Network

A rasp app the checks network status and displays on tab1

Environment setup

1. Install node and npm (if you don't already have it)
2. npm install

Run

npm start

Some useful commands and links

Status on all network devices

ifconfig

Set/change network name for the rasp

sudo pico /etc/hostname -> smartmeter-12345678 sudo reboot (har inte lyckats starta om endast tjänsten eller nätverket)

Useful background wifi links

https://linuxcommando.blogspot.se/2013/10/how-to-connect-to-wpawpa2-wifi-network.html https://www.raspberrypi.org/documentation/configuration/wireless/wireless-cli.md

Edit wifi network settings

sudo nano /etc/wpa_supplicant/wpa_supplicant.conf

Turn Wifi on/off

sudo ifdown wlan0 sudo ifup wlan0

Wireless device up / down

ip link show wlan0

Check the connection status

/sbin/iw wlan0 link /sbin/iw wlan0 link | grep SSID | awk '{print $1}' -> SSID:
if wlan0 is up

Set up with button

wpa_cli scan wpa_cli scan_results wpa_cli wps_pbc '70:8b:cd:e7:ac:d0'

Check that you are all set

/sbin/iw wlan0 link Connected to 70:8b:cd:e7:ac:d0 (on wlan0) SSID: ASUS-RT-N12-WAP-BUTTON freq: 2437 RX: 901 bytes (7 packets) TX: 7680 bytes (40 packets) signal: -21 dBm tx bitrate: 24.0 MBit/s

bss flags:	short-slot-time
dtim period:	3
beacon int:	100

/sbin/iw wlan0 link | grep SSID | awk '{print $2}' -> ASUS-RT-N12-WAP-BUTTON

/sbin/iw wlan0 link | grep SSID | echo $? 0 (SSID finns, funkar), 1 ( funkar inte)

Ping external through wlan0

ping -c 1 -I wlan0 www.kth.se exitCode :0 om ok, annars 1 eller 2 eller något helt annat