HMs DIY #1-6

Rear derailleur index  ...  the numeric index of the current gear (1, 2, ...)
Rear derailleur max  ...  the number of gears available  (11)
Rear derailleur size  ...  the number of teeth of curr. gear  (32, 28, ...)

I have no DI2 system, but I think your cassette is known by your DI2 system.
(As far as I know you need Shimano D-Fly for transferring ANT+ signals.)

Then.... "Rear derailleur size"   

Yes. D-Fly is required. I have D-Fly.

Thanks

Datafields are now all auto migrated. They should support the new devices now.

Yes, are already running on my 1030 plus! Thanks!

I'm trying to create a compass on my Edge 830. The problem is that the arrow rotates backwards. In my screenshot below you can see that my Track is 271 degrees and the arrow is pointing to the right and not the left. I had to swap East and West to have the compass indicate correctly. The code I used is also pasted below.

Is there a way to have the arrow rotate the opposite direction? Or is there a way to have the compass card rotate with a fixed arrow or lubber line?

<LayoutElement type="3" text="----------------- Compass ------------------"/>
<LayoutElement type="1" color="000000" x="27" y="110" x2="0" y2="0" eletype="DT" valuetype="SN" minval="false" maxonly="false" daynight="true" radius="14" stroke="2" nr_values="1"/>
<LayoutElement type="1" color="000000" x="27" y="110" x2="0" y2="0" eletype="CR" valuetype="FX" minval="false" maxonly="false" daynight="true" radius="16" stroke="2" nr_values="1"/>
<LayoutElement type="0" color="000000" x="27" y="78" fixedtext="true" maxonly="false" daynight="true" eletype="FX" text="N" font="TINY" halignment="1" precision="0" nr_values="1" sampletext=""/>
<LayoutElement type="0" color="000000" x="27" y="123" fixedtext="true" maxonly="false" daynight="true" eletype="FX" text="S" font="TINY" halignment="1" precision="0" nr_values="1" sampletext=""/>
<LayoutElement type="0" color="000000" x="0" y="100" fixedtext="true" maxonly="false" daynight="true" eletype="FX" text="E" font="TINY" halignment="2" precision="0" nr_values="1" sampletext=""/>
<LayoutElement type="0" color="000000" x="43" y="100" fixedtext="true" maxonly="false" daynight="true" eletype="FX" text="W" font="TINY" halignment="2" precision="0" nr_values="1" sampletext=""/>

mcinner: I tried the arrows with the fields North, Track and Heading both with "Alternate Direction of Travel" ON and OFF. It made no difference: when I headed 270 degrees the arrows all pointed to the right and not the left as I would expect.

Also with Edge 830?

For some months now, problems with Edge 830 have been reported for the first time.
A couple of days ago I’ve got the new Edge 1030 Plus which also has a magnetic compass and on first ride I noticed unstable North arrow, too.

I will test and report!

EDIT:
Edge 1030 Plus has not a magnetic compass but an "electronic" compass (see manual).
This compass can be calibrated - but it seems it is not a "real" compass.
God knows how it works. (...or anybody of you out there?)

Ahhh - just looked closer at the layout above...

I think there is a mistake:
Track 270 means, you are heading West. If you‘re heading West, North is on your right side and that is the direction the arrow points to! It shows you where North is. It acts like the needle of a compass. You have to rotate the compass to aligne the needle with the letter N to find your direction. Means: works not with a fixed circle with N always on top!

To be more precise:
Direction arrow and triangle are available:
-North ... arrow points to North
-Start ... arrow points to your starting point
-Coordinate ... arrow points to a given point

What you’ll need is a fourth option: -Track ... arrow points to track-degrees