Exploring ideas on external gear indicator

ky0u · 10-23-2020, 03:17 PM

Hello, had a slight project possibility I wanted need a bit of guidance on, hoping some brains on this forum can help me out

I was wondering if it was possible to rig up a tiny screen (as in 1" x 2") to create a secondary gear indicator light that mirrors the one in our dash cluster.
I have an auto so this would need to read out P/R/N/D/S/1-6

I researched a bit on Arduino stuff but a lot of the information assumes a 'from scratch' approach where you'd need to create the input signal. But since our cars already have that exact functionality from factory, I was trying to figure out if it was possible to just piggy back off it to output to the second screen

solo118 · 10-25-2020, 10:01 AM

If you just get XHP transmission tune, it will indicate the gear while in D mode. I am not 100% sure, but I also think this can be done by coding.

ky0u · 10-26-2020, 10:22 AM

Quote:

Originally Posted by solo118

If you just get XHP transmission tune, it will indicate the gear while in D mode. I am not 100% sure, but I also think this can be done by coding.

Yes I'm aware, I already run the XHP tune. My intent here is to run a secondary screen readout

ewicky · 10-27-2020, 01:06 PM

You probably want to setup the Arduino as a CAN bus sniffer, because, as you say, the car already knows which gear its in.

starfox5194 · 10-27-2020, 01:49 PM

yes. or comma ai has a panda can obd reader and some great software to go with it.

10-23-2020, 03:17 PM	#1
ky0u Captain 1067 Rep 944 Posts Drives: e92 335i, f22 m235i, e30 325is Join Date: Sep 2010 Location: San Diego iTrader: (1) Garage List 2015 BMW M235i [0.00] 1988 BMW 325IS [0.00] 2007 BMW 335i [0.00]	Exploring ideas on external gear indicator Hello, had a slight project possibility I wanted need a bit of guidance on, hoping some brains on this forum can help me out I was wondering if it was possible to rig up a tiny screen (as in 1" x 2") to create a secondary gear indicator light that mirrors the one in our dash cluster. I have an auto so this would need to read out P/R/N/D/S/1-6 I researched a bit on Arduino stuff but a lot of the information assumes a 'from scratch' approach where you'd need to create the input signal. But since our cars already have that exact functionality from factory, I was trying to figure out if it was possible to just piggy back off it to output to the second screen
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10-25-2020, 10:01 AM	#2
solo118 Second Lieutenant 36 Rep 206 Posts Drives: '11 335i Coupe Join Date: Jun 2013 Location: NYC iTrader: (1)	If you just get XHP transmission tune, it will indicate the gear while in D mode. I am not 100% sure, but I also think this can be done by coding.
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10-27-2020, 01:06 PM	#4
ewicky Lieutenant 204 Rep 525 Posts Drives: '07 335xi 4D AT Join Date: Jan 2017 Location: Seattle, WA iTrader: (0)	You probably want to setup the Arduino as a CAN bus sniffer, because, as you say, the car already knows which gear its in.
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10-27-2020, 01:49 PM	#5
starfox5194 Private 19 Rep 50 Posts Drives: 2007 E90 335i Join Date: Aug 2020 Location: Connecticut iTrader: (0)	yes. or comma ai has a panda can obd reader and some great software to go with it.
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