays the data in realtime on your phone.

Sooooo.... after a month of development, I now have the first prototype of functional "gauges" on my iPhone using Bluetooth.



The Bluetooth module will sit in the engine bay and is powered by a ground and ignition connection.
(right now the module sits on the passenger floor for easy re-programming and voltage checks)

The pressure and/or temperature sensors are wired directly to the module.
Everything will be under the hood... super easy install!

The current version supports up to 8 analog inputs.
My test setup uses a 100 psi sensor in CJM Motorsport's fuel tap, a 150 psi sensor in the engine block and a re-purposed Sentra coolant sensor in the manual transmission and differential to get oil temps.

I have been testing this setup for the last week and overall it works very well. No app crashes or garbled data!! BUT it is a bit of a pain to start the app every time you start the car...

So... I have started looking into a small dash mounted display that would automatically connect and show the live data.


My main reason for doing this was just for my own peace of mind...
BUT is this something that interests you?