PWCOS (JetSki Telemetry)
Marine telemetry and engine management bridge for personal watercraft, monitoring RPM, water temp, GPS speed, and hull attitude.
PWCOS is a marine-grade digital instrument cluster and telemetry bridge designed for personal watercraft (Sea-Doo 4-TEC / GTI SE). Built to replace aging analog gauges prone to sun fading and water intrusion, PWCOS leverages an ESP32-S3 paired with an IP67 sunlight-readable touchscreen display. The system interfaces with the watercraft’s diagnostic CAN bus to decode real-time engine RPM, coolant temperatures, battery voltage, and fuel flow, while integrating a high-rate Neo-M8N GPS module and solid-state bilge relay controls.
Systems Architecture Matrix
Hardware & Silicon
ESP32-S3 microcontroller / WT32-SC01 integrated smart display
Bus & Protocols
BRP 4-TEC Diagnostic CAN bus + UART GPS serial interface
Edge Controller & Engine
ESP32-S3 marine engine state machine with transient power suppression
Cloud Infrastructure
Distributed cloud ledger, authentication & real-time synchronization
Technical & Telemetry Specifications
| Specification / Parameter | Verified Value / Electrical Mapping |
|---|---|
| Controller / Display | WT32-SC01 (ESP32-S3 + 3.5" capacitive IPS high-nit touchscreen) |
| CAN Transceiver | SN65HVD230 on GPIO 4 (TWAI_RX) / GPIO 5 (TWAI_TX) |
| GPS Receiver | U-blox Neo-M8N via UART2 on GPIO 18 (RX) / GPIO 17 (TX) |
| Auxiliary Relays | GPIO 12 (Marine Nav Lights) / GPIO 13 (Bilge Pump) |
| Battery Monitor | GPIO 36 (ADC) via 10k/2.2k voltage divider network |
| Power Supply | Automotive buck converter with 40V+ TVS transient spike suppression |
C:\_Projects\PWCOSProduction & Field Verification
Direct CAN bus decoding of Rotax 4-TEC marine engine parameters
High-nit sunlight-readable touchscreen UI with 1-tap nautical high-contrast mode
High-precision GPS speed tracking unaffected by impeller cavitation or paddle wheel slip
Automated bilge pump safety cycle with manual override solid-state switching
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