# AutoConnect <small>for ESP8266/ESP32</small>

An Arduino library for ESP8266/ESP32 WLAN configuration at run time with web interface.

## Overview

To the dynamic configuration for joining to WLAN with SSID and PSK accordingly. It an Arduino library united with *ESP8266WebServer* class for ESP8266 or *WebServer* class for ESP32.
Easy implementing the Web interface constituting the WLAN for ESP8266/ESP32 WiFi connection. With this library to make a sketch easily which connects from ESP8266/ESP32 to the access point at runtime by the web interface without hard-coded SSID and password.

<img style="display:inline-block;width:460px;margin-right:30px;" src="./images/ov.png" /><span style="display:inline-block;width:182px;height:322px;border:solid 1px lightgrey;"><img data-gifffer="./images/ov.gif" data-gifffer-width="180" style="width:180px;" /></span>

### <i class="fa fa-arrow-circle-right" aria-hidden="true"></i> No need pre-coded SSID &amp; password

<span class="lead">It is no needed hard-coding in advance the SSID and Password into the sketch to connect between ESP8266/ESP32 and WLAN. You can input SSID &amp; Password from a smartphone via the web interface at runtime.</span>

### <i class="fa fa-arrow-circle-right" aria-hidden="true"></i> Simple usage

<span class="lead">AutoConnect control screen will be displayed automatically for establishing new connections. It aids by the <a href="https://en.wikipedia.org/wiki/Captive_portal">captive portal</a> when vested the connection cannot be detected.<br>By using the [AutoConnect menu](menu.md), to manage the connections convenient.</span>

### <i class="fa fa-arrow-circle-right" aria-hidden="true"></i> Store the established connection

<span class="lead">The connection authentication data as credentials are saved automatically in EEPROM of ESP8266/ESP32 and You can select the past SSID from the [AutoConnect menu](menu.md).</span>

### <i class="fa fa-arrow-circle-right" aria-hidden="true"></i> Easy to embed in

<span class="lead">AutoConnect can be placed easily in your sketch. It's "**begin**" and "**handleClient**" only.</span>

### <i class="fa fa-arrow-circle-right" aria-hidden="true"></i> Lives with the your sketches

<span class="lead">The sketches which provide the web page using ESP8266WebServer there is, AutoConnect will not disturb it. AutoConnect can use an already instantiated ESP8266WebServer object, or itself can assign it.<br>This efficacy can also be applied to ESP32. The corresponding class for ESP32 will be the WebServer.</span>

### <i class="fa fa-arrow-circle-right" aria-hidden="true"></i> Easy to add custom web screen<sup><sub>ENHANCED w/v0.9.7</sub></sup>

<span class="lead">You can easily add your own web screen that can consist of representative HTML elements as the styled TEXT, INPUT, BUTTON, CHECKBOX, RADIO, SELECT, SUBMIT into the menu. It can be invoked from the AutoConnect menu and parameters can be passed. Custom screens can be written easily with JSON and can be loaded from PROGMEM, SPIFFS or SD.</span>

<img style="float:left;width:380px;" src="./images/aux_json.png">
<img style="float:left;margin-top:200px;margin-left:10px;margin-right:10px;width:32px;" src="./images/arrow_right.png">
<img style="float:left;width:240px" src="./images/AutoConnectAux.gif">

## Installation

### Requirements

#### Supported hardware

  * [X] Generic ESP8266 modules (applying the ESP8266 Community's Arduino core)
  * [X] Adafruit HUZZAH ESP8266 (ESP-12)
  * [X] ESP-WROOM-02
  * [X] Heltec WiFi Kit 8
  * [X] NodeMCU 0.9 (ESP-12) / NodeMCU 1.0 (ESP-12E)
  * [X] Olimex MOD-WIFI-ESP8266
  * [X] SparkFun Thing
  * [X] SweetPea ESP-210
  * [X] ESP32Dev Board (applying the Espressif's arduino-esp32 core)
  * [X] SparkFun ESP32 Thing
  * [X] WEMOS LOLIN D32
  * [X] Ai-Thinker NodeMCU-32S
  * [X] Heltec WiFi Kit 32
  * [X] M5Stack
  * [X] And other ESP8266/ESP32 modules supported by the Additional Board Manager URLs of the Arduino-IDE.

!!! info "About flash size on the module"
    The AutoConnect sketch size is relatively large. Large flash capacity is necessary. 512Kbyte (4Mbits) flash inclusion module such as ESP-01 is not recommended.

#### Required libraries

AutoConnect requires the following environment and libraries.

<i class="fa fa-download"></i> <strong>Arduino IDE</strong>

The current upstream at the 1.8 level or later is needed. Please install from the [official Arduino IDE download page](https://www.arduino.cc/en/Main/Software). This step is not required if you already have a modern version.

<i class="fa fa-download"></i> <strong>ESP8266 Arduino core</strong>

AutoConnect targets sketches made on the assumption of [ESP8266 Community's Arduino core](https://github.com/esp8266/Arduino). The [latest release](https://github.com/esp8266/Arduino/releases/latest) is recommended.  
Install third-party platform using the *Boards Manager* of Arduino IDE. Package URL is http://arduino.esp8266.com/stable/package_esp8266com_index.json

<i class="fa fa-download"></i> <strong>ESP32 Arduino core</strong>

Also, to apply AutoConnect to ESP32, the [arduino-esp32 core](https://github.com/espressif/arduino-esp32) provided by Espressif is needed. The [latest release](https://github.com/espressif/arduino-esp32/releases/latest) is recommended.  
Install third-party platform using the *Boards Manager* of Arduino IDE. You can add multiple URLs into *Additional Board Manager URLs* field, separating them with commas. Package URL is https://dl.espressif.com/dl/package_esp32_index.json for ESP32.

<i class="fa fa-download"></i> <strong>Additional necessary library</strong>

The [PageBuilder](https://github.com/Hieromon/PageBuilder) library to build HTML for ESP8266WebServer is needed.  
To install the PageBuilder library into your Arduino IDE, you can use the *Library Manager*. Select the board of ESP8266 series in the Arduino IDE, open the library manager and search keyword '**PageBuilder**' with the topic '**Communication**', then you can see the *PageBuilder*. The latest version is required 1.3.0 later.[^1]

<img src="./images/lm.png" width="640"/>

[^1]:Since AutoConnect v0.9.7, PageBuilder v1.3.0 later is required.

<i class="fa fa-download"></i> <strong>Another library (optional)</strong>

The [ArduinoJson](https://github.com/bblanchon/ArduinoJson) library is necessary to be able to process the [**custom Web Pages**](acintro.md) with JSON description. Since AutoConnect v0.9.7, you can insert user owned screens that can consist of representative HTML elements as the styled TEXT, INPUT, BUTTON, CHECKBOX, SELECT, SUBMIT to the AutoConnect menu. These HTML elements can be added from the user sketch using the AutoConnect API, and you can also easily import the custom Web page declarations described with JSON which stored in PROGMEM, SPIFFS, or SD. [ArduinoJson version 5](https://arduinojson.org/v5/doc/) is required to use this feature.

!!! info "AutoConnect supports ArduinoJson version 5 only"
    And ArduinoJson version 6 is still in beta. The Arduino Library Manager installs the ArduinoJson version 6 by default. Open the Arduino Library Manager and make sure that ArduinoJson version 5 is installed.

### Install the AutoConnect

Clone or download from the [AutoConnect GitHub repository](https://github.com/Hieromon/AutoConnect).

<img src="./images/gitrepo.png" width="640"/>

When you select Download, you can import it to Arduino IDE immediately. After downloaded, the AutoConnect-master.zip file will be saved in your download folder. Then in the Arduino IDE, navigate to *"Sketch > Include Library"*. At the top of the drop down list, select the option to *"Add .ZIP Library..."*. Details for [Arduino official page](https://www.arduino.cc/en/Guide/Libraries#toc4).

<img src="./images/ins_lib.png" />

!!! info "Supported by Library manager."
    AutoConnect was added to the Arduino IDE library manager. It can be used with the PlatformIO library also.

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