Low Cost Node Overview¶
The low cost node consists of an ALIX 2c2 or similar board from PCEngines http://pcengines.ch/order1.php?c=4, together with a Power-over-ethernet adaptor that can extract the 48V supply from PoE and convert it to 12V to power the board.
Suitable adaptors are:
- Silver Telecom PA1212 (tested at NICTA)
- Linksys DLW-P50 http://www.dlink.com.au/products/?pid=368 (tested at NICTA)
- Linksys WAPPOE12 - http://www.voiplink.com/Linksys_WAPPOE12_p/linksys-wappoe12.htm (NOT tested at NICTA)
Linksys PoE switch automation.¶
How to automate the control of PoE power via Linksys SRW208MP: PoE
Power Consumption: ALIX 2c2 + one CM9 wifi card + Silver Telecom adaptor:¶
- PA1212 PoE adaptor by itself (no load): 1.4 Watts
- CPU 100%, one CM9 not running: 6.2W
- CPU idle, CM9 running (scanning): 5.3W
- CPU 100%, one CM9 scanning: 7.1W
Therefore it seems that the IEEE PoE standard 15.4W could easily supply this node, possibly with 2 CM9 cards.
