07/05/2026 v1.73

• Fix exporting bug to acViewer with AB track and ForceRaceMode.
• Fix log automatically exported when back to pit with AB track and ForceRaceMode.
• In ForceRaceMode, going to menu or restarting a session now cancels current stint.
• Fix UI size with Auto Reduce UI option and ForceRaceMode.
• Menu interface (in main menu, setup) now shows exporter options.
• acViewer now shows MRP (Max Rotation Point) on the racing line. Only with defined corners.
• acViewer now shows if a lap is valid or not in lap selectors.
• acViewer: variance will automatically adjust to +-1s or +-2s depending on the compared lap.
• acViewer Take Screenshot: Now shows a notification, with a button to save the screenshot as a file.
• acViewer Take Screenshot: fix decay that could happen with CSP 0.3.x.
• New binding in Extended Control app: acViewer Take Screenshot.
• acViewer Exchange: filters and trim option now saved, will remain between sessions.
• acViewer Exchange: Trim option replaced by "Trim selected", allowing sharing current main stint lap.
• If not in pit, Motec and acViewer buttons are disabled. Works if game is paused.
• Ballast, Restrictor, Stability Control now saved and shown in acViewer.
• New Live traces available: Air Density (car one, affected by slipstream).
• New Logger setting to automatically disable logging for race sessions.
• Motec details: no more 0 value for non-existent gears (would break saving details later).
• Motec details: average Air Temp, Track Temp, Wind Direction, Wind Speed.
• A bit more compact UI for less screen space!
• UI refinements and optimizations.
• Exporter: optimization of thread management that could create overload with more than 100 laps!
• Updated interpreter to pypy3.11 v7.3.22 (bit faster).
• Integration with AC Servers (see doc).

20/02/2026 v1.72

• New: acViewer now store and display driving lines, between real track borders instead of ai line!
• acViewer Ignore Track Layout option. Allow to compare and download (exchange) other track layout files. Accessible in acViewer context menu.
• acViewer show corners (right click to edit them, please share). Auto update corners definition file from Exchange server.
• acViewer: other cars driver tag not shown on top of viewer anymore.
• acViewer can send comp lap sector times to ACSectors app targets.
• acViewer files now have game date/time, weather type, and average lap fuel level, displayed in bottom right tooltip.
• New Live traces available: Ride Height Front, Rear.
• New Live traces available: Drag, Downforce F, Downforce R, Aero Balance.
• New Live traces available: camberFL, FR, RL, RR.
• New Motec / CSV data: 1Hz "AC Weather Type".
• CSV: new lapTimes line, comma separated string.
• Optimized exporter on few channels consistency.
• Fix Live Compare stucked in some case.
• Fix acViewer sector times sometimes not in right order (v1.71)!
• Fix a bug while updating old v1.65 acViewer files.
• Optimization in settings saving.
• Optimization for CSP 0.3.x
• Updated Motec workspace.
• • Math "AC Weather Desc" to show text description from "AC Weather Type" channel (Circuit / Weather).

Hotfix 1 - When doing a stint with a fastest invalid lap, exchange with trim option would share this invalid lap. Hotfix 1 will check for fastest valid lap and share this one. If no valid lap, it will still share fastest invalid. - acViewer now selects fastest valid lap by default

Hotfix 2 - Fix app with encrypted cars. - Fix changing max data sampling race rate in logger settings.

15/12/2025 v1.71

• New: Live Trace module compare option: load an acViewer file (yours or from Telemetry Exchange) for live driver inputs comparison.
• New: Live Trace presets! Set some preset for your containers and traces to race, setup dev, track learning, per car, etc.
• New Live traces available: suspTravelFL, FR, RL, RR.
• New Live traces available: tyreloadFL, FR, RL, RR.
• New Live traces available: wheelSpeedFL, FR, RL, RR.
• Import Motec files into acViewer (from acViewer context menu). Works with Live Trace compare.
• acViewer files now have per lap average wind direction, wind speed, and sector times.
• Log Bumpstop Gap for all cars as math item, previous bumpstop channels removed.
• Log Damper Travel for wheels and heaves, with slow/fast thresholds as Math (not extended physic cars log same as suspension travel).
• Log Aero drag and downforce for all cars. Encrypted cars may log total aero downforce only (aero balance constant 45%).
• New method to get car wheelbase, cog pos, track width on encrypted cars, supporting Motec maths like rake angle, roll angle, weight transfer, etc.
• cpu time, fps, FFB pure, FFB final, physicsLate channels now always logged. Export Dev channels option removed.
• Logging data rates changed from 1 10 20 / [30 60 100 150 200] to 1 10 30 / [50 75 100 150]. Better channel structuring and definition.
• FFB final and Steering Torque now max data rate.
• Fix starting from Hotlap point in other session than Hotlap.
• Fix acViewer compare values when zooming.
• Drift and Drag mode now always export log (even if no lap).
• New context menu in the app to quickly access some options.
• Import car setup file from app context menu, notification option to directly load it on car.
• Some notifications now have button options.
• More info from the exporter back in the app, allowing more optimization.
• Code optimization and minor bug fixes.
• Faster py exporter.
• Updated Motec workspace.

29/10/2025 v1.70

• CSP Minimal version required now 0.2.8 (3424).
• New: Auto-generate a stint with outer and inner track lines for Motec Track Layout editor!
• New: Compare your current setup with another setup file (Car Setup Tab), merge some specific settings in your current car setup (offline session).
• Export Car Setup: Setup values are now grouped by setup tab names and are editable (offline session).
• Export Car Setup: Now try to automatically check some default values to export if you have not done so yet.
• New: Track Note: Store a track-specific note for the current track (Custom Data Tab).
• New: Car Note: Store a car-specific note for the current car (Custom Data Tab).
• New: Force Race Mode option. Always valid stint to export, won't stop in pit. Use with caution!
• New: Top Right button to Toggle Max Size. Maximize the app UI, allowing easy editing of Track Note, Settings, Setup Compare, etc.
• acViewer: New context menu option to switch between kph/mph. Automatically set to mph if Settings/AC/View & UI/Units set to Imperial.
• New: Now possible to set Extended Channels data rate. Previously, all were 10Hz.
• Settings now grouped for more compact UI and easier access.
• Fix a bug preventing the use of spaces in driver name (v1.66).
• Prevent acViewer context menu from opening when deleting a file.
• Prevent crash if new Live Trace added in extended car file.
• Prevent error when loading extended car file.
• Fix pyTelemetrick when exporting both CSV and rawCSV.
• Huge code reformatting (new logger class, no more globals, etc) for better performance and maintainability.
• New car:
• • RSS MP-H Lanzo S6 V8 Ev
• New Motec / CSV data:
• • Aero Drag (Data Channel, only with CSP Aeromap car)
  • Aero Downforce F (Data Channel, only with CSP Aeromap car)
  • Aero Downforce R (Data Channel, only with CSP Aeromap car)
  • Bumpstop Gap Dynamic FL, FR, RL, RR, HF, HR (Data Channel, only with CSP Cosmic suspension car)
  • Fuel Map (Data Channel)
  • Caster Angle (Data Channel)
  • Max ICE Power (Math, number)
  • Max ICE Torque (Math, number)
  • Max rpm (Math, number)
  • Max KERS KJ (Math, number)
  • Max ERS per lap (Math, number)
  • Max Turbo Boost (Math, number)
  • ABS Present (Math, 1 or 0)
  • ABS Mode (Data Channel)
  • TC Present (Math, 1 or 0)
  • TC2 Present (Math, 1 or 0)
  • TC Mode (Data Channel)
  • TC2 Mode (Data Channel)
  • Auto Shift (Math, 1 or 0)
  • Auto Clutch (Math, 1 or 0)
• Updated Motec workspace.

All VRC cars (apart formulaG) have been updated with a higher data rate for live Brake Bias, TC active, Req Throttle Pos. You can see it in the Extended Channel tab when in pit.

Due to some correction into some workspace Math Expression to generate correct Track Length, previous Trackmaps will need to be redone. Easy and quick now with the new generator. Motec Trackmap generation: see doc here

New included workspace with suspension bumpstops, aero data and aero maths (Aero Balance, Aero Pitch, ...). Cars without aeromap will just log 0 in these new aero channels.

Telemetrick now also have a very lightweigth python app (no UI) to gather more data. Activate Pytlmk app in SETTINGS/ASSETTO CORSA/PYTHON APPS to log those additionnal data.

10/09/2025 v1.66

• New: acViewer Exchange! (Thanks Jay).
• acViewer: Air Temp now in data, displayed bottom right with Track Temp.
• acViewer: Add a note to current main stint (Shown on Exchange).
• acViewer: Own fastest stint and others drivers stints now colored differently in selection lists.
• Extended Channels now show live values in UI (in pit).
• New settings button to unset AB track.
• Access to settings and acViewer in Rally Stage CSP Mode before start.
• Clean driver name from wrong characters.
• Automatically add current driver if not in drivers list.
• Support AC Pro (no Telemetry Exchange).
• New external doc integration.
• Fix pyTelemetrick not exporting acViewer file for ABtrack (v1.64 regression).
• Updated interpreter to pypy3.11 v7.3.20 (bit faster).
• New in-app extended cars:
• • RSS Formula Hybrid 2025 Alpine
  • RSS MPH Callahan V8

08/06/2025 v1.65

• Live Trace now works when spectating other cars (some data may not be available).
• acViewer: DRS zones and detection now shown on trackmap.
• acViewer: Can now zoom horizontally on traces.
• acViewer: Fix update main/comp when deleting file.
• Lap numbering starting from Lap 2 in Motec when in Race (Outlap is Lap 1).
• Fix offline race end detection when your are first.
• Fix a bug that can occur when OBS can't write some file (Windows restriction).
• Some exporter optimizations.

15/05/2025 v1.64

• New: OBS Studio video recording synchronization with Motec logging.
• New Live Traces:
• • damageFront
  • damageRear
  • plankWear
• New Motec channel:
• • tyreVirtualKM for FL / FR / RL / RR
• acViewer now show lap min and max speed.
• Some adaptation and fix for app shown on pause screen.
• Mark button pressed now show orange top bar on UI.
• Fix auto save stint in race if DSQ/DNF without going back to pit.
• Fix offline AI race that could save stint when leader pass line (v1.63 regression).
• Fix saving quali lap when finishing lap during quali session overtime.
• Fix detect timed race start and end.
• Updated Motec workspace.

25/04/2025 v1.63

• New UI icons tabs.
• New color button for Live Traces color selection.
• New setting: "Auto reduce UI". (When you go on track and logging start, show only app title bar).
• Change: Default Motec files now in "Users\user\Documents\Assetto Corsa\apps\telemetrick\exported".
• Fix saving log when starting replay.
• Fix offline race auto save with last csp.
• acViewer: Fix paste file with track name missmatch (due to v1.61 per track layout option).
• acViewer: trackID and trackLayout now in log and bottom right info tooltip.
• acViewer: Fix paste file path.
• New channels (Motec/CSV):
• • Tire Grain FL / FR / RL / RR
  • Tire Blister FL / FR / RL / RR
  • ndSlip FL / FR / RL / RR
• New Motec details:
• • Ballast (kg)
  • Restrictor (%)
  • InputMode (String Wheel, Gamepad, Keyboard)
• Updated Motec workspace.

30/03/2025 v1.62

• UI log lap numbering/invalid (*).
• Red horizontal bar when manual pit limiter on.
• Session info in Data tab.
• Minor UI improvements.
• New Live Traces:
• • tyreSlipAngleFL / FR / RL / RR.
  • tyreMidTemperatureFL / FR / RL / RR.
  • performanceMeter (delta bar time).
  • speedPerfMeter (instant speed difference).
• Live Trace UI: Can now re-order containers in UI.
• acViewer: TrackMap now correctly oriented by default.
• acViewer will now load new files only when opened, to prevent micro-freeze after exporting.
• New channels (Motec/CSV):
• • Race Positon
  • Car Heading (deg)
  • Engine Life Left
  • Gearbox Damage
  • Oil Temperature (deg)
  • Water Temperature (deg)
• Fix deleting trace in some case.
• Fix not detecting online server session switching (Prac/Quali/Race).
• Fix a rare bug case in the exporter.
• Optimized exporter (bit faster).
• Updated interpreter to pypy3.11 v7.3.19 (bit faster).

08/03/2025 v1.61

• New notification message when starting logger if app is not visible.
• acViewer: Better context menu (conditions options).
• acViewer: Triple monitor bugfix (Center screen).
• acViewer: acViewer disabled won't create its folders.
• New button in settings to check for app update available.
• Fix binding when restarting session.
• Fix Mark button sometimes missing short press.
• Some nicer UI font stuff.
• New "Vehicle Track" data (Numeric) in Motec details.
• Track Layout (skin name) now as Venue Category in Motec details.
• New settings to separate Motec logs per track layout.
• New Motec channel: Steering Torque (Nm).
• New Motec channel: Handbrake Pos.
• New Motec channels (four wheels FL/FR/RL/RR, aligned with CG Accel):
• • Tire Longitudinal Force Fx (N)
  • Tire Lateral Force Fy (N)
• New in-app extended cars:
• • VRC Prototype H - Cadenza V
  • VRC Prototype H - Isola Santini
• Updated in-app extended cars:
• • VRC Prototype H - Arden V24 (v1.2)
  • VRC Prototype H - Ferrenzo P49 (v1.4)
  • VRC Prototype H - Pageau 9T8 (v1.5)

All cars files now backup per version in telemetrick\cars\xx\vy.z

22/02/2025 v1.60

• New: AC Telemetry viewer!
• Clicking a Live Trace container now brings it to front.
• New Live Trace option to automatically pause updates with car speed under 1kmh.
• New Motec 1Hz channel: current "Tyres Compound". If we pit and change compound, we now know it!
• New Motec Math item: "Tyres" (String of current "Tyres Compound" channel).
• New bindings in Extended Control app: Toggle Logging, Cancel Stint, Toggle AcViewer, Select Driver.
• Tuned app size.
• CSV exporters now export Car Setup.
• Car Setup rewrite (More reliable and simpler).
• Updated Car Setup.i2wkb with RSS V12R setup page.
• Get AI cooldown option if module disabled.
• Bugfix Opening Motec file from AC with space in driver name.
• Bugfix Deleting trace.
• Bugfix CSV exporters.
• Bugfix in rare case when AC timestamp is 1/1/1970 0:0:0.
• Bugfix with AB tracks when teleporting to pit before passing end line.
• Added more check to not restart logging after race end.

03/02/2025 v1.58

• New Live Trace available: Engine Torque, Engine Power.
• New simple UI in mainMenu when race to enable/disable logging and change driver.
• UI title bar now updated when UI is collapsed.
• Fix error with obfuscated car ini files (car wheelbase and cogpos -1 into Motec).
• Fix settings not saved when hiding a trace container from its window.
• Fix wrong datarate in log when in race with different rate settings.

24/01/2025 v1.57

• New: Live Trace module!
• Smaller UI when on track.
• Full UI shown outside pit when log disabled.
• ABS and TC Active channel now log at 20Hz.
• Bugfix Motec exiting when ac exit.

04/01/2025 v1.56

• Better car setup lut parser.
• Car Setup.i2wkb updated: setup as Time Graph, show delta for each setup value.
• Bugfix: Exporting lap order with more than 10 laps.

27/12/2024 v1.55

• Export Car Setup as Motec Math Expression, ready to display/compare.
• Bugfix on some car connection

22/12/2024 v1.54

• Bugfix checkbox dev channels.
• Data template: new option to rename current template.
• Minor optimizations and bugfixs.

18/12/2024 v1.53

• Now check if it find Motec before showing Motec button.
• Fixed data (car wheelbase, cog, mass, track length) now saved as log details (no more samples). You can use Math to display them as channel.
• Lot more info in Motec log details (sky, humidity, pressure, weather type, tyre and fuel rate, ...).
• New data tab: Add your own data into log details, saved by templates!

15/12/2024 v1.52

• Bugfix: DRS available and active channels were inverted.
• Some internal code refactor / optimization.
• New option to automatically open exported file into Motec.
• If export to Motec, new button on Common tab in Pit:
• • Grey if no stint exported: will open / switch to Motec.
  • Red if stint exported:
  • • Left click: Open stint into Motec and switch to Motec.
    • Right click: Open stint into Motec, Stay in AC.

AC being full screen, it can be tricky to switch between applications windows. So now, you can simply get back to pit, let the team plug the car and get the data (lol!), and with one click having your telemetry in front of you!

11/12/2024 v1.51

• Minor bugfixes.

10/12/2024 v1.5

• New button to cancel current stint (no export).
• New dev channel: "Steering Torque".
• New channel: "Drivetrain Torque" (Nm).
• New channel: "Drivetrain Power" (hp).
• New channel "Brake Torque" for each wheel.
• Settings: define an automatic switch to lower sampling rate for races.
• Settings: new button to open car/track setup folder.
• Logging and exporting at variable data sampling rate:
• Telemetrick now logs and exports at four different data sampling rate.
• • 1Hz: weather conditions, fuel level, race flag, car damage, etc.
  • 10Hz: brake bias, invalidlap, drs active, kers charge, tyre pressure/grip/temperature, etc. Extended Car channels.
  • 20Hz: driver input, rpm, speed, ...
  • User defined: tire load/torque/slip angle, suspension travel, ride heigth, wheel angular speed, ...

This allow faster, smoother logging, and smaller files!

Still, logging at more than 100Hz shouldn't be necessary apart maybe for some special math channels on suspension (differential and integral calculation). Logging data rate should stay below your average fps.

06/12/2024 v1.15

• New channel "Race Flag" (1: green, 2:yellow)
• Bugfix pyTelemetrick with no lap.
• Bugfix app title on restart.
• Better race end detection.

30/11//2024 v1.14

• New channel "Track Length"(m)
• New channel "UTC Time"(s) (Show Time of Day in Motec).
• Added option "Export Dev Channels" to export a set of debug channels (ffb, fps, cpu etc).

Requested by some modders/developers, default false, should not be helpful for normal users.

29/11/2024 v1.13

• app:
• • Display driver name on track.
  • Added some shortcut button into Settings tab.
  • Error in external car channel definition file won't break the app.
  • Now open Lua Debug app on error.
  • Bugfix re-export.
  • Minor optimizations.
• pyTelemetrick exporter:
• • Loading lap files now multi threaded (faster).
  • Now run with pypy interpreter instead of CPython (5x faster!).
• New in-app extended cars:
• • RSS Formula Hybrid 2024
  • RSS Formula Hybrid X 2026
  • RSS Formula V12-R
  • VRC Formula G 2024
• RSS cars have channels: DiffEntry / DiffMid / DiffExit / BrakeMigration / BrakeMigrationRamp
• Added "Req Throttle Pos" channel on all VRC cars.

25/11/2024 v1.12

• Can override and store tracks as AB opened track (some tracks weren't recognised as such).

24/11/2024 v1.11

• Adjustable data sampling rate.

23/11/2024 v1.10

• AC Hotlap mode support.
• AC Trackday mode bugfix.

22/11/2024 v1.09

• Support AB opened track (Hill Climb, Rally Stage, ...).
• • Opened track detection is automatic, vertical app marker will turn yellow.
• Updated Help section about different logging modes.
• pyTelemetrick CSV now add a first Time column with time in second from 0.

19/11/2024 v1.08

• Bugfix stint not saved when session over time when not in race.
• Stint now considered always valid in race. Allow to analyse potential start or t1 incident...

17/11/2024 v1.07

• Bugfix logger in race.

16/11/2024 v1.06

• Pit Stop time when exit pit.
• Log now saved when disqualified from race.
• Clean old unused lap files on session start.
• Red Log checkbox text and (disabled) in app title (more visible).
• New channels:
• • Car Wheelbase (m)
  • Car COG Location
  • Car Mass (kg)
• Channels "Ride Height FR" and "Ride Height RR" removed. AC has only Ride Height Front and Rear.
• Channels "Ride Height FL" and "Ride Height RL" renamed "Ride Height Front" and "Ride Height Rear".
• Updated Motec workspace.

15/11/2024 v1.05

• Settings file now saved in %UserProfile%\Documents\Assetto Corsa\apps\telemetrick\settings.json (Updating app no more erase previous user settings).
• Better management of user settings internally.
• New button to clear UI log.
• Bugfix on setting patterns and path assignments.

14/11/2024 v1.04

• app code reformat.
• new race mode, not cutting stint when pitting during race (automatic).
• new manual save stint button.
• color info (grey=disabled, green=enable not logging, orange=logging, red=logging race mode).

13/11/2024 v1.03

• v1.03, first published version!