ChrisEV
Posts: 55
Joined: Tue Nov 14, 2017 3:47 pm
Location: GTA, Canada

Re: Remote fob range extension?

Mon Nov 20, 2017 7:07 pm

RobbW wrote:Has anyone managed to find a hack to extend the usable range of the remote? Or any method for initiating the pre-cool/heat process without using the remote (e.g. cellular hack, networked EVSE, etc.)?

I finally, Finally, FINALLY got my work to install a Chargepoint EVSE. This will be my first winter being able to charge while at work, and I'm very excited. Well, I *was* excited until I realized that the distance from my office building to the Chargepoint EVSE is too far for the iMiEV remote to work. So, I currently am unable to trigger the climate preconditioning via the remote. So, I will be able to leave work at the end of the day with a fully charge battery (Yea!), but I won't be able to preheat my car in the winter (Boo!).

I was just wondering if anyone has found a way to activate climate preconditioning when the remote is too far away? Is there any way to send a signal via a networked Chargepoint EVSE? Or to hook up a cellphone in the car somehow that could relay the signal? Or any way to boost the signal on the remote?

Thanks!


Considering how expensive those remotes are I’m not sure I’d risk it :)

Seems easier to leave the remote in the car and make some sort of gizmo to push the remote buttons for preheat at a set time. Although that’s hardly trivial.
2012 i-MIEV SE Premium

Don
Site Moderator
Posts: 2754
Joined: Thu May 10, 2012 3:55 pm
Location: Biloxi MS

Re: Remote fob range extension?

Tue Nov 21, 2017 9:06 am

RobbW wrote:1). Would this be safe to do in the iMiEV's remote? Or would I risk frying sensitive electronics that could cost hundreds of dollars to replace?
Yes, you would definitely be risking frying something. Hard to predict what would happen
2). Would doubling the power really increase the range of my remote?
Adding transmit power would increase the range a bit, but nowhere near doubling it. You might get an extra 15 or 20% at best I would guess. There are many factors which determine the effective range of any device
http://www.electronicdesign.com/communi ... lculations
3). Would this also increase the remote's sensitivity to receiving signals *from* the iMiEV? Or does this only increase the transmission range of the remote?
No, the received signals from the car wouldn't improve any . . . . unless you doubled the voltage of the car's transmitter. Better antennas in both the car and the remote would make the greatest change

If you can plug in the car at work and leave for home with a full pack, using MAX heat for 5 or 10 minutes when you first start the trip home should get you comfy enough that you probably needn't worry too much about preheating it

Don
2012 iMiEV SE Premium, White
2012 iMiEV SE, White
2017 Chevy Volt Premier
2014 Ford Transit Connect XLT SWB wagon, 14,000 miles
1979 Honda CBX six into six

ed5000
Posts: 146
Joined: Mon Jul 27, 2015 9:22 pm
Location: Castro Valley, CA

Re: Remote fob range extension?

Tue Nov 21, 2017 10:19 am

I would try hanging 4 to 8 feet of wire on the wall and clipping or holding your remote antenna to that while using it. It might be especially effective if you can put the wire in front of a window facing toward you car. How much building is there between you and the garage?
2012 ES, Cool Metalic Silver, no quick charge, no fog lights and no navi but a cold weather package for when it gets 13 below, wait - it never gets that cold here.
"Silver Shadow"

Aerowhatt
Gold Member
Posts: 426
Joined: Wed Jan 28, 2015 1:52 pm

Re: Remote fob range extension?

Tue Nov 21, 2017 10:37 am

RobbW wrote:Opening the remote for the iMiEV, I see that it uses (2) 3V CR2032 batteries. So, it is already powered with 6V. If you replaced the (2) CR2032 batteries in the iMiEV's remote with (4) CR2016 batteries, it would effectively double the power to 12V. Two questions:

1). Would this be safe to do in the iMiEV's remote? Or would I risk frying sensitive electronics that could cost hundreds of dollars to replace?
2). Would doubling the power really increase the range of my remote?
3). Would this also increase the remote's sensitivity to receiving signals *from* the iMiEV? Or does this only increase the transmission range of the remote?


This is a type of "overclocking" and a risky business. It's as likely to just damage the electronics as anything. Plus as you noticed it's a two way communication and the overclocking will not effect the remotes ability to receive a confirmation signal.

It's really the car that has a better chance of increasing the remote control range. A better antenna on the car would increase communication distance both directions. Same with the remote an additional antenna for it. With most radio devices you can boost the range without doing any hacking whatsoever, just buy extending the antenna's ability to send and receive weak signals. That said the signals both directions decrease in strength as the square of the distance between them. So the most that can be hoped for with better antennas is doubling the range or less.

WiFi repeater devices do a decent job of extending range. Something similar (but in the right frequency range) could easily triple or quadruple the remotes range. The rub is that you would need one at each end of the required range (more or less). I would research the antenna improvement angle and pursue that avenue as a first choice.

Aerowhatt
2014 cool silver ES, acquired new 4/2015 (42.7ah at ~26K miles)
2014 Labrador Black Pearl ES, acquired new 3/2016 (41.5ah at ~15k miles)

Return to “Modifications & Accessories”