d4rk / ac_shifting_leds

A Linux utility for Assetto Corsa and Dirt 4 that lights up the shifting LEDs on the Logitech G29 wheel based on the car's engine RPM.

Logitech G29 Shifter LEDs for Assetto Corsa & Dirt 4

A Linux utility for Assetto Corsa and Dirt 4 that lights up the shifting LEDs on the Logitech G29 wheel based on the car's engine RPM.

Requirements

• NodeJS
  • Ubuntu: sudo apt install nodejs
• node-hid
  • npm install node-hid

Usage

1. Download ac_shifting_leds.js.

2. In terminal, launch ac_shifting_leds.js:

#:~/Downloads$ node ac_shifting_leds.js 

3. Then launch your game of choice and start playing.

If you switch back to the terminal, you should see some success messages:

Connecting to Dirt / Codemasters
Connecting to Assetto Corsa
Assetto Corsa: subscribing to updates
{
  carName: 'bmw_1m',
  driverName: 'Player',
  identifier: 4242,
  version: 1,
  trackName: 'drift',
  trackConfig: 'drift'
}
Peak RPM set to 7000
Connected to Logitech G29 wheel
Receiving data. First message:
{
 "identifier": 97,
 "size": 328,

Potential Issues

• You may get HID permission errors if the G29 isn't accessible to your user account. If that's the case, then you may need to update your udev rules. See the instructions in the Oversteer docs for more details.

• In Dirt 4, you will need to enable UDP telemetry data. Open the following file in your favorite text editor:

~/.local/share/feral-interactive/DiRT 4/VFS/User/AppData/Roaming/My Games/DiRT 4/hardwaresettings/hardware_settings_config.xml

and change:

<udp enabled="false" extradata="3" ip="127.0.0.1" port="20777" delay="1" />`

to

<udp enabled="true" extradata="3" ip="127.0.0.1" port="20777" delay="1" />`

Feedback

Feel free to file issues here.

ac_shifting_leds's Issues

Some feedback

So I tested this on Dirt 4 and Dirt Rally, it works on both.

However, I have to launch the script with root privileges (sudo). Maybe I can add my user to a group to avoid this.

I think the Dirt/CM part could work on quite a bunch of CM games (F1 2017, Grid Autosport,...) as there are similar config lines in the hardware_settings_config of these games.

Maybe it could also work with Project Cars / PC2 with some futher coding.

Cheers

Buffer overflow error

When I run Dirt4, I see the following:

$ node -v                                                                                                                                                                                                                                                                                   
v12.21.0

$ node ac_shifting_leds.js

Connecting to Dirt / Codemasters
Connecting to Assetto Corsa
internal/buffer.js:82
  throw new ERR_OUT_OF_RANGE(type || 'offset',
  ^

RangeError [ERR_OUT_OF_RANGE]: The value of "offset" is out of range. It must be >= 0 and <= 64. Received 148
	at boundsError (internal/buffer.js:82:9)
	at Buffer.readFloatForwards [as readFloatLE] (internal/buffer.js:528:5)
	at BufferReader.float (/home/ttelford/src/github/ac_shifting_leds/ac_shifting_leds.js:54:30)
	at CodemastersClient._processUDPMessage (/home/ttelford/src/github/ac_shifting_leds/ac_shifting_leds.js:400:25)
	at Socket.<anonymous> (/home/ttelford/src/github/ac_shifting_leds/ac_shifting_leds.js:104:13)
	at Socket.emit (events.js:314:20)
	at UDP.onMessage [as onmessage] (dgram.js:921:8) {
  code: 'ERR_OUT_OF_RANGE'

I'm happy to include any other dependency information - but I'm not quite sure how to gather them in Node.js

Support for Assetto Corsa Competizine (ACC)

Does the tool also support ACC?