We have a need for a low power OpenBSD device or handheld that can connect
to a small SCADA device (serial or USB) to collect some temperature and
voltage data, plus control one light switch, on a remote solar powered
wifi repeater tower.
Any suggestions on the lowest powered OpenBSD runnable box we can expect
to find for such a job, one that we can connect to the repeater by
ethernet, or even wireless?
Austin
it happens i just got a Soekris 4501 3rd hand, set it on the coffee table,
and plugged it into a 'Kill A Watt[0]' recently. the KAW said i had the
Soekris plugged in for 45 hours and 43 min. during that time i compiled a
gopher server (so?!), regenerated some SSH keys, ran MD5 -t a few times,
and just generally messed around and configured it over SSH (while
concurrently running a serial console). the KAW read 2 watts power draw
during normal (mostly idle) use, and peaked at 5 watts when i ran md5 -t.
over the 45h43m period the KAW read 0.12kWh drawn. if my math is correct,
120Wh/(45h+(43m/60(m/h))), this suggests it drew ~2.6 watts on average
over the entire ~45.72 hour period of what i would call normal usage (and
all while gopher serving, thankyouverymuch :p ).
[0] http://www.p3international.com/products/special/P4400/P4400-CE.html
[1] i should probably note the power supply used is some 'CUI Stack
DPD120080-P5' wall wart thing, i have no idea if that's what they normally
ship with or not. i would hazard to guess the efficiency of the thing is
less than stellar.
OpenBSD 4.1-current (GENERIC) #161: Tue May 15 12:32:03 MDT 2007
[EMAIL PROTECTED]:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: AMD Am5x86 W/B 133/160 ("AuthenticAMD" 486-class)
cpu0: FPU
real mem = 66678784 (65116K)
avail mem = 52084736 (50864K)
using 844 buffers containing 3457024 bytes (3376K) of memory
mainbus0 (root)
bios0 at mainbus0: AT/286+ BIOS, date 20/70/26, BIOS32 rev. 0 @ 0xf7840
pcibios0 at bios0: rev 2.0 @ 0xf0000/0x10000
pcibios0: pcibios_get_intr_routing - function not supported
pcibios0: PCI IRQ Routing information unavailable.
pcibios0: PCI bus #0 is the last bus
bios0: ROM list: 0xc8000/0x9000
cpu0 at mainbus0
pci0 at mainbus0 bus 0: configuration mode 1 (bios)
elansc0 at pci0 dev 0 function 0 "AMD ElanSC520 PCI" rev 0x00: product 0
stepping 0.1, CPU clock 133MHz, reset 40<SCP>
gpio0 at elansc0: 32 pins
sis0 at pci0 dev 18 function 0 "NS DP83815 10/100" rev 0x00, DP83815D: irq
10, address 00:00:24:c0:xx:xx
nsphyter0 at sis0 phy 0: DP83815 10/100 PHY, rev. 1
sis1 at pci0 dev 19 function 0 "NS DP83815 10/100" rev 0x00, DP83815D: irq
11, address 00:00:24:c0:xx:xx
nsphyter1 at sis1 phy 0: DP83815 10/100 PHY, rev. 1
sis2 at pci0 dev 20 function 0 "NS DP83815 10/100" rev 0x00, DP83815D: irq
5, address 00:00:24:c0:xx:xx
nsphyter2 at sis2 phy 0: DP83815 10/100 PHY, rev. 1
isa0 at mainbus0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard
wdc0 at isa0 port 0x1f0/8 irq 14
wd0 at wdc0 channel 0 drive 0: <ELITE PRO CF CARD 2GB>
wd0: 1-sector PIO, LBA, 1983MB, 4061232 sectors
wd0(wdc0:0:0): using BIOS timings
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
spkr0 at pcppi0
npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16
pccom0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
pccom0: console
pccom1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
biomask f3c5 netmask ffe5 ttymask ffe7
pctr: no performance counters in CPU
dkcsum: wd0 matches BIOS drive 0x80
root on wd0a swap on wd0b dump on wd0b
^--there really is no wd0b
