NITLAB designed and implemented a Chassis Manager(CM) card to control and monitor NITOS nodes. CM card is comprised of a general-purpose microcontroller, an ethernet microcontroller and a relays circuit. General-purpose microcontroller supports a tiny web server and can serve http requests such as power on/off and reset. Furthermore, it returns the operation status of the node and can support a temperature & humidity sensor and a light sensor as well.

It should be highlited that the developed CM Card is based on the open-source AVR microcontroller board provided by tuxgraphics. Tuxgraphics also provides a basic firmware with a WebServer implementation through which is feasible to control remotely microcontroller's I/O pins.

You can watch a demonstration video here.

Prototype Technical Information:

• AVR micro-controller ATmega328P
• Ethernet Controller with SPI Interface ENC28J60
• Ethernet Magjack
• 2 reed relays
• CM card's firmware

 

 

Relays Circuit Schematic (designed and implemented by NITlab):

 

This circuit is been implemented on the empty edge of CM card and is been connected with the microcontroller.

 

Microcontroller Circuit Schematic (as provided by tuxgraphics):

 

 

 

 

Temperature & Humidity sensor:

 

Light sensor:

 

 

 

 

More photos: