Maxx GW4100

The Device

Linux login

Per default login to the Linux system is possible by the use of a ssh connection on eth0 or via the serial console on the RS232 interface (115.200 baud, 8N1).

login: root

password: root

Please be advised to at least change the password and deactivate the serial console before deploying the device. The use of further security measures (PSK etc.) is strongly encouraged.

Interfaces

The following section describes the various interfaces of the GW4100 in detail. This graphic shows the distribution of the interfaces:

((ABB))

Power

The device requires an external ES1/PS2 DC power supply 8-30V, 25W.

Ethernet

10/100MBit ethernet interface, per default configured as DHCP server with IP address 192.168.1.1.

USB

USB 2.0 host interface for connection of external USB devices. Please note that an appropriate Linux driver ist required for many devices.

SD card

Micro SD card interface for adding additional non-volatile memory to the system. Please use a SD card to store rapidly changing data (e.g. databases etc.) as the internal flash memory allows limited write cycles before potential memory corruption may occur.

CAN

The interface according to the CAN 2.0B protocol specification is relaized using the i.MX7D’s flexcan interface and a NXP TJA1051 transceiver. It features a switchable 120R termination resistor.

On the Linux side a SocketCAN interface (can0) with a default bitrate of 250.000 bit/s is provided.

The termination resistor is activated by driving CAN_TERM_EN_n low. See Linux mapping for details.