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Rappidly integrate a compact CAN enabled STM32 processor

Micro Node

The Beyond Robotix Micro Node allows you to create production grade PCBs without needing to worry about the complicated bit. Put the board to board connector on your project, wire in a sensor, a connector and now you have a CAN enabled project.

We do Quality Assurance and software upload, meaning you just have to screw the board down to your project.

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LogoMicro CAN NodeBeyond Robotixchevron-right
LogoMicro CAN Node Development setBeyond Robotixchevron-right

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Specifications

  • Dimensions: 26 x 20 mm

  • Mass: 2.2 g

  • Power Consumption: 30 mA (40 mA peak) at 5V

  • STM32L431CCU6 Processor with 256 KB of flash

  • 200mA LDO

  • Short Circuit Protection - 1 A Input Fuse

  • Reverse Polarity Protection - Input Diode

  • Optional 120 ohm termination resistor via solder pad

  • Status LED

  • High reliability connector & mechanical fixing

  • Screw heads accessible from the top of the board

  • AP periph firmware support

  • Arduino DroneCAN support

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Pinout

The Micro Node requires the DF40C-80DS-0.4V(51) connector to be on the carrier board.

LogoHirose Electric DF40C-80DS-0.4V(51)Mouser Electronicschevron-right
CAN node carrier board connector
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The equivalent JLCPCB component is C312960

The footprint can be downloaded from the mouser page. Be sure to use this one! Pin numbers can be different on different footprints for the same part. We learnt the hard way.

Footprint pinout mapping. 1 bottom right, 2 top right.

You'll notice our connector has far many more pins than the STM32 has outputs, we've chosen this due to stock availability, as well as we'll be able to use this same connector on future projects on STMs with higher pin counts.

Pin Number
AP_Periph function
STM/Physical

1

GND

2

GND

6

+3.3V

7

CAN_H

9

CAN_L

15

+5V

16

+5V

32

PB12

33

USART3_RX

PB11

34

SCL

PB13

35

USART3_TX

PB10

36

SDA

PB14

37

SPI1_CS2

PB2

38

PB15

39

PB1

40

PA8

41

PB0

42

PA9

43

SPI1_MOSI

PA7

44

PA10

45

PA6

46

PA11

47

SPI_SCK

PA5

48

PA11

49

SPI_CS1

PA4

50

SWD

PA13

51

USART2_RX

PA3

53

USART2_TX

PA2

55

PA1

57

PA0

59

NRST

66

SWC

PA14

68

PA15

70

SPI1_MISO

PB4

72

PB5

74

USART1_TX

PB6

76

USART1_RX

PB7

78

BOOT0

79

GND

80

PC13

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Standoffs

The design requires 4x M1.6, 1.5mm standoffs. An example of these is the 9774015633R from Wurth Electronik.

LogoWurth Elektronik 9774015633RMouser Electronicschevron-right
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The equivalent JLCPCB component is C2928168

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Connector position drawing

This drawing is for the hole and connector positions for the carrier board, not the node itself.

Layout with Dimensions
Example layout on Node Development Board V1.0

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Template

A Kicad template file with required libraries can be used as a starting point to make a custom carrier board.

file-archive
246KB
Micro Node Carrier Template Rev A.zip
archive
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Software

Arduino DroneCAN

We wrote an Arduino library for using DroneCAN on this Node out of the box!

You can integrate your sensor how you like with minimal code. Includes bootloader support so your apps can be updated over CAN.

binaryArduino DroneCANchevron-right

AP_Periph

We support AP_Periph based firmware's for our CAN node. The Nodes ship with a generic AP_periph firmware by default.

robot-astromechAP Periphchevron-right

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Custom Firmware

We can flash a custom/specific firmware for your order on your request. Contact us for custom firmware to be written at admin@beyondrobotix.com

We have experience integrating virtually every type of sensor into communicating with Ardupilot or PX4, for example fuel flow sensors, ultrasound sensors, GNSS receivers, magnetometers, pressure transducers, power monitors and many more. It is also possible to adapt the output of the Micro Node to send PWM, GPIO, CAN, Serial, I2C and SPI.

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Environmental

Based on environmental ratings for the components and board manufacturer statements. Not a tested figure by Beyond Robotix.

The boards can be conformally coated on request. If environmental considerations are a requirement for your project, contact us at admin@beyondrobotix.com for further insight and options.

  • Temperature > -20 °C to 85 °C ambient temperature

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QA Testing

We test every board we dispatch. Our process is:

  • Mount the node to a test carrier

  • Upload testing firmware

  • Our software checks every pin is functioning as expected

  • Upload customer firmware

  • Check node status can be seen through CAN interface (if applicable)

  • Package for dispatch

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