{"id":187,"date":"2009-08-11T10:04:00","date_gmt":"2009-08-11T10:04:00","guid":{"rendered":"http:\/\/aldarias.es\/wordpress\/?p=187"},"modified":"2009-08-11T10:04:00","modified_gmt":"2009-08-11T10:04:00","slug":"medir-el-nivel-de-senal-wireless","status":"publish","type":"post","link":"http:\/\/aldarias.es\/wordpress\/?p=187","title":{"rendered":"Medir el nivel de se\u00f1al wireless"},"content":{"rendered":"

\"\"<\/a>
Debido a que no me llegaba la se\u00f1al wireless, me puse a mirar como medirla, y adem\u00e1s de forma num\u00e9rica en %.
La versi\u00f3n de linux es ubuntu 8.1.<\/p>\n

uname -a
Linux laurita 2.6.27-14-generic #1 SMP Wed Jul 29 09:01:45 UTC 2009 i686 GNU\/Linux<\/p><\/blockquote>\n

La tarjeta wireless es Intel<\/p>\n

lspci | grep Wireless
03:00.0 Network controller: Intel Corporation PRO\/Wireless 3945ABG [Golan] Network Connection (rev 02)<\/p><\/blockquote>\n

Podremos ver la calidad de la se\u00f1al es 47 siendo la m\u00e1xima de 70:<\/p>\n

sudo iwconfig eth1 | grep Quality
Link Quality=47\/70 Signal level=-63 dBm Noise level=-127 dBm<\/p><\/blockquote>\n

Podemos verlo de forma num\u00e9rica, aparece como 50 aqu\u00ed:<\/p>\n

cat \/proc\/net\/wireless
Inter-| sta-| Quality | Discarded packets | Missed | WE
face | tus | link level noise | nwid crypt frag retry misc | beacon | 22
eth1: 0000 50. -60. -127. 0 0 0 0 0 0<\/p><\/blockquote>\n

Podemos hacer este script para que nos de el % en tiempo real:
— inicio copiar y pegar<\/p>\n

# Por Paco Aldarias
# 11.8.09
# senyal.sh<\/p>\n

# Calculo del maximo valor de se\u00f1al.
max_lin=$( iwconfig eth1 | awk ‘ \/Quality\/ { print $2 }’ | cut -d \u00ab\/\u00bb -f2)
suma=0
valores=0
promedio=0
maximo=0
minimo=100
while :
do
clear
echo \u00abMEDIDOR DE NIVELES DE SE\u00d1AL\u00bb
echo \u00abPor Paco Aldarias. 11.8.09\u00bb
# Obtener el valor de la se\u00f1al
s=$(cat \/proc\/net\/wireless | tail -1 | awk ‘{ print $3 }’ | cut -d \u00ab.\u00bb -f1)
# Calculo del porcentaje
ps=$(echo \u00bb ($s * 100 \/ $max_lin) \u00bb | bc )
let suma=suma+ps
let valores=valores+1
let promedio=suma\/valores
if [ $ps -lt $minimo ];then minimo=$ps; fi
if [ $ps -gt $maximo ];then maximo=$ps; fi
echo \u00abQuality link. Calidad se\u00f1al [MAXIMO $max_lin]: $s -> $ps %\u00bb
echo \u00abMinimo: $minimo % ; Maximo: $maximo %; Promedio: $promedio %\u00bb
sleep 1
done<\/p>\n<\/blockquote>\n

— fin copiar y pegar<\/p>\n

El resultado es:<\/p>\n

MEDIDOR DE NIVELES DE SE\u00d1AL
Por Paco Aldarias. 11.8.09
Quality link. Calidad se\u00f1al [MAXIMO 70]: 37 -> 52 %
Minimo: 50 % ; Maximo: 52 %; Promedio: 51 %<\/p><\/blockquote>\n

Otra opcion, la cual nos deja sin red, es usar el programa:
kismet<\/p>\n

Otras opciones, seg\u00fan Ram\u00f3n Onrubia:<\/p>\n

Para hacer un scan por consola del nivel de potencia del resto de redes en
tiempo real, con:<\/p>\n

airodump-ng interfaz<\/p>\n

Para ver el nivel de potencia de la red a la que estoy asociado seg\u00fan
el punto de la casa en que me encuentre y con una frecuencia de un
segundo entre muestreos, tan s\u00f3lo hago esto:<\/p>\n

watch -t -n 1 \u00abiwconfig wlan0 | grep Link\u00bb<\/p>\n

suponiendo que la tarjeta es la wlan0.<\/p>\n","protected":false},"excerpt":{"rendered":"

Debido a que no me llegaba la se\u00f1al wireless, me puse a mirar como medirla, y adem\u00e1s de forma num\u00e9rica en %.La versi\u00f3n de linux es ubuntu 8.1. uname -aLinux laurita 2.6.27-14-generic #1 SMP Wed Jul 29 09:01:45 UTC 2009 … Sigue leyendo →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"episode_type":"","audio_file":"","podmotor_file_id":"","podmotor_episode_id":"","cover_image":"","cover_image_id":"","duration":"","filesize":"","filesize_raw":"","date_recorded":"","explicit":"","block":"","itunes_episode_number":"","itunes_title":"","itunes_season_number":"","itunes_episode_type":"","footnotes":""},"categories":[237,117,236],"tags":[],"class_list":["post-187","post","type-post","status-publish","format-standard","hentry","category-medir-senal-wireless","category-script","category-wifi"],"_links":{"self":[{"href":"http:\/\/aldarias.es\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/187","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/aldarias.es\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/aldarias.es\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/aldarias.es\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/aldarias.es\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=187"}],"version-history":[{"count":0,"href":"http:\/\/aldarias.es\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/187\/revisions"}],"wp:attachment":[{"href":"http:\/\/aldarias.es\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=187"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/aldarias.es\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=187"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/aldarias.es\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=187"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}