Höjdens maximala yttermått var 57 cm varav lådan byggdes med den höjden. Fick rekommendation av hifikit att bredden skulle vara smal, varav frampanelen gjordes med en bredd på 24 cm.
Djupets storlek räknades ut enligt nedan:
Steg 1: Uppgradering av högtalarelement i befintlig låda.
Högtalarlåda:
Dimensioner för lådan:
| Namn | Mått (cm) |
| Bashål | 8” |
| Lilla diskanten | 7,5 ; 0,7 kant |
| Stora diskanten | 9,7 ; 1 kant |
| Höjden | 49,5 |
| Bredden | 24,5 |
| Djupet | 30 |
| Volymen: H[dm]*B[dm]*D[dm] = dm^3 | 4,95*2,45*3,0 = 36.3825 liter. (yttermått räknat) |
Continue reading Steg 1: Uppgradering av högtalarelement i befintlig låda.
A new project idea: IoT sync
I’ve created a program for handling data for IoT devices. It is php-based and uses mysql, ssh and rsync.
http://www.exclude.se/KTH/IoT_sync.pdf
https://github.com/payano/IoT_sync
OpenBSD – easier management
https://stable.mtier.org/
EUMT – Easier Unix Management Tool
I recently started a new project and published it as an BSD licence in github.
The link is here
netgear router, no internet – reboot.
Script to check if the netgear router is working:
[root@srv01 ~]# crontab -l
#starta om netgear router om det är problems
*/15 * * * * /opt/scripts/reboot.sh >> /dev/null 2>&1
#!/bin/bash
ping 8.8.8.8 -c2
if [[ $? -gt 0 ]];
then
URL=$(curl -u USERNAME:PASSWORD "http://192.168.1.1/LAN_lan.htm" 2>&1 | grep 'method="POST"' | awk {'print $4'} | grep -oE "lan.*\"" | sed 's/"//g')
POSTDATA="device_name=WNR3500L&sysLANIPAddr1=192&sysLANIPAddr2=168&sysLANIPAddr3=1&sysLANIPAddr4=1&sysLANSubnetMask1=255&sysLANSubnetMask2=255&sysLANSubnetMask3=255&sysLANSubnetMask4=0&rip_direction=1&sysRIPVersion=Disabled&dhcp_server=dhcp_server&sysPoolStartingAddr4=100&sysPoolFinishAddr4=254&select=-1&action=Apply&lan_ipaddr=192.168.1.1&lan_netmask=255.255.255.0&rip_enable=0&rip_multicast=1&rip_version=2&lan_proto=dhcp&dhcp_start=192.168.1.100&dhcp_end=192.168.1.254&dhcp_start_old=192.168.1.100&dhcp_end_old=192.168.1.254&pptp_wan_ipaddr=...&l2tp_wan_ipaddr=...&pppoe_wan_ipaddr=...&pptp_serv_ipaddr=10.0.0.138&l2tp_serv_ipaddr=10.0.0.138&wan_proto=dhcp&wan_ipaddr=213.114.124.94&wan_netmask=255.255.240.0&repeater=0&repeater_an="
echo "need to restart the router..."
curl -u USERNAME:PASSWORD -d $POSTDATA http://192.168.1.1/$URL
EMAILMESSAGE="/tmp/emailmessage.txt"
echo "REBOOTED Router"> $EMAILMESSAGE
/bin/mail -s "Rebooted Router" "root@localhost" < $EMAILMESSAGE
rm -rf $EMAILMESSAGE
echo "$(date +'%Y-%m-%d %H:%M:%S') NEED TO REBOOT ROUTER!" >> /root/reboot.log
#echo "$(date +'%Y-%m-%d') NEED TO REBOOT ROUTER!" >> /root/reboot.log
else
echo "everything works..."
fi
Projectcourse first year.
The Project that the group has been working on is finally over and here is the results:
http://exclude.se/KTH/KTH_best.jpg
http://exclude.se/KTH/Slutrapport_KTH_arskurs1.pdf
http://exclude.se/KTH/1min.avi
http://exclude.se/KTH/3min.mp4
Back to OpenBSD
I reinstalled my harddrive and installed OpenBSD once again.
After that I noticed that OpenBSD now supports tmpfs, so i mounted tmp and .cache directory in ram instead:
$ cat /etc/fstab
c62268885862ee35.b none swap sw
c62268885862ee35.a / ffs rw 1 1
c62268885862ee35.g /home ffs rw,nodev,nosuid,noatime 1 2
#c62268885862ee35.d /tmp ffs rw,nodev,nosuid,noatime 1 2
c62268885862ee35.f /usr ffs rw,nodev,noatime 1 2
c62268885862ee35.e /var ffs rw,nodev,nosuid,noatime 1 2
tmpfs /tmp tmpfs -m777,rw,nodev,nosuid,noatime 0 0
tmpfs /home/johan/.cache tmpfs rw,nodev,nosuid,noatime 0 0
Wpa_supplicant + FreeBSD + Eduroam
Download this: http://www.lan.kth.se/eduroam/AddTrust_External_CA_Root.pem
Edit wpa_supplicant.conf:
network={
ssid=”eduroam”
key_mgmt=WPA-EAP IEEE8021X
eap=TTLS
identity=”username@kth.se”
anonymous_identity=”username@kth.se”
password=”password”
ca_cert=”/usr/local/share/certs/eduroam.pem”
phase2=”auth=PAP”
}
Code for the project presentation
Code for the project presentation:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#define TEXTER 4
char texten[TEXTER][255] = {
"Wake up, Matrix...",
"They are coming...",
"Follow the room edges...",
"Knock knock Matrix..."
};
int main(void){
int i,j = 0;
for(i=0;i < TEXTER;i++)
{
j = 0;
while(texten[i][j] != 0)
{
printf("%c", texten[i][j]);
fflush(stdout);
usleep(300000);
j++;
}
usleep(2000000);
printf("\n");
fflush(stdout);
}
}
}