Matek AP_Periph CAN Node L431
by Matek Systems

The Matek AP_Periph CAN Node L431 is a powerful DroneCAN adapter node designed to expand ArduPilot-supported peripherals via the DroneCAN bus. Built around the STM32L431xC MCU (256KB Flash), this module enables seamless conversion of GNSS, compass, barometer, airspeed sensors, and GPIO-based peripherals to DroneCAN-compatible devices.

With high-speed CAN communication (up to 1 Mbit/s), multiple UART, I2C, SPI, and ADC interfaces, and 5 PWM outputs, the CAN-L431 is ideal for customizing and optimizing UAV and drone systems. This module supports ArduPilot AP_Periph firmware and can be easily updated via the DroneCAN GUI Tool.

Designed for reliable performance in extreme conditions (-20°C to 80°C), the CAN-L431 is a must-have for advanced drone builders, UAV enthusiasts, and developers looking to integrate high-precision peripherals into a robust CAN network.

Specifications:

Core Features:

• MCU: STM32L431xC (256KB Flash)
• DroneCAN Protocol: 1x CAN bus (2x JST-GH-4P connectors)
• CAN Transceiver: Up to 1 Mbit/s

Interface & Connectivity:

• 3x UART Ports:
  • UART1: Spare
  • UART2: MSP default, DFU
  • UART3: GPS default
• 1x I2C Port:
  • Supports airspeed sensors, barometers, and compass (QMC5883L)
• 1x SPI Port:
  • Supports RM3100 magnetometer
• 4x ADC Inputs:
  • BATT_VOLT (Pin 5), BATT_CURR (Pin 6)
  • BATT2_VOLT (Pin 15), BATT2_CURR (Pin 16)
• 5x PWM Outputs
• 1x GPIO: TIM16 for buzzer/LED notifications
• ST Debugging Ports: SWCLK & SWDIO

Power & Environmental:

• Input Voltage: 4.5V – 5.5V (via 5V pad/pin)
• Power Consumption: 40mA
• Operating Temperature: -20°C to 80°C

LED Indicators:

• Blue (Fast Blink): Booting
• Blue (Slow Blink): Working
• Red LED: 3.3V Power Indicator

Physical Dimensions & Package Contents:

• Board Size: 26mm x 26mm x 6mm
• Weight: 3.7g
• Included Accessories:
  • 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

Firmware & Compatibility:

• Firmware: ArduPilot AP_Periph (MatekL431-Periph or MatekL431-Airspeed)
• Update Method: DroneCAN GUI Tool
• 3D Model: Available (CAN-L431_STEP.zip)