Posts from 2014-03
The Raspberry Pi colocation costs 36 EUR incl. VAT per year, see here. If you spend this amount of money for energy only, it's:
Yearly Energy = 36 EUR/year / 0.27 kWh/EUR * 1000 Wh/kWh = 133 333 Wh / year # to enter it more quickly in your calculator: 36...
ip addr su ethtool enp1s0f0 ethtool enp1s0f1 ethtool -s enp1s0f0 wol g ethtool enp1s0f0
g or the other options mean is stated here (source):
p Wake on phy activity
u Wake on unicast messages
m Wake on multicast messages
b Wake on broadcast messages
a Wake on ARP
If you encounter problems like these:
dhcpcd: eth0: broadcasting for a lease dhcpcd: eth0: offered 192.168.1.64 from 192.168.1.1 dhcpcd: eth0: reject NAK via 192.168.1.1
Online you will find a lot of old threads suggesting things like commenting out the line
require dhcp_server_identifier in the file
dhcpcd.conf. Didn't help in my case.
The width of 19" equipment is obviously
19 inches = 482.6 mm. However, the question is: what distance is that?
Wikipedia helps us: The 19 inch are "including edges or ears that protrude on each side which allow the module to be fastened to the rack frame". So for...
This blog post describes my project to control a cheap wireless power switch from the German electronics distributor Pollin (Funksteckdosen-Set mit 3 Steckdosen, order no. 550666, 9,95 €) via the Arduino / the RPi.
How The System Works
It uses the common chip HX2262. The RF module sends on 433.92 MHz.