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On this page
  • Connectors
  • Pinouts
  • USB (J1)
  • Ethernet (J2)
  • Power (J51)
  • Recovery Procedure
  • Loading default pre-paired configuration
  • Configuration Files
  • Wiring during Configuration
  • Factory Reset
  1. Hardware Integration
  2. Skynode
  3. Peripherals

Data Link Module

PreviousPixhawk Payload BusNextPX4 F9P GPS

Last updated 3 months ago

The Microhard Data Link is not for sale anymore.

This page contains the relevant documentation for existing Microhard Data Links deployed in the field.

The Data Link Module is designed to evaluate the Microhard pMDDL2450 radio as a telemetry, control and video link. Other Microhard radios may work similarly, but are not officially supported by the Auterion Pairing Manager at this time.

Connectors

ID

Name

Connector

Description

J1

USB

USB Type-C

pMDDL USB interface (pins 18 and 19)

J2

Ethernet

JST GH 4-pin

SM04B-GHS-TB

pMDDL LAN interface (pins 55 to 58), 100Base-T

J3

UART

JST GH 6-pin

SM06B-GHS-TB

pMDDL Serial interface (pins 28, 29, 31 and 34)

J51

POWER

Molex Micro-Fit 3.0 0436500210

Power supply input, 6.4V - 30V

Antenna

RP-SMA

Fan

JST GH 2-pin

5V connector to attach a fan for cooling

Pinouts

USB (J1)

Please refer to the official pinout specification for USB Type-C connectors. The connector supports USB High-Speed (up to 480 MBit/s) data rates.

Ethernet (J2)

This interface supports 100Base-T ethernet which can carry speeds up to 100MBit/s

Pin

Name

Dir

Lvl

Function

1

ETH_TD_P

OUT

3.3V

Transmit + (Diff.)

2

ETH_TD_N

OUT

3.3V

Transmit - (Diff.)

3

ETH_RD_P

IN

3.3V

Receive + (Diff.)

4

ETH_RD_N

IN

3.3V

Receive - (Diff.)

UART (J3)

Pin

Name

Dir

Lvl

Function

1

NC

Not connected

2

RXD

IN

3.3V

pMDDL RXD

3

TXD

OUT

3.3V

pMDDL TXD

4

RTS

IN

3.3V

pMDDL RTS

5

CTS

OUT

3.3V

pMDDL CTS

6

GND

Ground

Power (J51)

Pin

Name

Dir

Lvl

Function

1

GND

Ground

2

VIN

6.4V - 30V

Power Input

Recovery Procedure

The radio modules included in the Skynode Evaluation Kit are already configured and in a pre-paired state, no further configuration is required. The following steps can be used to recover the factory pre-paired state or to configure a set of Microhard modules that is not already setup.

Loading default pre-paired configuration

After completing the recovery procedure below, the password to the Microhard's web interface will be "auterionfct".

  1. Verify that the Ethernet port of the computer or laptop is configured as a DHCP client.

  2. Wait until the Ethernet connection is established and an IP address has been assigned.

  3. After logging in change the admin password as requested. This password will be overwritten again when we load the configuration file in the next step.

  4. In the Microhard web interface, navigate to System > Maintenance and under Restore Configuration click Choose File. Select the correct configuration file from the previously downloaded archive and upload it.

  5. Click on Check Configuration File.

  6. Repeat the same process for the second unit. pairing will only work if both AIR and GROUND unit have their respective configuration loaded!

Configuration Files

Wiring during Configuration

Factory Reset

  1. Power the Microhard using the power module and the wall power supply or a battery.

Connect the radio module to your computer or laptop following the below and power on the module. Even when you need to recover both radio modules, connect only one of them at a time and repeat this procedure afterwards for the other module.

Reset the radio module to factory defaults following the instructions under .

Open your internet browser and navigate to the following URL: . This connects to the radio module's local web interface. The default login is Username: admin Password: admin

For your convenience we are providing configuration files for the Microhard Radios. Download the . The archive contains two configuration files, one for the AIR unit and one for the GROUND unit. The AIR unit is the module that is typically connected to Skynode, and the GROUND unit is typically connected to your desktop computer or laptop.

After the configuration has been verified successfully click Restore and wait until the update is complete. This step also changes the configuration password to "auterionfct". You must change it back to "admin", even if the configuration GUI complains about it.

The modules have to be configured as AIR and GROUND unit afterwards. One method for doing so is .

Wait until the Microhard is fully booted. Booting takes about 60-75 seconds, and is complete when the three RSSI LEDs (D7,D8 and D9) indicated below start lighting up in a "walking sequence" (i.e. LEDs are active one after another, in a continuous cycle). ​

Press and hold the Config Button by inserting a pointy tool such as a paper clip. Once the CPU Status LED begins to flash, keep pressing the button for more than 10s. The module will reboot after you release the button, this takes again about 60-75 seconds. ​ The module is now reset and can be configured for the use with Skynode. You must configure it to be an AIR or GROUND unit now by prior to being able to use it.

http://192.168.168.1/
wiring diagram
Factory Reset
configuration files
explained above
loading the configs
12MB
Data-Link-Module.stl
3D model
305KB
Data-Link-Mechanical-drawing.pdf
pdf
Mechanical drawing
32KB
MicrohardpMDDL2450-PRE-PAIRED-PW-auterionfct.zip
archive
Microhard pMDDL2450 pre-paired configs