<div dir="ltr"><div dir="ltr">Thanks for the response Greg.<div><br></div><div>I tried what you suggested and it still doesn't turn on. (The 'on/off' is a slider switch rather than a momentary button)</div><div><br></div><div>I also went into Jaycar and tried this simple HUD: <a href="https://www.jaycar.com.au/gps-speedometer-head-up-display-with-obdii-data/p/LA9036?gclid=CjwKCAjwtKmaBhBMEiwAyINuwAF-ZMXvydGdYsUu--w37CmHr6mf1Emx_o2shbA3IvUNUQ4k-ZWtcBoCwQoQAvD_BwE">https://www.jaycar.com.au/gps-speedometer-head-up-display-with-obdii-data/p/LA9036?gclid=CjwKCAjwtKmaBhBMEiwAyINuwAF-ZMXvydGdYsUu--w37CmHr6mf1Emx_o2shbA3IvUNUQ4k-ZWtcBoCwQoQAvD_BwE</a></div><div>Results were the same (didn't have time to find any settings though - as I got permission to try it before I bought it).</div><div><br></div><div>I also confirmed that the cable is wired exactly as specified (no more, no less) including 120ohm resistor.</div><div><br></div><div>I'm starting to think there's an issue with the OVMS board itself!?</div><div><br></div><div>//.ichael</div><div><br></div></div><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, 16 Oct 2022 at 02:09, Greg D. <<a href="mailto:gregd2350@gmail.com">gregd2350@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
Hi Michael,<br>
<br>
Yeah, odd. <br>
<br>
I see in the description that there's a power switch on the side of
the unit, so that will probably interact with the voltage
transition. After turning Ext12v on, and pushing the on/off button
on the HUD unit, I would expect it would turn on. After that,
transitioning Ext12v on/off should trigger the unit to turn on/off
as well.<br>
<br>
Assuming you do get it running, what I would suggest is to create a
pair of Events to force Ext12v on and off when the car state
transitions. For my car, the states are vehicle.on and vehicle.off,
but yours might be different. In the "on" event script I also stop
and restart the obd2ecu process, as that will clear the CAN3 bus
hang that I've experienced. It's a long shot, but perhaps the HUD
isn't turning on because it's not seeing CAN traffic. You might try
the 12v off / ecu stop / ecu start / 12v on sequence manually and
see if that wakes the HUD up.<br>
<blockquote>OVMS# vfs cat /store/events/vehicle.on/myevent<br>
power ext12v off<br>
obdii ecu stop<br>
obdii ecu start can3<br>
power ext12v on<br>
<br>
OVMS# vfs cat /store/events/vehicle.off/myevent<br>
power ext12v off<br>
</blockquote>
Good luck!<br>
<br>
Greg<br>
<br>
<br>
<div>Michael Geddes wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">More information:
<div><br>
<div>I'm definitely getting power on the OVMS -> OBDII
cable. 11 volts when the car is off, and 12.6 volts when
the car is on. I'm assuming this is quite deliberate. (And
like 0.2 volts when the power to the ext12v is off).</div>
<div><br>
</div>
<div>By default, the HUD was needing (according to docs -
probably) 13.2v to trigger it to turn on.. so I connected it
directly to the car OBD and changed that setting to 11.5
volts.</div>
<div><br>
</div>
<div>When I turned the car off (still connected directly)..
the HUD remained on as it was still getting > 12V.. so
the setting definitely worked.</div>
<div><br>
</div>
<div>Unfortunately when I then connected the OVMS to the OBDII
and the OVMS -> OBDII cable to the HUD - it still didn't
turn on. :( (oh and yes - "power ext12v on". </div>
<div><br>
</div>
<div>Any thoughts on this would be welcome.</div>
<div><br>
</div>
<div>//.ichael</div>
<div><br>
</div>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sat, 15 Oct 2022 at 07:15,
Michael Geddes <<a href="mailto:frog@bunyip.wheelycreek.net" target="_blank">frog@bunyip.wheelycreek.net</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">Hi all,<br>
<div>Anybody got any experience with HUDs?</div>
<div><br>
</div>
<div>I bought this simple HUD from FastTech:</div>
<div><a href="https://www.fasttech.com/products/9686283" target="_blank">https://www.fasttech.com/products/9686283</a></div>
<div>When connected direct to the OBDII port, it powers on
and seems to function. When I connect it to the OVMS
module with the standard <a href="https://www.fasttech.com/products/9652027" target="_blank">https://www.fasttech.com/products/9652027</a>
the HUD doesn't even power on.</div>
<div><br>
</div>
<div>It's stated draw is 200ma which afaict should be fine.
I'm pretty sure the 12V power is getting to PIN 16...
though I will try again to make sure. I only have a crappy
little Multimeter.</div>
<div><br>
</div>
<div>On the Troubleshooting it states:</div>
<div> "HUD only available for cars with OBD2 and EU-OBD
agreements ... HUD Products don't support JOBD and OBDI
protocol."</div>
<div><br>
</div>
<div>The OBD HUD connector has the following pins:</div>
<div>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">4*
Chassis</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">5*
Signal Ground</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">6
CAN High</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">7
<b>ISO9141 K Line</b></p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">14
CAN Low</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">15
<b>ISO9141 L Line</b></p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">16
Vehicle Battery
+ve</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">*
Long pins</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent"><br>
</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">These
are the standard OVMS supplied pins:</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">4
Chassis Ground</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">5
Chassis Ground</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">6
CAN H (Primary)</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">14
CAN L (Primary)</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">16
+12V</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">So
obviously the main difference is the lack of K / L lines
in the OVMS ... but I wouldn't have thought that would
have prevented it from powering up.</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">Does
anybody have any thoughts on this?</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">//.ichael</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent"><br>
</p>
</div>
</div>
</blockquote>
</div>
<br>
<fieldset></fieldset>
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</blockquote>
<br>
</div>
</blockquote></div></div>