So I built a few canbus/car electronic projects… anyone got ideas for more?

[Gripless]

Have made some esp32 gauges and displays for my car.

does anyone want something like this or have any suggestions?

 

All these are setup over wifi with webpage to enter settings. It’s pretty basic so far but could add presets to auto configure for different generations.

 

Tire pressure over Bluetooth round display that you turn outer ring to see different pressure units, and push to turn off display. It comes back on for new alerts etc. Can add sensor ID and working on a discovery feature. I theory the 2012 or newer cars could have this canbus the data to the OEM screen. The older cars have a physical wire to the dash lamp.

 

RPM bar display 16-40 led F1 style. Has rpm limits and flash rate etc settings. Currently only canbus but could do pulse counting so works with older rpm signal.

 

DCCD display. Currently no settings just smart watch screen that can show auto with +- manual and the diff lock level. Graphics need a lot of work.

 

canbus keypad. There is a opencan version online so could be auto configured by most aftermarket ecu brands. Or web page where set canbus id and then ecu can receive messages when buttons are pressed. Could also receive messages from ecu to turn on/off illumination behind keys, or set colour.

 

could retrofit a LCD to old cluster so can display more data as well as the check lights so stays WOF compliant.

Edited April 25 by Gripless
Retrofit idea

[Gripless]

Early version of TPMS testing layout and colouring. Currently the magenta lines are grey and text is white unless alarm then red or orange.

 

Screen is 1.3” and outside is about 52mm 

similar size to 08 aircon dials.

Thinking 3 will fit across a single DIN stereo panel size, so could have TPMS, G force sensor and something else.

[Gripless]

Working on prototype 2 for shiftlight.

Prototype 1 was a bench top proof of concept and was just wires with alligator clippers connecting everything.

This one is fully cased with OBD2 connector, and buttons to activate wifi for settings and turn off display etc.

There are 3 options on how to connect the display and sensor to the control box, and where the button(s) are. This one is 3 buttons in the back of the led bar. 

[Gripless]

Tested and working.

25x225mm with 40 led

17x182mm with 32 led 

 

options to set via wifi

redline

flash warning after redline

flash rate/speed

minimum rpm to turn on eg off until 3000rpm. Rescales led so still uses al of them.

pattern. Single line, inside to out, outside to in.

colour palette 

 

thinking of adding canbus id via wifi so can be any ID, plus can send messages from aftermarket ecu telling it how many LEDs to turn on. That way a table or math block in ecu can control it.

[Gripless]

Made a few little changes and fixes.

• better canbus ID filtering
• imcreased processing speed
• watchdog timer that reboots if no can rpm data for 10 seconds
• Small memory leak found that caused issues after 4-5 hours at 2000 packets a second.
• added tiny 1cm wide OLED screen for status information. 

Looks like prototype 2 will be viable for use.

 

The only remaining  issue is triggering the power on and off, but that could be all software sleep.

 

After that is for other people to try it and get feedback 

[Andy_Mac]

Something rectangle that sits in the top 1/3rd of the vents would be cool, like a P3 gauge but with more specialised info available. Having DCCD there would be cool 

[Gripless]

Only sti specific stuff I know of is DCCD and G-force sensors.

 

working on some PCB design bits and updating to use the newer canbus chips.

 

Adding a thermocouple circuit as a test and they cost way to much.

[Gripless]

Well ordered the first circuit boards for prototype 4.

 

WTF cost was USD10 shipped for 10 custom boards.

 

It is insane what you can fit into a tiny space.

The board is 20x76mm and max 5mm high with all these features:

 

• fuse, self resetting
• short-circuit aka reverse polarity protection 
• 12/24v switch mode power supply for low heat 90% efficiency 
• Just need to swap the protection diode and fuse for use in 24v vehicles
• Optional ign switch input to power up
• Electrical noise filtering
• Spare 5v and 3v3 volt outputs
• 4x static (ESD)protection for buttons and knobs etc
• 12 general purpose input/outputs
• Current generation CAN 2.0 controller with listen real listen only mode. 
• CAN bus noise filtering, ESD and voltage spike (TVS) protection
• optional canbus termination for aftermarket ecu 2nd bus use.
• ESP32 module with dual core cpu, wifi and Bluetooth 
• connector for firmware update and Arduino IDE supported

This is massive overkill and parts are high spec low tolerance ones.

board can run as almost anything, supports full LCD displays etc. 

 

 

Adding web configuration for colour of each led and rpm it triggers at.

You can set can ID and bytes via web to look at so supports most cars and aftermarket ecus. 

Also want to add an aftermarket mode that allows ecu to do some cool things that I have seen any other product do.