MATEK Mateksys CRSF TO PWM CONVERTER CRSF-PWM-6 / CRSF-PWM-C For CRSF Protocol Receiver TBS Crossfire Nano SE

CRSF-PWM Converter, CRSF-PWM-6

• Compatible with CRSF protocol receiver only
• 6x PWM outputs
• PWM frequency configurable (50Hz default, 100,160,330, 400Hz)
• 2x UARTs (for Receiver and GPS)
• Telemetry ID: RxBt, Curr, Capa, Bat%, GPS, GSpd, Hdg, Alt, Sats
• 36V Max. battery voltage sense (1K:10K voltage divider built-in)
• Compatible with external Current sensor (0~3.3V)
• Vbat and Current sensor scale configurable
• Failsafe value auto set
• Firmware upgradeable
• Rated voltage: 4~9V @5V pad, 0~36V @Vbat, 0~3.3V @Curr
• No 5V regulator built-in
• 25mm x 16mm, 1.3g
• Packing: 1x CRSF-PWM-6, Dupont 2.54 pins

CRSF-PWM Converter, CRSF-PWM-C

• Compatible with CRSF protocol receiver only
• 10x PWM outputs
• PWM frequency configurable (50Hz default, 100,160,330, 400Hz)
• 2x UARTs (for Receiver and GPS)
• Telemetry ID: RxBt, Curr, Capa, Bat%, GPS, GSpd, Hdg, Alt, Sats
• 36V Max. battery voltage sense (1K:10K voltage divider built-in)
• Current sensor built-in (90A continuous /220A Peak),  current scale = 150 by default
• Vbat and Current sensor scale configurable
• Failsafe value auto set
• Firmware upgradeable
• Rated voltage: 4~9V @5V pad, 0~36V @BAT+
• No 5V regulator built-in
• 26mm x 26mm, 2.8g
• Packing: 1x CRSF-PWM-C,  1x low ESR capacitor,  Dupont 2.54 pins

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

• 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.

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