Using eth0 AND OR wlan0 independently

Question

uname -a Linux CamPan 4.4.50+ #970 Mon Feb 20 19:12:50 GMT 2017 armv6l GNU/Linux

I have, after some struggles, managed to get BOTH wired (eth0) & wireless (wlan0) working on my Pi.

As per instructions here:

https://raspberrypi.stackexchange.com/questions/37920/how-do-i-set-up-networking-wifi-static-ip-address

I made one minor addition to /etc/network/interfaces , adding auto wlan0 above

allow-hotplug wlan0
iface wlan0 inet manual
    wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

Supplicant.conf looks like this:

    ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
    update_config=1
    country=GB

    network={
            ssid="XYZ"
            key_mgmt=NONE
    }

    network={
            ssid="ABC"
            psk="*****"
            key_mgmt=WPA-PSK
    }

    network={
            ssid="DEF"
            psk="*****"
            key_mgmt=WPA-PSK
    }

    network={
            ssid="GHI"
            psk="*****"
            key_mgmt=WPA-PSK
}

The last lines of /etc/dhcpcd.conf:

interface eth0
static ip_address=192.168.7.220/24
static routers=192.168.7.1
static domain_name_servers=192.168.7.1

interface wlan0
static ip_address=192.168.7.221/24
static routers=192.168.7.1
static domain_name_servers=192.168.7.1

Wireless connectivity works, providing eth0 is connected but if I reboot without a wired connection, the wireless isn't available.

The application is a Pi with an Adafruit stepper shield. It's running two stepper motors to control a stop-frame animation panning rig. I'm also learning how to create Python Restful APIs to control it, so I can control it via a web app (probably from my phone).

I need wireless for control and I need wired or wireless for setup, dev & test but it's a pain to have to connect wired for wireless. I could exclude the eth0 config and I presume that might work but it seems like an unnecessary hack. How can I have both eth0 AND wlan0, independently

Using eth0 AND OR wlan0 independently

0 Answers0