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Rembrandt is an embedded Linux processor based on the AVR32 AP700 and packaged in the Stamp form factor. It's the first of Tom's series of “Network Toys”.

• 32 Meg SDRAM
• 32 Meg FLASH
• Removable FLASH Media (SD card)
• 10/100 Ethernet onboard
• USB port

Rembrandt first boots the U-boot boot loader stored in parallel FLASH. The boot loader initializes the CPU, sets up the clock and initializes external SDRAM. It then loads the Linux kernel from the SD card and executes it.

This board lacks everything. There are no cables, hookup diagrams or even what to expect where. I watched the video and found that the Linux boot comes out of the DB9 232 port. I had a cable on the USB.

Connect a serial port to the DB9 connector on the NGW100 board with a straight serial cable (not a null modem cable). Open the comm software, select 115200,8,N,1,No Flow Control, and set up the terminal emulation as VT100.

The NGW100 has 2 ethernet ports. They are labeled LAN and WAN. Linux port eth0 is the WAN port and eth1 is the LAN port. They should have labeled this eth0 and eth1.

The default configuration for the NGW100 is to have eth0 attempt to seek a DHCP assigned address at start up, if it cannot find a DHCP server it will fall back to the address, 10.11.12.1

The LAN port, eth1, will default to an address of 10.0.0.1

To display the IP addresses that have been assigned to the NGW100 ethernet ports use the 'ifconfig' command.

   "ifconfig -a"

This will display information for both “eth0” and “eth1” as well as “lo”, the ethernet loopback port.

The NGW100 can be configured with a Static IP. The process is to shutdown the ethernet port, start it up again with a new IP and then add an entry in the routing table to the network's gateway. The last step is so the NGW100 will be able to see the Internet via the router.

To change the IP of eth1 use ifconfig.

To shutdown eth1 the command is:

   "ifconfig eth1 down"

To start it back up with an new IP of 192.168.1.37 the command is:

   "ifconfig eth1 192.168.1.37 netmask 255.255.255.0 up"

To confirm that eth1 has the new address the command is:

   "ifconfig -a eth1"

Rembrandt will contain a data logger which will record current data in a Round Robin Database (RRD). Open source RRD software writes data to an RRD and displays it in charts as well as fetches it for archiving to disk. See Tom's RRD notes.