The Setup
The T800 Box is a small always-on device that sits in your garage. It connects to an OBDLink MX+ adapter (plugged into your Tesla) via Bluetooth Classic — completely non-invasive, zero impact on vehicle sleep.
What You Need
- T800 Box (provided by us) — compact, silent, low-power Intel N100 device
- OBDLink MX+ & OBD-II cable (purchased separately) — the only adapter we support, chosen for its proven Tesla compatibility and zero interference with vehicle sleep mode
- Home Wi-Fi or Ethernet — for cloud sync and remote access
Don’t want to deal with the adapter yourself? We offer a pre-configured bundle: we purchase the OBDLink MX+, pair and test it with your T800 Box, and ship everything ready to plug in. Or we can order it on your behalf with the official invoice in your name.
We exclusively support the OBDLink MX+ to guarantee reliability and ensure your Tesla’s sleep behavior is never disrupted. Cheaper adapters can wake the car continuously, causing phantom drain — the opposite of what we’re trying to solve.
Step 1: Plug In
Insert the OBDLink MX+ into your Tesla’s OBD-II port (driver’s side, under the steering column). Place the T800 Box near your car — on a shelf, in the garage, wherever there’s power and network.
Step 2: Connect
Open the T800 iOS app. It discovers the T800 Box via BLE (Bluetooth Low Energy) and walks you through:
- Wi-Fi configuration for the T800 Box
- Verifying the Bluetooth Classic link between T800 Box and OBDLink MX+
- Confirming data is flowing from your vehicle
The app uses BLE for setup and diagnostics only — it does not connect to your car directly.
Step 3: Monitor
That’s it. The T800 Box collects data from your Tesla via Bluetooth Classic whenever the car is parked in range. Health scores, trend charts, and alerts are delivered to your phone and web dashboard.
Two Modes: Garage & Mobile
Garage mode (default) — The T800 Box sits in your garage on Wi-Fi. It monitors your car whenever it’s parked at home: battery health, suspension pressure, 12V voltage, thermal baselines, and home AC charging.
Mobile mode — An optional, temporary mode for collecting supplemental data during Supercharging, driving, targeted fault diagnosis, or pre-purchase / inspection sessions. Power the T800 Box from the car only when needed, then return it to garage use. We do not recommend leaving it in the vehicle full-time, since in-car operation adds complexity and continuous power draw. Data syncs to the cloud when you’re back on Wi-Fi, or immediately via your phone’s hotspot.
What Happens Behind the Scenes
- The OBDLink MX+ reads CAN bus messages from your Tesla’s diagnostic port (passive, read-only — no commands are ever sent)
- The T800 Box connects to the MX+ via Bluetooth Classic and decodes 230+ CAN signals across 6 subsystems: battery health, air suspension, 12V system, thermal management, drivetrain, and charging efficiency
- Data is analyzed locally for anomalies using configurable rules and trend detection
- Aggregated health metrics sync to the cloud via Wi-Fi for scoring and long-term trend analysis
- You receive alerts only when something needs attention — no noise
The Three Networks
The T800 Box manages three independent networks:
| Network | Protocol | Purpose |
|---|---|---|
| OBD Link | Bluetooth Classic | Data collection from OBDLink MX+ |
| App Link | BLE (Bluetooth Low Energy) | First-time setup, diagnostics, Wi-Fi provisioning |
| Cloud Link | Wi-Fi / Ethernet | Data upload, remote access, OTA updates |
This separation ensures that a problem with one link never affects the others.
Supported Vehicles
| Model | Support |
|---|---|
| 2017 Model X 100D | Verified |
| Other Model S/X variants | Validation in progress |
T800 is built for Tesla Model S and Model X, with current field validation based on a 2017 Model X 100D. Additional Model S/X variants are being validated. If you have a different configuration, contact us before ordering.
Why Only OBDLink MX+?
Most cheap OBD adapters have a critical flaw: they send periodic polling messages that wake the Tesla’s CAN bus, preventing the car from entering sleep mode. This causes the very phantom drain that owners are trying to avoid.
The OBDLink MX+ is the only adapter we’ve verified to:
- Support passive CAN bus listening
- Respect Tesla’s sleep behavior
- Maintain stable Bluetooth Classic connections over weeks
- Handle reconnection gracefully without user intervention
We’d rather support one adapter well than support many poorly.
No Technical Skills Required
There are no wires to splice, no software to install on your Tesla, and no configuration files to edit. If you can plug in a USB cable, you can set up T800.