Matek AP_Periph CAN-L4-BM Digital Power Monitor


SKU: BS040-118 Categories: ,


The Matek AP_Periph CAN-L4-BM CAN Digital Power Monitor offers ultra-precise monitoring for your drone needs. It features a low-power resistant path of 200μΩ, providing high efficiency in power consumption. No calibration is required and DroneCAN protocol offers convenient current & bus voltage readouts. Enjoy precision monitoring and convenience with the AP_Periph CAN CAN-L4-BM.

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  • MCU: STM32L431xC, 256KB Flash
  • INA239 85-V, 16-Bit, High-Precision Power monitor IC With SPI Interface
  • Battery Voltage sense input: 0~85V
  • Current Sense Range: 0~204.8A
  • Load current on current sensing resistor: 150A(Continuous), 204.8A(Burst)
  • Voltage accuracy: ± 0.1%
  • Current accuracy: ± 2%
  • Interface: CAN, DroneCAN Protocol, U-ART2, spare, DFU, -ST debug, SWCLK & SWDIO
  • LED: Blue, (Fast blinking, Booting), Blue, (Slow blinking, working) Red, (3.3V indicator)
  • Power supply for CAN-L4-BM board: 4.5~5.5V @5V pad/pin
  • Power consumption: 10mA
  • Operating Temperatures: -40~85 °C
    Board Size: 30mm x 22mm x 3mm.
  • Weight: 4g
  • 3D file:
  • Firmware: ArduPilot AP_Periph  MatekL431-BattMon
  •  Update: via DroneCAN GUI Tool
  • Parameters: CAN_P1_DRIVER = 1 if attached to CAN bus1 port or CAN_P2_DRIVER = 1 if attached to CAN bus2 port, BATTx_MONITOR = 8 (DroneCAN-BatteryInfo)


  • The big pad on the bottom side is a dead pad. No any circuit network on it.
  • Solder the positive wires as close as possible to both sides of the current sensing resistor.
  • 2 ears for mounting can be cut off if you don’t need it.
  • If the CAN wires are too long, bridge the “120R” jumper.


  • 1x Matek AP_Periph CAN-L4-BM Digital Power Monitor
  • 1x JST-GH-4P to JST-GH-4P 20cm silicon wire

Additional information

Weight 0.05 kg


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