Send Watts / Cadence / Speed to my Garmin EPIX Watch

[marpie]

Hi there,

I got a new Bike (Merach S26) which is detected as a MRK-S26S by the QZ app on my iPhone 16. But I cannot add the QZ sensor on my Garmin EPIX 2 watch.

The sensor is found by the watch, but when selecting it to connect, it just hangs while connecting. I also compiled the app on a Raspberry Pi, but this yields the same issue. A sensor is detected when I search it on the watch, but no connection … I have a spare XIAOMI Redmi 12C Android phone, but that does not have ANT+.

Is there a way to connect the Speed / Cadence / Watts sensor with my Garmin so while training the data is saved by the watch?

Hardware

• Phone: iPhone 16 or XIAOMI Redmi 12C
• Watch: Garmin EPIX 2
• Raspberry Pi: Raspberry Pi Zero 2 W

I also have an ANT+ USB Sensor, but I did not find anything related to ANT+ in the RPI code that was referenced.

[cagnulein]

On garmin you need to do this from ant+ on android or raspberry. For the raspberry enable the garmin compatibility from the garmin options in qz Let me know Roberto Viola Software engineer and open source enthusiast http://robertoviola.cloud Il giorno dom 6 apr 2025 alle 15:12 Markus Piéton ***@***.***> ha scritto:

…

Hi there, I got a new Bike (Merach S26) which is detected as a MRK-S26S by the QZ app on my iPhone 16. But I cannot add the QZ sensor on my Garmin EPIX 2 watch. The sensor is found by the watch, but when selecting it to connect, it just hangs while connecting. I also compiled the app on a Raspberry Pi, but this yields the same issue. A sensor is detected when I search it on the watch, but no connection … I have a spare XIAOMI Redmi 12C Android phone, but that does not have ANT+. Is there a way to connect the Speed / Cadence / Watts sensor with my Garmin so while training the data is saved by the watch? — Reply to this email directly, view it on GitHub <#3364>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAALYWGYNFBTZ2MVZFG5NBD2YER5VAVCNFSM6AAAAAB2RWJJTSVHI2DSMVQWIX3LMV43ERDJONRXK43TNFXW4OZYGE3TCNRSHA> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[marpie]

Hi Roberto,

can I do this from the raspberry headless? Because I don't have a GUI on the RPI as it is so low-powered.

I couldn't find anything in the command line options for this or do I need to create a profile file?

[marpie]

OK, so I set the following values in .config/Roberto Viola/qDomyos-Zwift.conf:

[General]
ant_garmin=true
antbike=true
battery_service=true
bluetooth_lastdevice_name=MRK-S26S-0CA5
bluetooth_no_reconnection=false
bluetooth_relaxed=true
garmin_bluetooth_compatibility=true
power_sensor_name=BIKE

The Garmin watch sees the QZPI sensor as a Speed/TF sensor, but the connection cannot be completed.

Edit: only with bluetooth_relaxed=true the Bike will be recognized.

The following command line was used: ./qdomyos-zwift-no-gui -battery-service -bike-cadence-sensor (compiled from the master branch)

[cagnulein]

Remove ant_garmin and antbike and power_sensor_name Roberto Viola Software engineer and open source enthusiast http://robertoviola.cloud Il giorno dom 6 apr 2025 alle 17:49 Markus Piéton ***@***.***> ha scritto:

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OK, so I set the following values in .config/Roberto Viola/qDomyos-Zwift.conf: [General]ant_garmin=trueantbike=truebattery_service=truebluetooth_lastdevice_name=MRK-S26S-0CA5bluetooth_no_reconnection=falsebluetooth_relaxed=falsegarmin_bluetooth_compatibility=truepower_sensor_name=BIKE The Garmin watch sees the QZPI sensor as a Speed/TF sensor, but the connection cannot be completed. — Reply to this email directly, view it on GitHub <#3364 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAALYWELMKNQTKA6YJS2ZO32YFEKLAVCNFSM6AAAAAB2RWJJTSVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTENZUGE4DMOA> . You are receiving this because you commented.Message ID: ***@***.*** com>

[marpie]

OK, removed the three properties, but the result seems to be the same.

This is my current settings file:

[General]
app_opening=5
battery_service=true
bike_cadence_sensor=true
bike_power_sensor=false
bike_wheel_revs=false
bluetooth_lastdevice_address=24:00:0C:A0:FC:EB
bluetooth_lastdevice_name=MRK-S26S-0CA5
bluetooth_no_reconnection=false
bluetooth_relaxed=true
ergDataPoints="47|81|1;61|106|1;59|102|1;40|69|1;51|88|1;49|85|1;27|46|1;44|76|1;45|78|1;42|73|1;46|79|1;25|43|1;57|99|1;62|107|1;55|95|1;30|53|1;32|56|1;31|54|1;28|49|1;26|46|1;29|51|1;22|39|1;33|58|1;24|42|1;"
garmin_bluetooth_compatibility=true
horizon_treadmill_7_8=false
horizon_treadmill_force_ftms=false
miles_unit=false
nordictrack_10_treadmill=false
power_sensor_as_treadmill=false
power_sensor_name=Disabled
reebok_fr30_treadmill=false
run_cadence_sensor=false
service_changed=false
virtual_device_bluetooth=true
zwift_click=false
zwift_play=false
zwift_play_emulator=false

I tried with the following two command lines:

• ./qdomyos-zwift -no-gui -bike-cadence-sensor
• ./qdomyos-zwift -no-gui -battery-service -bike-cadence-sensor -bluetooth_relaxed

I logged the command output: log.txt

[cagnulein]

I got the issue, I didn't handle for raspberry. I will do it ASAP Roberto Viola Software engineer and open source enthusiast http://robertoviola.cloud Il giorno dom 6 apr 2025 alle 20:08 Markus Piéton ***@***.***> ha scritto:

…

OK, removed the three properties, but the result seems to be the same. This is my current settings file: [General]�����������������������������������������������������������������������������������������������������������app_opening=5battery_service=truebike_cadence_sensor=true��������������������������������������������������������������������������������������������bike_power_sensor=falsebike_wheel_revs=falsebluetooth_lastdevice_address=24:00:0C:A0:FC:EB����������������������������������������������������������������������bluetooth_lastdevice_name=MRK-S26S-0CA5bluetooth_no_reconnection=falsebluetooth_relaxed=true����������������������������������������������������������������������������������������������ergDataPoints="47|81|1;61|106|1;59|102|1;40|69|1;51|88|1;49|85|1;27|46|1;44|76|1;45|78|1;42|73|1;46|79|1;25|43|1;57|99|1;62|107|1;55|95|1;30|53|1;32|56|1;31|54|1;28|49|1;26|46|1;29|51|1;22|39|1;33|58|1;24|42|1;"���������������������garmin_bluetooth_compatibility=truehorizon_treadmill_7_8=falsehorizon_treadmill_force_ftms=falsemiles_unit=falsenordictrack_10_treadmill=falsepower_sensor_as_treadmill=falsepower_sensor_name=Disabledreebok_fr30_treadmill=falserun_cadence_sensor=falseservice_changed=falsevirtual_device_bluetooth=truezwift_click=falsezwift_play=falsezwift_play_emulator=false I tried with the following two command lines: - ./qdomyos-zwift -no-gui -bike-cadence-sensor - ./qdomyos-zwift -no-gui -battery-service -bike-cadence-sensor -bluetooth_relaxed I logged the command output: log.txt <https://github.com/user-attachments/files/19622751/log.txt> — Reply to this email directly, view it on GitHub <#3364 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAALYWABRWRQK4NJDFQTG632YFUSRAVCNFSM6AAAAAB2RWJJTSVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTENZUGI3TIMI> . You are receiving this because you commented.Message ID: ***@***.*** com>

[cagnulein]

@marpie i created this PR for you #3366
could you please check and report back? I didn't test myself. Let me know

[marpie]

Using the build: https://github.com/cagnulein/qdomyos-zwift/actions/runs/14307614898/job/40094946021, I copied the artifact https://github.com/cagnulein/qdomyos-zwift/actions/runs/14307614898/artifacts/2894707950 to my pi and executed using the following command line:

./qdomyos-zwift-32bit -no-gui -no-heart-service -bike-power-sensor -bike-cadance-sensor -bike-wheel-revs -bluetooth_relaxed 2>&1 | tee /root/log.txt

The file was located in the <git-dir>/src/ directory. The sensor is advertised, but no connection was established.

This is the log: 20250407-log.txt

The Garmin mode seems to be activated, but it seems to not work. Is there any more information I can provide, so the debugging gets easier for you?

[cagnulein]

thanks, since i can't have access right now to my raspberry pi, could you please show me how nrfconnect app on mobile see the raspberry? i'm interested particularly in the 2a63 characteristic (read the value while you are riding from the nrfconnect app). Thanks Roberto Viola Software engineer and open source enthusiast http://robertoviola.cloud Il giorno lun 7 apr 2025 alle ore 19:16 Markus Piéton < ***@***.***> ha scritto:

…

Using the build: https://github.com/cagnulein/qdomyos-zwift/actions/runs/14307614898/job/40094946021, I copied the artifact https://github.com/cagnulein/qdomyos-zwift/actions/runs/14307614898/artifacts/2894707950 to my pi and executed using the following command line: ./qdomyos-zwift-32bit -no-gui -no-heart-service -bike-power-sensor -bike-cadance-sensor -bike-wheel-revs -bluetooth_relaxed 2>&1 | tee /root/log.txt The file was located in the <git-dir>/src/ directory. The sensor is advertised, but no connection was established. This is the log: 20250407-log.txt <https://github.com/user-attachments/files/19636472/20250407-log.txt> The Garmin mode seems to be activated, but it seems to not work. Is there any more information I can provide, so the debugging gets easier for you? — Reply to this email directly, view it on GitHub <#3364 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAALYWBB2C556BI2DHTWKWT2YKXGXAVCNFSM6AAAAAB2RWJJTSVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTENZVGQYTINA> . You are receiving this because you commented.Message ID: ***@***.*** com>

[marpie]

Thank you very much. I tried a few different things, but nothing worked so far, so I truly appreciate your help.

[cagnulein]

I didn't have find time to test it. Hopefully in the next weeks
I will let you know

[marpie]

Just to make sure I got an old Samsung Galaxy J5 (unfortunately without wifi), but Bluetooth is working and I got the power and speed sensor sucessfully connected to the Garmin EPIX watch. So generelly QZ is working with my watch.

Now I need to figure out how to get the app running continuously. It just exits after 10 minutes or so and Android shows "qz was aborted"

[cagnulein]

@marpie Create an android bug report and I will check it!

[marpie]

I now think it is not a “real” crash, but an app-triggered close as it seems it wants to open a web page, but as Wi-Fi is not working, it fails. It tries to open your Patreon page (https://www.patreon.com/bePatron?u=45290147).

Is there a way to just “buy” the app and copy it via ADB, as Wi-Fi is not working on the phone?

[cagnulein]

Yes it's because it's a trial! Subscribe to patreon on that page and use your patreon email in qz to unlock it any devices! Roberto Viola Software engineer and open source enthusiast http://robertoviola.cloud Il giorno mer 23 apr 2025 alle 09:00 Markus Piéton ***@***.***> ha scritto:

…

I now think it is not a “real” crash, but an app-triggered close as it seems it wants to open a web page, but as Wi-Fi is not working, it fails. It tries to open your Patreon page ( https://www.patreon.com/bePatron?u=45290147). Is there a way to just “buy” the app and copy it via ADB, as Wi-Fi is not working on the phone? — Reply to this email directly, view it on GitHub <#3364 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAALYWAU4L4ED7KW36GI36T2243BBAVCNFSM6AAAAAB2RWJJTSVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTEOJRHEYTKOA> . You are receiving this because you commented.Message ID: ***@***.*** com>

[marpie]

OK, which subscription do I need? And where do I input it in the app? I subscribed in Patron this weekend.

[marpie]

I added my e-mail in the general settings field, but the phone has no Internet as the wifi is not working.

[cagnulein]

Unfortunately without the play store you need at least a internet connection to verify the subscription Roberto Viola Software engineer and open source enthusiast http://robertoviola.cloud Il giorno mer 23 apr 2025 alle 15:34 Markus Piéton ***@***.***> ha scritto:

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I added my e-mail in the general settings field, but the phone has no Internet as the wifi is not working. — Reply to this email directly, view it on GitHub <#3364 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAALYWDLDQT4ETCFXT5RH3L226JGFAVCNFSM6AAAAAB2RWJJTSVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTEOJSGMZDEOI> . You are receiving this because you commented.Message ID: ***@***.*** com>