can't control speed and incline on NordicTrack 1750

[SD4US]

I've managed to successfully install QZ companion on my treadmill via ADB script from a Mac. I run the QZ fitness on iOS and it can monitor (receive) speed and incline live from the NordicTrack C1750 (both speed and incline can be controlled via the native iFit app on the treadmill's tablet - I have the sliders enabled too).

However, when I try to adjust speed or incline on the iOS QZ app, nothing changes, not even on the screen of the iOS app. Pressing + or - seem to register but the numbers won't change. Tried many different settings for treadmill type (companion has a 1750 option, but I don't see any difference vs. e.g. when set to "other") & (iOS app doesn't even have a 1750 option at all but I already tried pretty much all available NordicTrack variants with no success)

My plan is to run interval trainings via loading GPX files on the iOS QZ app. According to the description, this should work already:

New Feature: QZ Companion now works with QZ to control the incline of your treadmill (auto-incline), and speed as well (auto-speed), or in the case of a bike, it automatically controls incline and resistance. For example, you can choose to have Zwift control your treadmill or bike incline as you run or cycle through virtual worlds; choose to have QZ make speed (or resistance) and incline changes as you progress through a Zwift workout, or, you can choose to load a GPX file in QZ and have the treadmill or bike follow the incline recorded in the file.

Disclaimer: We have tested this solution on several models of NordicTrack and Pro-Form treadmills and bikes and many are supported now. We began development on a NordicTrack Commercial 2950 (2021 model) treadmill with a built-in 22" touchscreen. Note that this solution should work on any iFit-enabled/iFit-embedded NordicTrack or Pro-Form treadmill or bike with built-in Android tablet.

Many thanks for suggestions and help in advance!

[cagnulein]

Hi @SD4US when you press on the speed plus button, do you see any reaction on the touch screen of the treadmill? Even on a different portion of the screen

[cagnulein]

Ok that's a good news! So run the adb screenshoot script in the installation folder when you are on the manual workout windows in ifit and upload it there so I can handle the coordinates of your touchscreen
Let me know!

[SD4US]

Indeed, almost there!
I tried more model combinations and it looks like QZ on iOS:"Nordictrack T8.5s" + Companion app:"other" (C1750 seems to be not OK) = an almost working combination.
This means that speed adjustment from QZ fitness works! (still have to double check along the full range though) but incline only works approximately level2 and above, any adjustment below 2 or so will just result in a misplaced screen touch.

Attempted running adb-screenshot-mac.sh and it pings the treadmill's IP successfully but then it Cannot establish ADB connection saying:
.../adb-screenshot-mac.sh: line 23: ./adb: No such file or directory

currently I'm trying to figure this out.

[SD4US]

Figured out the screenshots. Attaching 3: a regular one and 2 with sliders placed at end limits.

As mentioned above if I'm using the QZ fitness app on iOS: set to "Nordictrack T8.5s" + the Companion app: set to "other" then the speed adjustment works in the full range (can't tell if it "just" works or precisely mapped but it does seem to work). The incline is definitely not mapped to work with my model (commercial 1750). My incline range is -3.0 to 15 and it seems to work OK between 1.5 to 13.5 and will miss the slider outside of that range (including when it's flat/0



).

[cagnulein]

Wow that's perfect, I will add them asap

[SD4US]

Awesome, thank you!

[cagnulein]

done @SD4US new apk https://github.com/cagnulein/QZCompanionNordictrackTreadmill/releases/download/3.6.3/QZCompanionNordictrackTreadmill.apk

select the new 1750 device in the companion (the one with the -3%)

let me know!

[SD4US]

Super, thank you! I gave it a quick try:
Installed new apk over the old, and selected "C1750 Treadmill (Mph) with -3% Inc." see screenshot.
(Note, that the iOS app is still set to "Nordictrack T8.5s" - no change, the same as before.)

Interestingly, the behavior now appears to match exactly what I had before when selecting "none" in the companion:
incline adjustment only works between 1.5 to 13.5 and will miss the slider below and above that range (clicks somewhere else on screen). One thing seems odd to me, if I set incline on the treadmill to 1.0 as a starting point, then both + and - on the app will set incline to the same -3.0. However, if I start from 1.5, then - adjusts down to 1.0 and + adjusts up to 2.0, both correctly (inclination step is set to 0.5). BTW this was also the same with the earlier setting "other".

Reboot (of treadmill) did not change behavior.

[cagnulein]

@SD4US are you able to generate a debug log from qz for the inclination issue? thanks

[cagnulein]

Ok I guess the issue is the fact that the slider is not linear. I will try to handle this Thanks Roberto Viola Software engineer and open source enthusiast http://robertoviola.cloud Il giorno mer 29 gen 2025 alle 01:46 SD4US ***@***.***> ha scritto:

…

Super, thank you! I gave it a quick try: Installed new apk over the old, and selected "C1750 Treadmill (Mph) with -3% Inc." see screenshot. (Note, that the iOS app is still set to "Nordictrack T8.5s" - no change, the same as before.) Interestingly, the behavior now appears to match exactly what I had before when selecting "none" in the companion: incline adjustment only works between 1.5 to 13.5 and will miss the slider below and above that range (clicks somewhere else on screen). One thing seems odd to me, if I set incline on the treadmill to 1.0 as a starting point, then both + and - on the app will set incline to the same -3.0. However, if I start from 1.5, then - adjusts down to 1.0 and + adjusts up to 2.0, both correctly (inclination step is set to 0.5). BTW this was also the same with the earlier setting "other". Reboot (of treadmill) did not change behavior. ***@***.*** (view on web) <https://github.com/user-attachments/assets/58a95b74-e256-4ac9-94c4-6b6983ca298b> — Reply to this email directly, view it on GitHub <#3081 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAALYWHTVECJHNL45OSIIAD2NAQEZAVCNFSM6AAAAABVY3K3GCVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTCOJZGAZDSNY> . You are receiving this because you commented.Message ID: ***@***.*** com>

[SD4US]

Added debug log in new bug report #3118
Also noticed bug 3092 is pretty much the same issue as mine

This will probably not help much but wanted to document it here (not sure if this is what you meant by non-linear:
Speed (OK) has 11 buttons range 0-12 with 4 & 11 missing but the buttons appear to be equally spaced.
Incline (NOK) has 12 buttons equally spaced, occupying the same vertical screen area as the 11 speed buttons, range is -3.0 to 15 with -2, 1, 3, 6, 9,11,14 missing.

[cagnulein]

Thanks, I'll look into it. Il giorno gio 30 gen 2025 alle 04:26 SD4US ***@***.***> ha scritto:

…

Added debug log in new bug report #3118 <#3118> Also noticed bug 3092 <#3092> is pretty much the same issue as mine This will probably not help much but wanted to document it here (not sure if this is what you meant by non-linear: Speed (OK) has 11 buttons range 0-12 with 4 & 11 missing but the buttons appear to be equally spaced. Incline (NOK) has 12 buttons equally spaced, occupying the same vertical screen area as the 11 speed buttons, range is -3.0 to 15 with -2, 1, 3, 6, 9,11,14 missing. — Reply to this email directly, view it on GitHub <#3081 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAALYWFGUAT4GBMDYPA5YXD2NGLW3AVCNFSM6AAAAABVY3K3GCVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTEMBQGIZTCMQ> . You are receiving this because you commented.Message ID: ***@***.*** com>

[SD4US]

Figured out my treadmill screen. The sliders are indeed fully linear. The preset buttons are not (numbered linearly) but the sliders are.
The screen on my NordicTrack Commercial 1750 is 1280x800. I believe newer ones have a wider screen even though they retain the same model name.

For incline the center of the slider at maximum end 15.0% is (X,Y) (75,212). At minimum end -3.0% it is (75,603). It needs to slide 391/18 pixels per each full unit (that's about 21.7222222).

For speed the center of the slider at maximum end 12.0MPH is (X,Y) (1206,212). At minimum end 0.5MPH (note this is not 0) it is (1206,603). It needs to slide 391/11.5 pixels per each full unit (that's exactly 34).

More numbers in the excel:
Nordictrack commercial 1750.xls

Could you please check whenever you get a chance if a profile combination (companion + QZ app) is supposed to cover these parameters already or not? Thank you!

[SD4US]

Issue has been resolved in related bug report:
#3118
Thank you so much once again!