The Software Behind Every Tire: Wireless Sensing, Fusion and Bus Integration

Every TPMS sensor is a battery-constrained radio transmitting unauthenticated pressure readings across an open 433/315 MHz spectrum. TPMSCore examines the receiver-side software stack that fuses noisy RF packets, defeats spoofing and relay attacks, and hands verified pressure data safely into the vehicle's CAN and LIN networks.

From a Dashboard Warning Light to a Trusted Node on the Vehicle Network

Early TPMS implementations treated sensor data as a simple threshold check: below a pressure floor, light a warning icon. Modern software-defined vehicles treat each wheel sensor as an untrusted network endpoint whose data must be filtered, cryptographically validated, and fused with vehicle dynamics before it can influence safety systems like electronic stability control.

Core Engineering Areas

• Low-Power Wireless Sensor Fusion — Each TPMS sensor transmits infrequently to conserve a decade-long battery budget, so receiver software must reconstruct a continuous, trustworthy pressure signal from sparse, jittery, and occasionally missing RF packets.
• RF Security Against Spoofing and Relay Attacks — Because early TPMS protocols broadcast a static sensor ID and unencrypted pressure value, they are trivially spoofable with a $20 software-defined radio; modern receiver software closes this gap with cryptographic pairing and physical-layer anomaly detection.
• CAN/LIN Bus Gateway Integration — Once a pressure reading survives fusion and cryptographic validation, gateway software must map it onto the vehicle's signal architecture, respecting bus load budgets, degraded-mode fallback logic, and diagnostic trouble code standards.

Technical Articles

• Defeating TPMS Relay and Spoofing Attacks with Cryptographic Sensor Pairing
• Kalman Filtering Behind the Dashboard: Sensor Fusion Algorithms for Direct TPMS

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