[BUG] manually adjusting the resistance, incorrect behavior!

[zunfire]

Describe the bug
When manually adjusting the resistance using the app on both Android and iPhone, the behavior is incorrect.

On iPhone, the plus (+) button increases the value from 50 to 150, then to 260.
On Android, the plus (+) button causes similar incorrect jumps in value.
The bike switches resistance levels to 15 and 26.

Open the QZ app.
Connect to bike ID: 10571.
Manually adjust resistance using the plus (+) button.
Observe incorrect behavior in resistance values.

Expected behavior
The resistance should increase as expected when using the manual adjustment buttons.

Device (iPhone & Android models): Debug from iPhone (Android same behavior)
OS (iOS & Android versions): iOS 15.8.3
App Version: 2.17.0

Append a debug log:
debug-tis_feb__4_15_26_34_2025.log

[cagnulein]

you told me that the resistance values shows in qz are *10 is it right? is it true to all the resistance levels?

[zunfire]

Yes, changing the bike resistance on the bike from 1 to 32 results in values ranging from 10 to 320 in QZ, with increments of 10 steps.

Apps like MyWhoosh seem to be able to increment in 10-step intervals as expected, suggesting that the issue might be related to the user interface (UI) behavior in the QZ app maybe..

[cagnulein]

i'm sending a patch for this, i guess the resistance issue also in the write way will be fixed too. if not let enable the resistance instead of the inclination in the bike options Roberto Viola Software engineer and open source enthusiast http://robertoviola.cloud Il giorno mar 4 feb 2025 alle ore 16:14 zunfire ***@***.***> ha scritto:

…

Yes, changing the bike resistance from 1 to 32 results in values ranging from 10 to 320 in QZ, with increments of 10 steps. — Reply to this email directly, view it on GitHub <#3145 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAALYWE4HNAVMCOKVLSCFND2ODKMRAVCNFSM6AAAAABWOY2C2SVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDMMZUGI3TKMRVGY> . You are receiving this because you were assigned.Message ID: ***@***.***>

[cagnulein]

version sent! let me know! Roberto Viola Software engineer and open source enthusiast http://robertoviola.cloud Il giorno mar 4 feb 2025 alle ore 16:36 cagnulein ***@***.***> ha scritto:

…

i'm sending a patch for this, i guess the resistance issue also in the write way will be fixed too. if not let enable the resistance instead of the inclination in the bike options Roberto Viola Software engineer and open source enthusiast http://robertoviola.cloud Il giorno mar 4 feb 2025 alle ore 16:14 zunfire ***@***.***> ha scritto: > Yes, changing the bike resistance from 1 to 32 results in values ranging > from 10 to 320 in QZ, with increments of 10 steps. > > — > Reply to this email directly, view it on GitHub > <#3145 (comment)>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/AAALYWE4HNAVMCOKVLSCFND2ODKMRAVCNFSM6AAAAABWOY2C2SVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDMMZUGI3TKMRVGY> > . > You are receiving this because you were assigned.Message ID: > ***@***.***> >

[zunfire]

Hi,

The resistance values now correctly display from 1 to 32, which is good.

However, there is still an issue with how the levels change when pressing plus (+) or minus (-):
The app does not differentiate between plus (+) and minus (-) the behavior is exactly the same.

When a resistance change button is pressed, the new value jumps towards a specific level X, which seems to be influenced by the ResistOffset setting.

If the bike's resistance value (R) is high, it decreases toward Level X.
If the bike's resistance value (R) is low, it increases toward Level X.
Once it reaches Level X, it remains stuck at that level.

The adjustment steps are not single increments. Instead, the new resistance value appears to behave something like this formula:
NewResistValue = (CurrentResistValue * 0.5) + ResistOffset

I also tried enabling debug logging, but no file was created. Let me know if there’s another way to collect logs for troubleshooting.

Did try "enable the resistance instead of the inclination in the bike options" then i couldent change level at all with the user interface.

[cagnulein]

I need the debug to understand it. Which is the issue with it?

[zunfire]

I couldn't find the folder like the first time, but after restarting the iPhone, it appeared.
Here is the log from the latest test:

ResistOffset set to 5
Bike at resistance 1

Started QZ.
Pressed the Plus button → no change.
Changed bike resistance to 10 on bike.
Pressed the Plus button → resistance drops to 3 on bike.
Pressed the Plus button → resistance drops to 1 on bike.
Pressed the Plus button → no change.

If ResistOffset is set example to 20, the behavior differs.

debug-tis_feb__4_22_08_11_2025.log

[cagnulein]

Ok, I'll check it out. Il giorno mar 4 feb 2025 alle 22:31 zunfire ***@***.***> ha scritto:

…

I couldn't find the folder like the first time, but after restarting the iPhone, it appeared. Here is the log from the latest test: ResistOffset set to 5 Bike resistance 1 Started QZ. Pressed the Plus button → no change. Changed bike resistance to 10. Pressed the Plus button → resistance drops to 3. Pressed the Plus button → resistance drops to 1. Pressed the Plus button → no change. If ResistOffset is set example to 20, the behavior differs. debug-tis_feb__4_22_08_11_2025.log <https://github.com/user-attachments/files/18663697/debug-tis_feb__4_22_08_11_2025.log> — Reply to this email directly, view it on GitHub <#3145 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAALYWBSC255QMTMSCET3Y32OEWSBAVCNFSM6AAAAABWOY2C2SVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDMMZVGEZDAMBVGI> . You are receiving this because you were assigned.Message ID: ***@***.***>

[cagnulein]

ok i guess i found the issue. I would like to try to explain it.

By deafult QZ, for FTMS devices like yours, when you press the resistance plus and minus buttons, it's sending a inclination command because, usually, the FTMS devices are not handling at all a resistance values.

Your device, is sending the actual resistance value, but it doesn't accept the command to set a resistance value (i'm not fully sure about this but since you told me "Did try "enable the resistance instead of the inclination in the bike options" then i couldent change level at all with the user interface." i guess it's so, in case with a log I can check this)

So the only solution is to set an inclination value that could match better an increment of the resistance level.

Could I ask you why you would like to use the resistance tile? Would you like to use QZ standalone for your training sessions?

[zunfire]

I never use QZ as a standalone app but rather as a link between my bike and MyWhoosh to enable automatic resistance adjustments. I think it worked, but I will have to double-check it again now.

Pressing the plus (+) and minus (-) buttons in QZ was just to check if I could manually change the resistance during a session to see if it was possible to adjust the offset value. That’s when I noticed this strange behavior.

[cagnulein]

hah ok so you shouldn't worry about this. using the gears tile with also mywhoosh you can have also virtual gearing on mywhoosh!
let me know!

[zunfire]

It's been a long time since I used QZ, and when I selected it on the iPhone 7 with a small screen, I didn’t notice the gear tile, which was positioned far down by default. It’s working perfectly as intended. Big thanks!

[cagnulein]

thanks for the coffees!