Matek CRSF To PWM Converter CRSF-PWM-C

Regular price $10.99 Sale

Availability: Available Unavailable

Product SKU: 47C-10421

Product Details

 Matek's Industry first CRSF to PWM (Crossfire to Servo) protocol converter adapter boards.
The Matek CRSF-PWM-C converter board has 10 PWM servo outputs. Has built-in 90A continuous current sensor.

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Pinouts and Pads

  • Tx1/Rx1(UART1) for CRSF protocol Receiver
  • Tx2/Rx2(UART2) for GPS/firmware update/setting parameters
  • 1~10: CH1~CH10 PWM outputs
  • Curr: current sensor signal (0~3.3V)
  • Vbat: Battery voltage sensing (0~36V)
  • G: ground
  • 4v5 pad voltage = 5V pad voltage -0.3V,  make sure the voltage on 5V pad is not higher than receiver and GPS rated voltage.


  • Failsafe value is set automatically after CRSF-PWM board is powered on and receive CRSF signal. LED blinks 8 times quickly.
  • Failsafe value = The PWM value of each channel(except CH3) when CRSF signal is received by CRSF-PWM board for the first time
  • CH3 is specially arranged for the throttle,  Failsafe value = 988 by default.
  • Usually put the Throttle  joystick to the lowest point,  put AIL(Roll), ELE(Pitch), RUD(Yaw) middle before powering on receiver.

LED status

  • slow blinks: CRSF-PWM board doesn’t receive CRSF signal, e.g., receiver is not bound with transmitter, receiver is not connected to UART1 of CRSF-PWM board.
  • 8x quick blinks: CRSF-PWM board received CRSF signal and failsafe value is saved.
  • solid ON:  CRSF-PWM board and receiver are working normally
  • 2x slow blinks between 8x fast blink and solid on: CLI mode is active

GPS telemetry

  • Compatible with GPS NMEA protocol
  • GPS “TX” to CRSF-PWM board “RX” Single wire half duplex UART connection,   CRSF-PWM board “TX” to GPS “RX” is not essential.
  • Support GPS Telemetry ID: GPS, GSpd, Hdg, Alt, Sats
  • u-blox series GPS can output “0+1 – UBX+NMEA” protocol by default
  • Sensors(GPS, GSpd, Hdg, Alt, Sats) will blink in Transmitter TELEMETRY tab once CRSF-PWM board has connection with GPS.
  • Troubleshooting for no GPS telemetry,  double check the wiring between GPS and CRSF-PWM board,  some u-blox GPS may don’t output NMEA protcol, you need to be reverted GPS to default configuration in u-center.
  • with OpenTX Telemetry Logging, You can plot your flight path or search the lost plane.

TIM & PWM Frequency

  • PWM frequency on all 10x Channels can be configured according to TIM
  • PWM run at 50Hz by default
  • TIM2:  CH1, CH2, CH4
  • TIM16: CH3
  • TIM3:  CH5, CH6, CH7, CH8
  • TIM1:  CH9, CH10

CLI mode

  • If CRSF-PWM board doesn’t detect GPS connected to UART2 within 10 seconds after powering on,  CLI mode will active.
  • After CLI mode is active, CRSF-PWM board can be connected to configurator via USB-TTL module/FC passthrough.
  • in CLI mode, CRSF-PWM board firmware can be updated
  • CLI mode has no effect to receiver CRSF signal and PWM outputs


  • 1 x CRSF-PWM-C
  • 1 x low ESR capacitor
  • 1 x Dupont 2.54 pins