Joycon EXR Steering Wheel Control for Android
Thread Starter
Intermediate
Joined: Sep 2012
Posts: 27
Likes: 0
Joycon EXR Steering Wheel Control for Android
All,
I've recently installed a Nexus 7 into the dash of my 2013 427 vert. I'm trying to retain the steering wheel controls and have purchased and installed a Joycon EXR. after some tweaking and adding a few 10k ohm resisters I got everything working.... yah! Well... not so fast. Everything works as long as the car is running. As soon as I turn the car off it appears the change in voltage causes the joycon to miss the triggers.
link to a short video to better explane....
Has anyone successfully used one of these and if so how should I connect it to get a more consistent result? Thought this was going to be the easy part of the install.
I've recently installed a Nexus 7 into the dash of my 2013 427 vert. I'm trying to retain the steering wheel controls and have purchased and installed a Joycon EXR. after some tweaking and adding a few 10k ohm resisters I got everything working.... yah! Well... not so fast. Everything works as long as the car is running. As soon as I turn the car off it appears the change in voltage causes the joycon to miss the triggers.
link to a short video to better explane....
Has anyone successfully used one of these and if so how should I connect it to get a more consistent result? Thought this was going to be the easy part of the install.
Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
I have a high output alternator in my car, in the '07 I was having issues with the SWI programming while driving so I reprogrammed the buttons with the car running, problem solved while driving (originally programmed SWI with car off).
You could try programming the SWI with the car off (or on, the opposite of what you did before), maybe you'll get lucky.
You could try programming the SWI with the car off (or on, the opposite of what you did before), maybe you'll get lucky.
Thread Starter
Intermediate
Joined: Sep 2012
Posts: 27
Likes: 0
Thanks for the reply. As you'll see in the video this is exactly what I did. After driving for a few days it has been very hit and miss if it even works while running. I've been watching the battery voltage and it works fine at 14.4 but if the electrical load increases (volume turned up) the voltage drops to 13.8-14.1 and the joycon starts to miss its triggers.
Very frustrating!!
I'm going to try to add a step down voltage device to 3.3v to see if that will help stabilize the system.
Very frustrating!!
I'm going to try to add a step down voltage device to 3.3v to see if that will help stabilize the system.
Instructor
Joined: Apr 2013
Posts: 180
Likes: 2
From: Charlotte NC
Kseiter, can you explain what you had to do to get the joy con to work? I'm trying to get one to work with my parrot asteroid smart on my 2013 but I can't get the joycon setup. When I press a steering wheel button the joycon shows the red line moving way to the right but all buttons look the same. I'm assuming that adding resistors fixed this for you? If so how many did you need and is it as simple as putting them inline in series on the white wire to the joy con?
Instructor
Joined: Apr 2013
Posts: 180
Likes: 2
From: Charlotte NC
An update, I got it working in my car, I was an idiot and wired it up wrong. Pretty hard to do considering it's two wires... Anyway, hooked it up correctly and it's working. I have the volume up, volume down, back button, home button, psuedo mute (just repeats volume down for a second).
So far, I haven't had any issues with it not synching up when the car is off. I set it up with the car in Accessory mode and it works fine in accessory mode and when the car is running.
So far, I haven't had any issues with it not synching up when the car is off. I set it up with the car in Accessory mode and it works fine in accessory mode and when the car is running.
Thread Starter
Intermediate
Joined: Sep 2012
Posts: 27
Likes: 0
An update, I got it working in my car, I was an idiot and wired it up wrong. Pretty hard to do considering it's two wires... Anyway, hooked it up correctly and it's working. I have the volume up, volume down, back button, home button, psuedo mute (just repeats volume down for a second).
So far, I haven't had any issues with it not synching up when the car is off. I set it up with the car in Accessory mode and it works fine in accessory mode and when the car is running.
So far, I haven't had any issues with it not synching up when the car is off. I set it up with the car in Accessory mode and it works fine in accessory mode and when the car is running.
Thanks!
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
Thread Starter
Intermediate
Joined: Sep 2012
Posts: 27
Likes: 0
The DAC is the key for the audio. It converts the digital usb audio to analog RCA.
Here's the link to the wiki.
http://rootzwiki.com/topic/37755-tim...ent-usb-audio/
Download page for the rom.
http://mehrvarz.github.io/nexus-7-usbrom/
This is the DAC I'm using
Heel & Toe
Joined: Jul 2013
Posts: 19
Likes: 0
I see, thanks. For mine, I have the ability to connect direct to my systems audio processor via Bluetooth. A new feature on the Rockford processor. You can also select inputs and eq profiles for your various inputs via remote dial switches. I haven't tried the Bluetooth and am uncertain of the quality just yet, so may have to consider dac solutions too.
I am intrigued to be able to easily tie my htc one or 7" T-Mobile springboard into the system, the potential cool things we can do are interesting to think about. Specially with 4g LTE capability!
I am intrigued to be able to easily tie my htc one or 7" T-Mobile springboard into the system, the potential cool things we can do are interesting to think about. Specially with 4g LTE capability!
Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
You could try a voltage regulator chip like THIS ONE
Thread Starter
Intermediate
Joined: Sep 2012
Posts: 27
Likes: 0
The issue is the voltage swing. The developer of the product suggested the 10k ohm resisters to help stabilize the voltage. Initially I had the issue listed where all swi buttons would max out the joycon. After adding the resisters I get different resistance from each button which is the desired and correct behavior. The issue is the varying voltage causing the trigger points to move around to the point whatever they no manger meet the target threshold.
The developer indicated that their should be no voltage from the swi wire and to isolate the source and cut it. I've heard of people making it work properly without and would just like to understand the solution so I can replicate it.
Thanks for the replies.
Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
Resistors in a DC circuit will drop the voltage seen at the other components in the circuit with them, but the voltage drop is proportional based on the resistor value as a % of the total circuit resistance. If voltage fluctuates, with a resistor installed it will just fluctuate at a lower value.
The chip that I linked to is a voltage regulator. If you install it on the line that puts power into the steering wheel buttons the voltage will stay constant at 12vdc (assuming the source never drops below 12v, which it shouldn't). You MAY have to also use it as the supply to the SWI itself, but I don't think so.
That would solve your problems
The chip that I linked to is a voltage regulator. If you install it on the line that puts power into the steering wheel buttons the voltage will stay constant at 12vdc (assuming the source never drops below 12v, which it shouldn't). You MAY have to also use it as the supply to the SWI itself, but I don't think so.
That would solve your problems
Instructor
Joined: Apr 2013
Posts: 180
Likes: 2
From: Charlotte NC
I connected the A6 pin from the steering wheel to the joycon ground, and the A7 to the joycon. The A6 pin didn't have a connection on the Pac plug so I moved an unused pin (illumination maybe?) to the A6 spot. That way I didn't have to modify the factory wires. Next time I have the radio out I'll try to get pics.