Gran Turismo Telemetry

Python library for interfacing with Polyphony Digital's telemetry service for motion rigs in GT6/GTS/GT7 (maybe older?)

Features

• Playstation IP Address discovery
• Synchronous and asynchronous callbacks with thread pool execution
• Game event observer
• Telemetry as an object or a dictionary
• Configurable callback worker threads for optimal performance

Installation

Install with pip: pip install gt-telem

Note: The GUI uses heartbeat type "B" to access motion data including steering wheel rotation.

Requirements:

• Gran Turismo 7 running on PlayStation
• Telemetry enabled in GT7 settings
• PlayStation and PC on the same network
• Python 3.7+ with tkinter (included with most Python installations)

Usage

Getting telemetry is fairly straightforward. Here's a simple example that runs the client on a separate thread:

from gt_telem import TurismoClient
from time import sleep

tc = TurismoClient()

tc.start()
for i in range(10):
    sleep(1)
    print(tc.telemetry.position)
tc.stop()

If you're working inside of an asynchronous framework, use run_async()

from gt_telem import TurismoClient

class MyAsyncClass:
    def __init__(self, tc: TurismoClient):
        self.tc = tc
        self.cancel_tkn: asyncio.Event = None

    async def start_telem(self):
        await self.tc.run_async(self.cancel_tkn)

Otherwise run like this if you only care for callbacks:

import json

from gt_telem import TurismoClient
from gt_telem.models import Telemetry

# Both sync and async callbacks are supported
async def print_telem_async(t: Telemetry):
    print(json.dumps(t.as_dict, indent=4))

def print_telem_sync(t: Telemetry):
    print(f"Speed: {t.speed_mps:.2f} m/s")

tc = TurismoClient()
tc.register_callback(print_telem_async)  # Async callback
tc.register_callback(print_telem_sync)   # Sync callback
tc.run()  # Blocking call

The full list of telemetry is available here.

Events

The following events are currently supported:

• gt_telem.events.GameEvents
  • on_running - The game has started/is running
  • on_in_game_menu - Outside of a race or track screen
  • on_at_track - Player has entered a track screen
  • on_in_race - Fired when the simulation starts, before player control
  • on_paused - When the player pauses the race
  • on_race_end - Fires when a player leaves the simulation
• gt_telem.events.RaceEvents
  • on_race_start - Fired at the beginning of Lap 1
  • on_race_finish - Fired when the last lap is completed (checkered flag)
  • on_lap_change - Fires when the lap counter changes (including 0->1)
  • on_best_lap_time - A new best lap is set
  • on_last_lap_time - A new last lap time is available
  • on_track_detected - Track has been detected
• gt_telem.events.DriverEvents
  • on_gear_change - A gear has changed
  • on_flash_lights - High Beams have been activated
  • on_handbrake - Player has utilized handbrake
  • on_suggested_gear - Fires when the game suggests a gear change
  • on_tcs - Traction Control System activated
  • on_asm - Active Stability Management activated
  • on_rev_limit - Engine revs exceed threshold
  • on_brake - Player depresses brake
  • on_throttle - Player depresses throttle
  • on_shift_light_low - Engine revs entered lower bound for shift light
  • on_shift_light_high - Engine revs exceed upper bound for shift light

Example using Events

Here's a more complex example of a telemetry recorder that hooks into race start, pause, and race end:

from gt_telem import TurismoClient
from gt_telem.events import GameEvents
from gt_telem.errors.playstation_errors import *

class MySimpleTelemetryRecorder():
    def __init__(self, tc: TurismoClient):
        self.tc = tc
        self.storage = []

    def start(self):
        self.tc.register_callback(MySimpleTelemetryRecorder.receive_telem, [self])

    def stop(self):
        self.tc.deregister_callback(MySimpleTelemetryRecorder.receive_telem)
        # save self.storage somewhere

    @staticmethod
    async def receive_telem(t, context):
        context.storage.append(t)
        print(f"{t.engine_rpm}RPM - {t.boost_pressure}kPa")
        print(f"Best: {t.best_lap_time}\tLast: {t.last_lap_time}")


if __name__ == "__main__":
    try:
        # Configure with more workers for heavy telemetry processing
        tc = TurismoClient(max_callback_workers=18)
    except PlayStationOnStandbyError as e:
        print("Turn the playstation on")
        print(e)
        exit()
    except PlayStationNotFoundError as e:
        print("Maybe I'm on the wrong network")
        print(e)
        exit()
    ge = GameEvents(tc)
    mstr = MySimpleTelemetryRecorder(tc)
    ge.on_in_race.append(mstr.start)
    ge.on_race_end.append(mstr.stop)
    ge.on_paused.append(mstr.stop)
    print("Listening for telemetry. CTRL+C to stop")
    tc.run()

TurismoClient.run() is a blocking call, but does shut down gracefully when a keyboard interrupt is issued. It also accepts a cancellation token.

Advanced Example

See this jupyter notebook that displays a live race view and how to properly pass a token to shut down gracefully.

Heartbeat Types

Gran Turismo 7 supports different heartbeat message types that provide additional telemetry data. You can specify the heartbeat type when creating a TurismoClient:

from gt_telem import TurismoClient

# Standard heartbeat (default) - 296 bytes
tc_standard = TurismoClient(heartbeat_type="A")

# Motion data heartbeat - 316 bytes with additional motion fields
tc_motion = TurismoClient(heartbeat_type="B")

# Extended data heartbeat - includes filtered inputs and energy recovery
tc_extended = TurismoClient(heartbeat_type="~")

Heartbeat Type "A" (Standard)

This is the default format that provides all the standard telemetry data. Compatible with most existing GT7 telemetry applications.

Heartbeat Type "B" (Motion Data)

Adds 5 additional motion-related fields:

• wheel_rotation_radians - Wheel rotation in radians
• filler_float_fb - Possibly lateral slip angle or other motion data
• sway - Vehicle sway motion
• heave - Vehicle heave motion
• surge - Vehicle surge motion

Access motion data using the motion_data property:

telemetry = tc.telemetry
if telemetry and telemetry.motion_data:
    motion = telemetry.motion_data
    print(f"Sway: {motion['sway']:.3f}")
    print(f"Heave: {motion['heave']:.3f}")
    print(f"Surge: {motion['surge']:.3f}")

Heartbeat Type "~" (Extended Data)

Provides additional fields including:

• throttle_filtered - Filtered throttle input
• brake_filtered - Filtered brake input
• energy_recovery - Energy recovery value
• Additional unknown fields for future expansion

Access extended data using the extended_data property:

telemetry = tc.telemetry
if telemetry and telemetry.extended_data:
    extended = telemetry.extended_data
    print(f"Energy Recovery: {extended['energy_recovery']:.3f}")
    print(f"Filtered Throttle: {extended['throttle_filtered']}")