utilize the ArduPilot driver library to convert ArduPilot supported GNSS, Compass, Barometer, Airspeed sensor, and GPIO based (PWM, Buzzer/LED notify) peripherals to DroneCAN bus peripherals. This act as a hub between your sensors and the flight controller. This is ideal for some smaller flight controllers that do not have as much I/O.

Specifications
MCU: STM32L431xC, 256KB Flash
CAN transceiver data rates up to 5 Mbit/s in the CAN FD fast phase
1x CAN, DroneCAN Protocol (2x GH-4P connectors in parallel)
3x UARTs
UART1, spare
UART2, MSP default, DFU
UART3, GPS default
1x I2C
for peripheral Airspeed sensor
for peripheral Barometer
for peripheral Compass QMC5883L
1x SPI
for peripheral RM3100
4x ADC
BATT_VOLT, PIN 5
BATT_CURR, PIN 6
BATT2_VOLT, PIN 15
BATT2_CURR, PIN 16
5x PWM outputs
1x GPIO with TIM16 for buzzer
ST debug, SWCLK & SWDIO
LED
Blue, Fast blinking, Booting
Blue, Slow blinking, working
Red, 3.3V indicator
Input voltage range: 4.5~5.5V @5V pad/pin
Power consumption: 40mA
Operating Temperatures: -20~80 C
Physical
2x JST-GH-4P(SM04B-GHS-TB) for CAN
1x JST-GH-4P(SM04B-GHS-TB) for I2C
1x JST-GH-6P(SM06B-GHS-TB) for UART3+I2C
Board Size: 26mm*26mm*6mm. 3.7g
3D file : CAN-L431_STEP.zip
Firmware
ArduPilot AP_Periph MatekL431-Periph, or MatekL431-Airspeed
Update via DroneCAN GUI Tool

Packing
1x CAN-L431 board
1x JST-GH-4P to JST-GH-4P 20cm silicon wire
1x JST-GH-6P to JST-GH-6P 20cm silicon wire