sim-to-motec

Simple racing/driving sim telemetry to MoTeC log conversion

Currently supports AMS2 and GT7

Prebuilt Windows Executables

Due to complexities compiling library dependencies on Windows, prebuilt binaries can be found in the releases section. Each exe file is generated using pyinstaller and is a self extracting archive containing a python interpreter as well as the scripts and dependencies from this repo

If you are on a *nix OS or prefer not to override security to run an untrusted executable, then skip to Getting started with the scripts

MoTeC i2 Workspace

There is a MoTeC i2 Workspace in MotecWorkspace that is based on the worksheet here: https://github.com/stevendaniluk/SDMotecWorkspace and has been tweaked by RacingLegend1234 for use with the AMS2 channel names.

A zip file of the worksheet is available in the releases section

AMS2 GPS Offsets

The AMS2 GPS co-ordinate tweaks were kindly donated by viper4r from their live event monitoring tool https://github.com/eckhchri/pcars-ds-liveview

Getting started with the scripts

git clone https://github.com/GeekyDeaks/sim-to-motec.git
cd sim-to-motec
python3 -m venv py
source py/bin/activate
pip install -r requirements.txt

GT7

Convert UDP packets from the GT7 telemetry to a MoTeC i2 log file. Currently can determine the car, and potentially the venue/track which is required for MoTeC to generate a track map from the fake GPS. Expects UDP samples to arrive at 60Hz which appears to hold true even when running in 120Hz mode

A new i2 log file will be created each time the logic detects a session change, usually via the lap number decreasing.

There is an option enable logging of replays, but this can result in unwanted log file creation.

Example:

python gt7-cli.py 192.168.1.101 --driver "Wilma Cargo"

Usage:

python gt7-cli.py [-h] [--name NAME] [--driver DRIVER] [--session SESSION] [--vehicle VEHICLE] [--venue VENUE] [--freq FREQ] [--saveraw] [--loadraw] addr

positional arguments:
    addr               ip address of playstation or raw file

options:
    -h, --help         show this help message and exit
    --driver DRIVER    Driver name
    --session SESSION  Session e.g. Practice, Qualify, Race
    --vehicle VEHICLE  Override name of vehicle
    --venue VENUE      Override Venue/Track name
    --replay           log replay telemetry
    --freq FREQ        frequency to collect samples, currently ignored
    --saveraw          save raw samples to an sqlite3 db for later analysis
    --loadraw          load raw samples from an sqlite3 db

The CSV file containing the car IDs used to determine the vehicle name can be updated via the following command:

curl https://raw.githubusercontent.com/ddm999/gt7info/web-new/_data/db/cars.csv -o stm/gt7/db/cars.csv

Same for the Track IDs for the detection logic:

curl https://raw.githubusercontent.com/ddm999/gt7info/web-new/_data/db/course.csv -o stm/gt7/db/course.csv

AMS2

Convert AMS2 samples from shared memory to MoTeC i2 log files. Currently can detect the car and venue as well as the session type.

Example:

python ams2-cli.py

Usage:

python ams2-cli.py [-h] [--freq FREQ] [--saveraw] [--loadraw LOADRAW]

options:
    -h, --help         show this help message and exit
    --freq FREQ        frequency (Hz) to collect samples
    --saveraw          save raw samples to an sqlite3 db for later analysis
    --loadraw LOADRAW  load raw samples from an sqlite3 db

Raw samples

The base logger supports saving the raw samples to an sqlite3 db under logs/raw for later analysis or playback. These files can get pretty large over extended sessions. There is a RawSampler which can read in an sqlite3 db and 'replay' the samples through a logger to allow offline development or debugging. The current loggers support this via the --loadraw parameter e.g.

python ams2-cli.py --loadraw logs/raw/ams2/1679937106.db

Architecture

Sampler -> Logger -> MoTeC

• Sampler collects the raw UDP/Memory packets from the SIM and queues them
• Logger converts and saves samples and decides if a new session/log is to be created, optionally saving the raw samples for later playback
• MoTeC creates a MoTeC i2 ld and ldx file from the collected samples and laptimes

Sampler and Logger are Sim specific, but they have BaseSampler and BaseLogger to handle the core loops and common functions like adding samples, saving a log file and starting a new one

Tests

python -m unittest discover -v -s stm -p '*_test.py'

TODO

• port AC UDP logger from https://github.com/GeekyDeaks/raw-sim-telemetry

References / Kudos

• AMS2 GPS Details from https://github.com/eckhchri/pcars-ds-liveview
• GT7 telemetry decode https://github.com/snipem/gt7dashboard
• Salsa20 https://github.com/oconnor663/pure_python_salsa_chacha
• GT7 DB Files: https://github.com/ddm999/gt7info
• GT7 track detection https://github.com/Bornhall/gt7telemetry/