Tracktuned
NETWORK ARCHITECTURE · v2.1.17 ENHANCED

Network & Wireless Operating Modes

Tracktuned Link features an enterprise-grade dual-mode wireless stack built on OpenWrt 25 and Linux 6.12. Switch seamlessly between a standalone pit-lane AP and your shop WiFi network with zero risk of lockout.

Interactive Mode Architecture

Join Local WiFi (Station / Client Mode) Recommended for Shop & Garage

In Station Mode, the Link joins your existing 2.4GHz workshop or home WiFi network. Both your laptop and the Link share the same local subnet.

Laptop / PC
IP: 192.168.1.50
Full Internet & Cloud Sync
Shop WiFi Router
SSID: "PORTAL" (192.168.1.1)
mDNS: 224.0.0.251:5353
Tracktuned Link
IP: 192.168.1.123
tracktuned.local
  • Keep Internet Access: Check live maps, download calibration files, and use Haltech Cloud without WiFi switching.
  • 100% Radio Bandwidth: Link turns off its own AP so the entire radio is dedicated to low-latency USB/IP communication.
  • Subnet Auto-Discovery: The Desktop App v2.2.5 scans all 254 IPs concurrently and locks onto the Link in <100ms.

How mDNS (tracktuned.local) Works

In firmware v2.1.17, OpenWrt's lightweight mDNS responder (umdns) is configured across both the internal bridge (lan) and the station interface (wwan):

# /etc/config/umdns
config umdns
    option jail 1
    list network lan
    list network wwan

When you type http://tracktuned.local in your browser or when the desktop app boots:

  • Your operating system sends a multicast query to 224.0.0.251:5353.
  • The Link responds immediately with its current IP address on your network.
  • Zero manual IP configuration required.

Zero-Brick Watchdog Failsafe Architecture

What happens if you connect the Link to your garage WiFi, but then take the car to a race track where that WiFi does not exist?

Zero-Brick Protection: You will never get locked out. The on-device watchdog daemon (/usr/sbin/wifi-watchdog) automatically manages failsafe fallback.
1. 40-Second Boot Grace Period
Upon startup, the watchdog sleeps for 40 seconds to allow the radio hardware, WPA3/WPA2 handshakes, and router DHCP servers to complete negotiation without false alarms.
2. 60-Second Association Verification
The watchdog monitors kernel state via ubus call network.interface.wwan status. If the saved WiFi network is available, the connection locks in permanently.
3. Automatic Standalone AP Restoration
If the saved WiFi network is out of range for >60 seconds, the Link automatically disables station mode, restores the standalone Tracktuned Link AP on Channel 1, and posts an alert banner in the web panel.

Subnet Collision Isolation

If your home router also uses the 192.168.8.0/24 subnet, standard routers will suffer from routing collisions.

Tracktuned Link includes an automated collision mitigation hotplug script (/etc/hotplug.d/iface/99-subnet-protect). When an upstream IP collision is detected on DHCP assignment, the internal bridge automatically pivots to 192.168.9.1, preventing any packet loss.

Hardware Reset Button

At any time, you can press and hold the physical reset button on the side of the Tracktuned Link for 3 seconds to immediately force-reset WiFi settings back to the default standalone AP mode on Channel 1.