@SyncBypass Perfect, thank you!

@SuuntoPartnerTeam Thanks. Exactly what I have expected.

@guderaber There is no way to sync images. Also no information to share regarding limitations either, I’m afraid !

@Martin-Lillepuu Exactly, and also keep the custom watchfaces (once available) for personal use without going through the bureaucratic hoops of publishing them to official store.

@Horizontal_2 I’ve used waypoints that I’ve added on the route for this purpose. This only works if you have the the route so a separate app might be a good idea anyway. I might take a look at this!

I have previously shared my implementation of a structured interval guide. [image: 1781683549257-interval_recover.jpg] As it was not possible to upload FIT files to the watch I decided to implement the setup of a structured interval run on the watch like this. [image: 1781683569172-combined_setup.jpg] Three different interval profiles are stored on the watch. Initial defaults are: 2 x 12 min @ 101% of LT pace 5 x 6 min @ 107% of LT pace 10 x 1 min @ 113% of LT pace The user can change repetitions, interval duration and pace. The new settings will be saved in the profile for the next interval run. Speed zones are retrieved from the watch and used to set LT pace and reasonable pace for warm-up, recovery and cool-down. Recovery duration is set to match interval duration with a lower and upper limit. The watch did not support creating four separate SetUp screens for the UI. So one screen was used in combination with setText for the label and parameter being changed. To avoid problems with rounding effects in Suunto firmware, pace (seconds per kilometer) was used in main.js which was converted to speed (m/s) only when output.

One thing that caused my grief when working with subscribed signals (HR, pace) in main.js or in onLoad is that on the simulator signals are always available. On the watch subscribed signals seem to transition from ‘undefined’ -> ‘NaN’ -> a valid number. I ended up needing to protect any use of these signals by using isFinite(), like this. // Get the index of the the active zone for a 5 zone HR gauge // v current value // zones an array of 4-values defining the 5 zones function getActiveZone(v, zones) { if (!isFinite(v)) return 0; for (var i = 1; i < zones.length; i++) { if (v < zones[i]) return i - 1; } return zones.length - 1; } Inserting systemEvent() was quite effective in pinpointing the point of failure once I understood how to do it. But I do not really get any error message, just something like this. [MR] messages are inserted by me, so I can see something happened after “G4a”, but not what the actual error was. #3251371 26.05.2026 17:44:39 : EVT UI_FRAMEWORK : JS [MR] G1 #3251372 26.05.2026 17:44:39 : EVT UI_FRAMEWORK : JS [MR] G2 #3251373 26.05.2026 17:44:39 : EVT UI_FRAMEWORK : JS [MR] G3 #3251374 26.05.2026 17:44:39 : EVT UI_FRAMEWORK : JS [MR] G4a1-not-supported #3251375 26.05.2026 17:44:39 : WRN UI_FRAMEWORK : JS I am more of a Swift or C# person used to verbose error messages and traceback. But maybe I have been spoiled.

@SuuntoPartnerTeam Would it be possible for suunto to open a github group with example applications that compile and show some specific details. I’m mainly thinking about reading data from bluetooth devices.