WiFiManager

ESP8266 WiFi Connection manager with fallback web configuration portal

The configuration portal is of the captive variety, so on various devices it will present the configuration dialogue as soon as you connect to the created access point.

First attempt at a library. Lots more changes and fixes to do. Contributions are welcome.

This works with the ESP8266 Arduino platform with a recent stable release(2.0.0 or newer) https://github.com/esp8266/Arduino

How It works

when your ESP starts up, it sets it up in Station mode and tries to connect to a previously saved Access Point
if this is unsuccessful (or no previous network saved) it moves the ESP into Access Point mode and spins up a DNS and WebServer (default ip 192.168.4.1)
using any wifi enabled device with a browser (computer, phone, tablet) connect to the newly created Access Point
because of the Captive Portal and the DNS server you will either get a 'Join to network' type of popup or get any domain you try to access redirected to the configuration portal
choose one of the access points scanned, enter password, click save
ESP will try to connect. If successful, it relinquishes control back to your app. If not, reconnect to AP and reconfigure.

Wishlist

~~remove dependency on EEPROM library~~
~~move HTML Strings to PROGMEM~~
cleanup and streamline code
if timeout is set, extend it when a page is fetched in AP mode
add ability to configure more parameters than ssid/password
maybe allow setting ip of ESP after reboot
~~add to Arduino Boards Manager~~
add to PlatformIO
add multiple sets of network credentials
allow users to customize CSS

Quick Start

You can either install through the Arduino Boards Manager or checkout the latest changes or a release from github

Install through Boards Manager

Currently version 0.5 works with release 2.0.0 or newer of the ESP8266 core for Arduino

in Arduino IDE got to Sketch/Include Library/Manage Libraries
search for WiFiManager
click Install and start using it

Checkout from github

Github version works with release 2.0.0 or newer of the ESP8266 core for Arduino

Checkout library to your Arduino libraries folder

Using

Include in your sketch

#include <DNSServer.h>
#include <ESP8266WebServer.h>
#include <WiFiManager.h>

Initialize library, in your setup function add

WiFiManager wifiManager;

Also in the setup function add

//first parameter is name of access point, second is the password
wifiManager.autoConnect("AP-NAME", "AP-PASSWORD");

if you just want an unsecured access point

wifiManager.autoConnect("AP-NAME");

or if you want to use and auto generated name from 'ESP' and the esp's Chip ID use

wifiManager.autoConnect();

After you write your sketch and start the ESP, it will try to connect to WiFi. If it fails it starts in Access Point mode. While in AP mode, connect to it then open a browser to the gateway IP, default 192.168.4.1, configure wifi, save and it should reboot and connect.

Also see examples.

Password protect the configuration Access Point

You can and should password protect the configuration access point. Simply add the password as a second parameter to autoConnect. A short password seems to have unpredictable results so use one that's around 8 characters or more in length. The guidelines are that a wifi password must consist of 8 to 63 ASCII-encoded characters in the range of 32 to 126 (decimal)

wifiManager.autoConnect("AutoConnectAP", "password")

Callbacks

Enter Config mode

Use this if you need to do something when your device enters configuration mode on failed WiFi connection attempt. Before autoConnect()

wifiManager.setAPCallback(configModeCallback);

configModeCallback declaration and example

void configModeCallback () {
  Serial.println("Entered config mode");
  Serial.println(WiFi.softAPIP());
}

Timeout

If you need to set a timeout so the ESP doesn't hang waiting to be configured, for instance after a power failure, you can add

wifiManager.setTimeout(180);

which will wait 3 minutes (180 seconds). When the time passes, the autoConnect function will return, no matter the outcome. Check for connection and if it's still not established do whatever is needed (on some modules I restart them to retry, on others I enter deep sleep)

Debug

Debug is enabled by default on Serial. To disable add before autoConnect

wifiManager.setDebugOutput(false);

Custom IP Configuration

This will set your captive portal to a specific IP should you need/want such a feature. Add the following snippet before autoConnect()

//set custom ip for portal
wifiManager.setAPConfig(IPAddress(10,0,1,1), IPAddress(10,0,1,1), IPAddress(255,255,255,0));

Releases

0.5

Added to Arduino Boards Manager - Thanks Max
moved most stuff to PROGMEM
added signal quality and a nice little padlock to show which networks are encrypted

v0.4 - user contributed changes - Thank you

added ability to password protect the configuration Access Point
callback for enter configuration mode
memory allocation improvements

v0.3

removed the need for EEPROM and works with the 2.0.0 and above stable release of the ESP8266 for Arduino IDE package
removed restart on save of credentials
updated examples

v0.2

needs the latest staging version (or at least a recent release of the staging version) to work

v0.1

works with the staging release ver. 1.6.5-1044-g170995a, built on Aug 10, 2015 of the ESP8266 Arduino library.

Contributions and thanks

The support and help I got from the community has been nothing short of phenomenal. I can't thank you guys enough. This is my first real attept in developing open source stuff and I must say, now I understand why people are so dedicated to it, it is because of all the wonderful people involved.

THANK YOU