EUC Logger

EUC Logger is a live telemetry dashboard and a black box for your electric unicycle. Connect over Bluetooth and ride: the app shows what the wheel is doing, warns you out loud when it matters and writes the ride to a file by itself. Afterwards, take it apart on charts and a map, or put its numbers onto your video.

WHILE YOU RIDE
• 33 wheel metrics as tiles — speed, PWM, power, voltage, currents, charge, temperatures, lean, odometer, both BMS packs — each with a chart and session min-max
• The dashboard learns your wheel: tiles it never fills hide themselves; a missing value is a dash, never a zero. Pinch to resize, hold to reorder, swipe between pages
• When the link drops the screen says so: dashes and a gap in the chart, not frozen numbers
• The same dashboard runs on Apple Watch

WHAT IT WARNS ABOUT
• Twelve kinds: PWM, speed, lean, motor and battery temperatures, both currents, two levels of low charge, tyre pressure (InMotion), link lost and restored. Thresholds are per wheel; PWM is on from the start, at 80 %
• Each kind has its own sound, so you know what fired without looking; your own spoken phrase can replace it
• Audible with the silent switch on and the screen locked; other audio is ducked only while an alert sounds
• This adds to the wheel's own tiltback and beeper, not replaces them

RECORDING RUNS ITSELF
• No start button: the file opens itself; a dropped link or a relaunch does not end the session
• One row per telemetry frame, 2 to 20 a second depending on the wheel
• 63 CSV columns, the first ten exactly the DarknessBot layout, so analysers of its logs open the file
• Share a ride as a file with a privacy zone around home, sealed by the phone's secure chip: the receiver sees if it was altered. Trim a spare piece into its own file

AFTER THE RIDE
• Charts: up to three metrics at once, pinch to zoom, hold for a ruler, landscape for full screen; line, area or bars, and a break where telemetry went silent
• The route on a map, coloured by speed, with ride playback. On a track the app finds laps itself, times them and shows the best one
• 0–60 and 0–100 km/h from a standstill, or your own pair of targets — by the wheel, GPS and dragy, every run of the ride in a table
• Heart rate from Apple Watch: a column, a tile and a chart

TELEMETRY OVER VIDEO
• A clip plus your recording — numbers land on the frame: tiles, bars, sparklines, speed and lean arcs
• Where the footage runs past the recording or the link was silent, the plate shows a dash
• Show the app's sync QR code to the camera, and the clip lines up with the ride by itself
• Projects are saved. Export up to 4K, H.264 or HEVC, Reels and YouTube presets

YOUR WHEELS
• Each wheel keeps its own thresholds, layout, name and archive; a wheel that is off opens as a frozen dashboard
• Six protocol families. Three verified on hardware we own: InMotion V2 (P6), Begode-compatible (SV168), Veteran-compatible (NOSFET Aero). Three more — KingSong with Rockwheel, InMotion V1 (V5–V10), Ninebot Z — decoded from open sources and riders' captures
• Your wheel not listed? Connect anyway: the protocol is recognised from the wheel itself
• The app changes nothing in the wheel. Exception: SmirnoV firmware settings, balance tuning behind a warning
• An optional dragy DRG71 (Pro) GPS meter is read alongside: speed, g-forces, coordinates
• No wheel at hand? Demo mode behind the gear icon runs the app on a simulated ride

PRIVACY
• Free: no accounts, no ads, no analytics, no third-party SDKs
• Rides stay on the phone; optionally copied to iCloud Drive
• Location is used for speed and route: both go into the ride file and onto the map. Map imagery comes from Google's static maps — only the shown area goes into that request
• Each closed ride's seal — no ride data, no location — is registered on euclogger.com; this can be turned off. Diagnostic reports leave only on your command

iPhone, iOS 17+; watch dashboard needs watchOS 10+. English and Russian. Metric units only.
euclogger.com