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:
