Installation and usage (for updated fork):

Tested on Raspberry pi 3 Model B+, 2017

1. If you have a pi w/ an OS installed already and either an ethernet connection or pre-configured wifi:

Either install git and clone this repo on your pi:
$ sudo apt-get install git
$ git clone https://github.com/LaboratoryForPlayfulComputation/RaspiWiFi.git

or perform a file transfer from your computer with the repo:
(WARNING: UNTESTED, you may want to transfer a zip file instead of recursively transferring the folder as there is an ssh file that scp doesn't understand well)
$ scp /path/to/RaspiWiFi/on/your/computer pi@192.168.0.xxx:~/RaspiWiFi

Next, install any libraries that you may be missing for RaspiWiFi and make sure that rfkill is unblocked on your pi:
$ cd RaspiWiFi
$ sudo ./system_setup.sh

Then, run the initial setup (feel free to edit the settings in this file if you want a different setup, such as a longer time period before reboot w/o wifi connection):
!WARNING: THIS ONLY WORKS ON INITIAL SETUP, NOT SUBSEQUENT SETUP!
# sudo python3 initial_setup_hardboiled.py

If you need to reset/return to hotspot mode without moving to a new network or turning off your current network, run the following from the RaspiWiFi directory:
$ sudo python3 libs/reset_device/manual_reset.py

Your pi will now reboot itself and will be broadcasting a hotspot at the following locations (this reboot process took me ~1 minute):
- http://10.0.0.1, http://raspiwifisetup.com, or http://idliketoconfigurethewifionthisdevicenowplease.com

Join the hotspot that is being broadcast on a computer, phone, tablet, etc (called "RaspiWiFi Setup xxx"), then navigate to one of these websites. Enter the credentials of the network that you'd like to join, then press "connect".

Your pi will reboot itself and join this network. It will no longer be broadcasting a hotspot. This reboot process took me ~30 seconds.

The default settings in this fork are for your pi to reboot itself in hotspot mode if you lose connection for 1 and a half minutes. We can increase this time once we've finished debugging our use cases.


DEBUGGING:
1. If you want to check if your pi is in hotspot mode ("host mode") or not from the command line, run `ifconfig wlan0`.

In hotspot mode, you'll see something like:
wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.0.0.1  netmask 255.255.255.0  broadcast 10.0.0.255
        inet6 fe80::ba27:ebff:fe68:5616  prefixlen 64  scopeid 0x20<link>
        ether b8:27:eb:68:56:16  txqueuelen 1000  (Ethernet)
        RX packets 784  bytes 53876 (52.6 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 81  bytes 17807 (17.3 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

In connected to wifi mode (and wifi is working), you'll see something like:
wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.0.106  netmask 255.255.255.0  broadcast 192.168.0.255
        inet6 fe80::da04:ec21:712b:e063  prefixlen 64  scopeid 0x20<link>
        ether b8:27:eb:68:56:16  txqueuelen 1000  (Ethernet)
        RX packets 14  bytes 2628 (2.5 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 24  bytes 4237 (4.1 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


Note the differences in inet addresses!

2. To see if the connection monitor is running in the background:
pi@raspberrypi:~ $ ps aux | grep "python"
root       422  0.2  0.8  14860  7696 ?        S    18:53   0:00 python3 /usr/lib/raspiwifi/reset_device/reset.py
root       423  0.3  0.8  15028  7996 ?        S    18:53   0:00 python3 /usr/lib/raspiwifi/reset_device/connection_monitor.py
pi         687  0.0  0.0   7348   508 pts/0    S+   18:54   0:00 grep --color=auto python

3. To see the logs from the connection monitor logs, which are be default written to your home directory (`/home/pi/wificonnectionmonitor.log`):

pi@raspberrypi:~ $ cat wificonnectionmonitor.log

or, to see just the last 20 lines:

pi@raspberrypi:~ $ tail -n 20 wificonnectionmonitor.log

This is what it will look like if the pi has a connection and nothing is wonky (1 line logged every 5 minutes):


This is what it will look like if the pi lost connection and re-gained it:
INFO:root:auto config delay: 90
WARNING:root:wifi is not active!
WARNING:root:consecutive active reports: 0
WARNING:root:no connection counter: 10
WARNING:root:wifi is not active!
WARNING:root:consecutive active reports: 0
WARNING:root:no connection counter: 20
WARNING:root:wifi is not active!
WARNING:root:consecutive active reports: 0
WARNING:root:no connection counter: 30
WARNING:root:wifi is active again, resetting connection counters!

IMPORTANT! If you CHANGE networks, (e.g. move your pi from your home to a different home), you will need to wait the connection monitor time (one and a half minutes here) for the pi to reboot in hotspot mode.


below is the Readme from jasbur's original RaspiWiFi library

RaspiWiFi

RaspiWiFi is a program to headlessly configure a Raspberry Pi's WiFi
connection using using any other WiFi-enabled device (much like the way
a Chromecast or similar device can be configured).

It can also be used as a method to connect wirelessly point-to-point with your
Pi when a network is not available or you do not want to connect to one. Just
leave it in Configuration Mode, connect to the "RaspiWiFi[xxxx] Setup" access
point. The Pi will be addressable at 10.0.0.1 using all the normal methods you
might use while connected through a network.

RaspiWiFi has been
tested with the Raspberry Pi B+, Raspberry Pi 3, and Raspberry Pi Zero W.



OS IMAGE USAGE:

== Just burn the ".IMG" file attached to this release to an 8GB+ SD card. Boot
your Raspberry Pi with the SD card and it will automatically boot into its AP
Host (broadcast) mode with an SSID based on a unique id (the last four of your
Pi's serial number). No input devices or displays necessary. Otherwise this is
a base install of the current Raspbian Stretch, up to date as of the date of
this release.



 SCRIPT-BASED INSTALLATION INSTRUCTIONS:

== Navigate to the directory where you downloaded or cloned RaspiWiFi

== Run:

sudo python3 initial_setup.py

== This script will install all necessary prerequisites and copy all necessary
config and library files, then reboot. When it finishes booting it should
present itself in "Configuration Mode" as a WiFi access point with the
name "RaspiWiFi[xxxx] Setup".

== The original RaspiWiFi directory that you ran the Initial Setup is no longer
needed after installation and can be safely deleted. All necessary files are
copied to /usr/lib/raspiwifi/ on setup.


CONFIGURATION:

== You will be prompted to set a few variables during the Initial Setup script:

==== "SSID Prefix" [default: "RaspiWiFi Setup"]: This is the prefix of the SSID
      that your Pi will broadcast for you to connect to during
      Configuration Mode (Host Mode). The last four of you Pi's serial number
      will be appended to whatever you enter here.

==== "WPA Encryption" [default: No]: If oyu enable this setting the Access Point 
      created during Configuration Mode will be encrypted using WPA2 encryption. 
      The prompt following this one will let you specify the Wireless Key to be 
      used. You can leave the password blank if you chose 'N' to this option. 

==== "Auto-Config mode" [default: n]: If you choose to enable this mode your Pi
      will check for an active connection while in normal operation mode (Client Mode).
      If an active connection has been determined to be lost, the Pi will reboot
      back into Configuration Mode (Host Mode) automatically.

==== "Auto-Config delay" [default: 300 seconds]: This is the time in consecutive
      seconds to wait with an inactive connection before triggering a reset into
      Configuration Mode (Host Mode). This is only applicable if the
      "Auto-Config mode" mentioned above is set to active.

==== "Server port" [default: 80]: This is the server port that the web server
      hosting the Configuration App page will be listening on. If you change
      this port make sure to add it to the end of the address when you're
      connecting to it. For example, if you speficiy 12345 as the port number
      you would navigate to the page like this: http://10.0.0.1:12345 If you
      leave the port at the default setting [80] there is no need to specify the
      port when navigating to the page.

==== "SSL Mode" [default: n]: With this option enabled your RaspiWifi
      configuration page will be sent over an SSL encrypted connection (don't
      forget the "s" when navigating to https://10.0.0.1:9191 when using
      this mode). You will get a certificate error from your web browser when
      connecting. The error is just a warning that the certificate has not been
      verified by a third party but everything will be properly encrypted anyway.

== All of these variables can be set at any time after the Initial Setup has
been running by editing the /etc/raspiwifi/raspiwifi.conf


USAGE:

== Connect to the "RaspiWiFi[xxxx] Setup" access point using any other WiFi enabled
device.

== Navigate to [10.0.0.1], [raspiwifisetup.com], or
[idliketoconfigurethewifionthisdevicenowplease.com] (I was debating whether this
was funny or not and, yes, it was) using any web browser on the device you
connected with. (don't forget to manually start with [https://] when using SSL mode)

== Select the WiFi connection you'd like your Raspberry Pi to connect to from
the drop down list and enter its wireless password on the page provided. If no
encryption is enabled, leave the password box blank. You may also manually
specify your network information by clicking on the "manual SSID entry ->" link.

== Click the "Connect" button.

== At this point your Raspberry Pi will reboot and connect to the access point
specified.

== You can view the current WPA encryption settings and change them from the main Web 
Configuration interface. The current settings are visible in a panel in the upper 
left corner of the screen. If you click the values in this display you will be taken 
to a page where you can change them. If you change them your device will reboot to 
enable the new configuration. 

== You can also use the Pi in a point-to-point connection mode by leaving it in
Configuration Mode. All services will be addresible in their normal way at
10.0.0.1 while connected to the "RaspiWiFi[xxxx] Setup" AP.



RESETTING THE DEVICE:

== If GPIO 18 is pulled HIGH for 10 seconds or more the Raspberry Pi will reset
all settings, reboot, and enter "Configuration Mode" again. It's useful to have
a simple button wired on GPIO 18 to reset easily if moving to a new location,
or if incorrect connection information is ever entered. Just press and hold for
10 seconds or longer.

== You can also reset the device by running the manual_reset.py in the
/usr/lib/raspiwifi/reset_device directory as root or with sudo.


UNINSTALLATION:

== You can uninstall RaspiWiFi at any time by running:
   
   sudo python3 /usr/lib/raspiwifi/uninstall.python3

   You can also run it from the "libs/" directory from a fresh clone if you've 
   installed from a previous version and don't have /usr/lib/raspiwifi/uninstall.py 
   available.