01 / Receive
Standards-based BLE
Receives the Bluetooth SIG Heart Rate Service (0x180D) and Heart Rate Measurement characteristic (0x2A37) from compatible wearables.
LedgeLink — Wireless Sensor Gateway for CAN
Put the driver into the telemetry stream
Driver heart rate on the CAN bus.
LedgeLink receives compatible Bluetooth Low Energy heart-rate data and broadcasts it directly onto the racecar CAN network, ready to display, log, and analyze alongside vehicle telemetry.
Plug it in. LedgeLink does the rest. Connect power, ground, CAN-H, and CAN-L. There is no device menu to manage, no conventional Bluetooth pairing, and no phone or companion app in the in-car data path.
Driver telemetry
Your driver generates data too.
Race teams collect enormous amounts of information about what the car is doing. LedgeLink adds another channel: what the driver is doing.
02 / Broadcast
Direct to CAN
Places BPM and source-validity data onto the car's CAN network without routing the live data through a phone.
03 / Analyze
One telemetry timeline
Display or log heart rate beside lap, engine, chassis, and other vehicle channels supported by your dash or logger.
Wearable compatibility
Built around the standard heart-rate service.
LedgeLink should work with monitors, watches, chest straps, and other wearables that expose the standard Bluetooth Low Energy Heart Rate Service. Some watches require a “Broadcast Heart Rate” or similarly named mode. Devices using proprietary Bluetooth-only protocols may require specific support.
Hands-off in normal operation. LedgeLink discovers, selects, and reconnects to supported devices automatically. Once installed, the driver does not configure LedgeLink, pair devices, open an app, press a button, or select a source before driving.
Physically tested
Garmin Fenix 8 Pro
With heart-rate broadcasting enabled, LedgeLink received the standard BLE heart-rate measurement and placed BPM on CAN.
Because LedgeLink listens for the standardized Bluetooth SIG Heart Rate Service, it should also work with any compatible BLE wearable that broadcasts heart rate using that service. Some devices may require their heart-rate broadcast mode to be enabled.
Physically tested
HandPlus B2 / Chileaf S332
In addition to BPM, LedgeLink can place the wearable's additional temperature channels, BODY_TEMP field, and battery level onto CAN for logging and analysis.
Each HandPlus also supplies a unique six-byte HRM identifier that LedgeLink transmits with the heart-rate message. Assigning a HandPlus to a driver lets the wearable identify that driver's heart-rate source in logged CAN data.
Buy the tested HandPlus B2 on Amazon (opens in a new window)
The precise meanings of the proprietary TEMP1 and TEMP2 channels have not yet been conclusively established.
Endurance racing
Automatic driver identification.
LedgeLink has been tested with the MOKO driver-ID wristbands and pucks used with Flagtronics in endurance-racing environments, including WRL and ChampCar. It can place the detected six-byte driver identifier, signal strength, and validity onto CAN so logged telemetry can follow the active driver during driver changes without manual selection.
Two useful identification paths. A supported Flagtronics-style tag identifies the active driver independently of the heart-rate monitor. A HandPlus wearable also carries its own identifier in the LedgeLink heart-rate frame, allowing a team to associate that assigned wearable with its driver in logged data.
CAN integration
Four wires. Documented messages.
The purpose-built board is designed for 12 V racecar installation with +12 V, Ground, CAN-H, and CAN-L. It connects to an existing, properly terminated CAN bus and does not add permanent bus termination.
| CAN ID | Message | Period | Contents |
|---|---|---|---|
| 0x720 | DriverTag | 200 ms | Driver ID, RSSI, validity |
| 0x721 | HeartRate | 200 ms | HRM ID, BPM, source and validity |
| 0x722 | HandPlus | 200 ms | Temperature channels, BODY_TEMP, battery, validity |
| 0x723 | ModuleHealth | 1000 ms | Internal module die temperature and validity |
Factory-default configuration works out of the box on a matching network: base ID 0x720, standard 11-bit CAN 2.0, 1 Mbit/s. CAN base address, bitrate, and message periods remain configurable for other installations.
Production status
Purpose-built hardware is in progress.
The dedicated production PCB is in fabrication. When the first boards arrive, they will move through electrical, RF, CAN, enclosure, harness, and in-car validation before release.
- Production PCB in fabrication
- 12 V vehicle architecture
- Electrical and RF validation next
- Harness, enclosure, and in-car validation to follow
LedgeLink launch updates
Join the product-specific list for availability information and product updates.
Motorsport telemetry only. LedgeLink is intended solely for motorsport telemetry and informational use. It is not a medical device and must not be used for diagnosis, treatment, medical monitoring, or safety-critical decisions.