Matek ELRS CRSF to SBUS converter

1. Product Summary

2. Technical Specifications

Table 2-1. CRSF ↔ SBUS Converter Specifications

3. Applications

• FPV Drones: Integrate modern CRSF receivers with legacy SBUS flight controllers.
• Fixed-Wing Aircraft: Enable ExpressLRS or Crossfire receivers to control traditional SBUS servos or FCs.
• Legacy Systems: Retrofit older UAV or RC platforms with modern control link standards.
• Testing & Integration: Use as a protocol bridge for development or mixed-protocol environments.

4. Wiring & Installation Notes

• Provide a clean and regulated 5 V power source to the converter.
• Use the VBAT pad (0 – 36 V) only for battery voltage telemetry sensing — not for powering the converter.
• Connect TX/RX pins to corresponding receiver or flight controller UARTs according to the desired conversion direction.
• Ensure correct signal orientation when switching between CRSF → SBUS and SBUS → CRSF modes.
• Observe LED indicator behavior:
  • Slow blink – no signal detected.
  • Solid light – conversion active and linked.

5. Integration Recommendations

• Ideal for bridging ExpressLRS / Crossfire receivers with older SBUS-only flight controllers.
• Maintain short wiring paths to reduce latency and signal noise.
• Use twisted-pair or shielded signal cables for clean data transmission in high-current environments.
• Test conversion mode (CRSF or SBUS direction) before final assembly.
• Pair with compatible receivers and controllers for best performance.

6. Practical Summary

The Matek ELRS CRSF → SBUS Converter is a versatile and compact bidirectional converter that enables interoperability between CRSF and SBUS systems. With sub-7 ms latency, dual voltage input options, and telemetry support, it’s a perfect solution for pilots and engineers integrating modern ExpressLRS or Crossfire receivers into legacy SBUS-based aircraft, drones, or flight controllers. Each package includes two converters for flexible use across multiple builds.