Constantin: monitor effort drift against your session average

[Łukasz Szmigiel]

@Speed-Man can you explain a little bit more? What are you experiencing?

[Speed Man]

@Łukasz-Szmigiel This morning I went for a run, but the Constantin app didn’t display my heart rate or speed on the screen. I checked it again just now, and it seems to be working normally now.

[Łukasz Szmigiel]

@Speed-Man this is because the initial aggregation of data necessary for the graphs to display starts when the Constantin screen is displayed for the first time.

After it has been displayed at last once - it continues to collect the data so the graphs are fresh even when outside of the app. It is a good practice to cycle screens after the workout starts so that it can initialise.

Also keep in mind that the graphs are flushed after navigation panel settings change (route / poi load / unload) or when the S+ are loaded / unloaded.

This is not ideal but allowed for making the app way smaller and lighter so that three displays can be merged into one and well… It doesn’t crash.

[Speed Man]

@Łukasz-Szmigiel Thank you. I’ll try using it now.

[Łukasz Szmigiel]

Constantin 2.31

FYI: The update may not yet be public in the apizone.

Charts now use minute averages, expanding from a 5-minute to a 10-minute and then a 15-minute window. Nine vertical levels make the trends steadier, while a wider green line helps distinguish overlapping pace and heart-rate trends.

Charts refresh roughly every four seconds, with numeric values updating every two seconds. I also simplified the calculations and screen layout to reduce overhead.

Initial testing suggests the chart survives longer when used alongside route navigation. This is encouraging, though longer testing is still needed to confirm reliability.

Full details, the changelog and an interactive demo are available at constantin.szmigiel.design.

[Łukasz Szmigiel]

Constantin 2.32 fixes an unintended regression in 2.31: the chart’s endpoint was showing an averaged value rather than what was happening now.

The endpoint now represents the latest pace, NGP or speed delta and heart-rate delta, updating roughly every four seconds. The four earlier points remain averaged and cover consecutive intervals, giving 4, 8 or 12 minutes of history plus “now”.

Full details, the changelog and an updated interactive demo are available at constantin.szmigiel.design.

[Łukasz Szmigiel]

Good news everyone! It seems that I’ve finally found a way to have a history in main.js that survives the UI unload and no-crash experience. I’m currently testing this version.

[Łukasz Szmigiel]

Constantin 3.00 — the Carduelis release

Constantin 3.00 is out. The main change: you now decide what “steady” means, and that choice directly shapes the trend chart.

Where to set it. Open Constantin’s settings in the Suunto app. There are two sliders: Steady heart rate range (2–9 bpm, default 4) and Steady pace and speed range (1–10% of your average, default 3%). Changes apply the next time the Constantin screen loads, e.g. at the start of your next workout.

What it does to the chart: a minimum scale for steady running. The chart has nine levels, four above and four below your current drift. Your range sets the smallest step between levels, so the chart can never zoom in further than four ranges either way. With the default 4 bpm that’s ±16 bpm: a heart-rate point stays on the line within 0–3 bpm, moves one level at 4–7 bpm, two at 8–11 bpm, and so on. For pace at an average of 6:00/km, 3% is 11 s/km, so a point moves one level only once it’s 11 s/km away. This is what matters when you’re running steady: small fluctuations inside your range keep the line flat, and every step means a real change of at least that size.

Beyond that, the scale is still dynamic. Once any point drifts further than four ranges from now (more than 16 bpm with the default), the chart widens to fit the largest difference, and each step becomes bigger than your range. Example: with a 4 bpm range, a point 24 bpm away puts the scale at ±24 bpm, so one level is 6 bpm. So during intervals, hills or a big fade, you still see the whole shape on screen; the range only stops the chart from blowing up tiny changes when things are calm.

Same range for the status. The STABLE label uses the same numbers: a delta smaller than your range is STABLE; from the range upward it reads HIGH/LOW for heart rate or AHEAD/FADE for pace.

How to choose. Go tighter (e.g. 2–3 bpm, 2%) to see every small change on steady tempo runs or long easy efforts. Go wider (e.g. 6–9 bpm, 5%) if you only care about bigger shifts. Pace and speed use a percentage, so the setting means the same at any pace and in slower sports like hiking.

Also new in 3.0: the chart now survives screen changes. When route navigation starts or stops, or another SuuntoPlus app is switched, the full chart comes back in about 15 seconds, and history keeps collecting while Constantin is hidden.

[Łukasz Szmigiel]

Hi everyone,

Could someone with a Suunto Vertical 2 or Race 2 share the full filename of the latest firmware package stored on their watch? Ideally version 2.56.28.

I’m looking for the complete .sof filename, including the build number and the identifier at the end, rather than just the software version shown in About. I need it to find a direct download link and download the firmware to my computer.

To check the package name:

1. Open Settings → General → About.
2. Scroll down to Data privacy.
3. Press and hold the lower button until the service/debug menu appears. This may take around 12–20 seconds.
4. Open Select OTA pkg.
5. Take a photo of the package names or copy the full filename, and mention whether your watch is a Vertical 2 or Race 2.

Please only view the list. Don’t select a package to install, and don’t use “Delete OTA pkgs”, as it removes the cached firmware packages. Once you have the filename, leave the menu.

A photo is fine if the filename is too long to copy.

Thanks!

[Mff73]

@Łukasz-Szmigiel
I just have 2.56.18,sorry
https://firmware.geo.movescount.com/production/Xiamen-fw_2.56.18.31896-V-a8f49e99.sof

[Łukasz Szmigiel]

@Mff73 thanks, It’ll be helpful!

[Lazar Dimitrov]

@Łukasz-Szmigiel
Here’s the one for Race 2 - 2.56.28

https://firmware.geo.movescount.com/production/Wismar-fw_2.56.28.33260-U-5bfd6226.sof