[BUG] Mismatch Cadence, power, speed

[juanmre]

Describe the bug
The Cadence and Power received by swift may not be accurate as sometimes im in a 100+ cadence trying to generate 120W power and my feet are bouncing from the pedals. (used an iPhone for the QZ app)

In a fresh install in android to send data to Garmin, I'm seeing mismatching data between what QZ APP displays, what Garmin receives and what Zwift receives... Power and Cadence seem right, but Speed and distance are way off.

Im adding a long exercise from this morning Swift link and Garmin link (both from garmin app) and a third attempt later today only 5 minutes with the QZ .fit file (after joining the beta and finding the file in Android 14). Unfortunately in this last attempt my Garmin lost the power and cadence sensor data.

To Reproduce
Steps to reproduce the behavior:

1. Connect Echelon EX-3 with QZ app in Android
2. Start activity in Garmin, connect Power and Spd/Cadence sensors
3. Open Zwift, connect power, cadence and speed sensors
4. Start a ride (without ERG option in QZ app)

If repeated without Garmin and with ERG enabled selecting a Zwift training, it will be hard to keep the power because pedals resistance is not enoug and feet will be bouncing.

Expected behavior
In the first attempt, Zwift ride and no ERG, Zwift screen seems reasonable but speed recorded by Garmin will be excessive...
In the second exercise, Zwift training with ERG, is hard to keep up with the power because pedal resistance is not enough

Screenshots
Sharing my setup an some off-data shown

Desktop (please complete the following information):

Smartphone (please complete the following information):

• OS: Android 14, Samsung A35 5G
• QZ app: 2.16.52 (joined Beta)
• Ipad os 17.4.1. Zwift 1.63.0
• Garmin Epix Pro SW 16.22

Append a debug log

Follow this guide https://github.com/cagnulein/qdomyos-zwift/wiki/How-do-i-get-the-debug-log-in-case-something-doesn't-work%3F

Will add debug file in next excercise session..
Mon Apr 29 11_56_51 2024.fit.zip

5 min recent exercises (both links from Garmin) Power, cadence and speed disconnected from Garmin

• Zwift 3.32km distance, reasonable: Check out my virtual ride activity on Garmin Connect. [#beatyesterday] (https://connect.garmin.com/modern/activity/15139149502)
• Garmin 9.01km distance, not real: Check out my indoor cycling activity on Garmin Connect. #beatyesterday

Earlier 45 min activity (from the .Fit file attached)

• Zwift, 18.12 km distance, reasonable: Check out my virtual ride activity on Garmin Connect. #beatyesterday
• Garmin 78.07 km distance, not real: Check out my indoor cycling activity on Garmin Connect. #beatyesterday

Additional context
Feel free to request any more data that could help

[cagnulein]

first of all read this, https://robertoviola.cloud/2024/01/27/dispelling-the-myth-speed-variations-between-qz-and-zwift-are-not-a-device-issue/ garmin and qz must match if the wheel diameter is set to 100mm on the garmin. does it? Roberto Viola Software engineer and open source enthusiast http://robertoviola.cloud Il giorno lun 29 apr 2024 alle 20:51 juanmre ***@***.***> ha scritto:

…

Assigned #2313 <#2313> to @cagnulein <https://github.com/cagnulein>. — Reply to this email directly, view it on GitHub <#2313 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAALYWERZI2HVTMIGA62QO3Y72JDNAVCNFSM6AAAAABG63WHM2VHI2DSMVQWIX3LMV45UABCJFZXG5LFIV3GK3TUJZXXI2LGNFRWC5DJN5XDWMJSGY2DONRUGQ4DKOI> . You are receiving this because you were assigned.Message ID: ***@***.***>

[juanmre]

Hi, thanks for your attention... hold on, I'm thinking I may need to calibrate the speed sensor in my Garmin... let me look in to it and get back to you here...

thanks!

[cagnulein]

yeah just set the wheel diameter to 100mm and you are good to go also enable the speed based on power setting in the bike setting in qz in order to have a similar speed to zwift as referenced in the link i'm going to bed soon Roberto Viola Software engineer and open source enthusiast http://robertoviola.cloud Il giorno lun 29 apr 2024 alle 20:59 juanmre ***@***.***> ha scritto:

…

Hi, thanks for your attention... hold on, I'm thinking I may need to calibrate the speed sensor in my Garmin... let me look in to it and get back to you here... thanks! — Reply to this email directly, view it on GitHub <#2313 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAALYWGUCY6OPNZ4SKLTZHTY72KBVAVCNFSM6AAAAABG63WHM2VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDAOBTGQ2TCMBXGQ> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[cagnulein]

@juanmre are we OK with this?