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AutoConnect/mkdocs/api.md

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Include headers

AutoConnect.h

#include <AutoConnect.h>

Define macros

#define AC_DEBUG                                // Monitor message output activation
#define AC_DEBUG_PORT           Serial          // Default message output device
#define AUTOCONNECT_AP_IP       0x01F4A8C0      // Default SoftAP IP
#define AUTOCONNECT_AP_GW       0x01F4A8C0      // Default SoftAP Gateway IP
#define AUTOCONNECT_AP_NM       0x00FFFFFF      // Default subnet mask
#define AUTOCONNECT_DNSPORT     53              // Default DNS port at captive portal
#define AUTOCONNECT_HTTPPORT    80              // Default HTTP
#define AUTOCONNECT_MENU_TITLE  "AutoConnect"   // Default AutoConnect menu title
#define AUTOCONNECT_STARTUPTIME 10              // Default waiting time[s] for after reset
#define AUTOCONNECT_URI         "/_ac"          // Default AutoConnect root path
#define AUTOCONNECT_TIMEOUT     30000           // Default connection timeout[ms]

AutoConnect API

Constructors

AutoConnect

AutoConnect()

AutoConnect default constructor. This entry internally allocates the ESP8266WebServer and is activated internally.

AutoConnect(ESP8266WebServer& webServer)

Run the AutoConnect site using the externally ensured ESP8266WebServer.

The handleClient function of AutoConnect can include the response of the URI handler added by the user using the "on" function of ESP8266WebServer. If ESP8266WebServer is assigned internally by AutoConnect, the sketch can obtain that reference with the host function.

**Parameters**
webServerA reference of ESP8266WebServer instance.

Public member functions

begin

bool begin()

bool begin(const char* ssid, const char* passphraase)

bool begin(const char* ssid, const char* passphraase, unsinged long timeout)

Starts establishing the WiFi connection.
AutoConnect first invokes WiFi.begin. If the case of SSID and Password missing, its WiFi.begin has no SSID and Password. The WiFi mode at this time is WIFI_STA. Then ESP8266WebServer will be started immediately after the first WiFi.beign regardless of the result.

The captive portal will not be started if the connection has been established with first WiFi.begin. If the connection cannot establish, switch to WIFI_AP_STA mode and activate SoftAP. Then DNS server starts.

**Parameters**
ssidSSID to be connected.
passphrasePassword for connection.
timeoutA time out value in milliseconds for waiting connection.
**Return value**
trueConnection established, AutoConnect service started with WIFI_STA mode.
falseCould not connected, Captive portal started with WIFI_AP_STA mode.

config

bool config(AutoConnectConfig& config)

bool config(const char* ap, const char* password = nullptr)

Set SoftAP's WiFi configuration and static IP configuration.

**Parameters**
configReference to [**AutoConnectConfig**](api.md#autoconnectconfig) containing SoftAP's parameters and static IP parameters.
apSSID for SoftAP. The default value is **esp8266ap**.
passwordPassword for SodtAP. The default value is **12345678**.
**Return value**
trueSuccessfully configured.
falseConfiguration parameter is invalid, some values out of range.

end

void end()

Stops AutoConnect captive portal service. Release ESP8266WebServer and DNSServer.

!!! warning "Attention to end" The end function releases the instance of ESP8266WebServer and DNSServer. It can not process them after the end function.

handleClient

void handleClient()

Process the AutoConnect menu interface. It will be processed the client request too contained in the user sketch handler by calling the host handleClient::ESP8266WebServer from the Autoconnect internally.

handleRequest

void handleRequest()

Handling for the AutoConnect menu request.

!!! warning "About used in combination with handleClient" The handleRequest function is not supposed to use with AutoConnect::handleClient. It should be used with ESP8266::handleClient.

home

void home(String uri)

Put a user site's home URI. The URI specified by home is linked from "HOME" in the AutoConnect menu.

**Parameters**
uri A URI string of user site's home path.

host

Returns the reference of the ESP8266WebServer which is allocated in AutoConnect automatically.

ESP8266WebServer& host()
**Return value**
A reference of the ESP8266WebServer.

!!! note "&reference is not a pointer" A reference cannot be re-assigned, and must be assigned at initialization. It's like as bind as alias.
cpp ESP8266WebServer& server = portal.host(); server.handleClient(); or
cpp portal.host().handleClient();

onDetect

void onDetect(DetectExit_ft fn)

Register the function which will call from AutoConnect at the start of the captive portal.

**Parameters**
fnFunction called at the captive portal start.

An fn specifies the function called when the captive portal starts. Its prototype declaration is defined as "DetectExit_ft".

typedef std::function<bool(IPAddress softapIP)>  DetectExit_ft
**Parameters**
softapIPAn IP address of SoftAP for the captive portal.
**Retuen value**
trueContinues captive portal handling.
falseCancel the captive portal. AutoConnect::begin function will return with a false.

onNotFound

void onNotFound(ESP8266WebServer::THandlerFunction fn)

Register the handler function for undefined URL request detected.

**Parameters**
fnA function of the "not found" handler.

AutoConnectConfig API

Constructor

AutoConnectConfig

AutoConnectConfig();

AutoConnectConfig(const char* ap, const char* password);
**Parameters**
apSSID for SoftAP. The length should be up to 31. The default value is **esp8266ap**.
passwordPassword for SodtAP. The length should be from 8 to up to 63. The default value is **12345678**.

Public member variables

apid

SoftAP's SSID.

**Type**
String

apip

Sets IP address for Soft AP in captive portal. When AutoConnect fails the initial WiFi.begin, it starts the captive portal with the IP address specified this.

**Type**
IPAddressThe default value is **192.168.244.1**

autoReset

Reset ESP8266 module automatically after WLAN disconnected.

**Type**
bool
**Value**
trueReset after WiFi disconnected automatically.
falseNo reset.

autoRise

Captive portal activation switch. False for disabling the captive portal. It prevents starting the captive portal even if the connection at the first WiFi.begin fails.

**Type**
bool
**Value**
trueEnable the captive portal. This is the default.
falseDisable the captive portal.

autoSave

The credential saved automatically at the connection establishment.

**Type**
AC_SAVECREDENTIAL_t
**Value**
AC_SAVECREDENTIAL_AUTOThe credential saved automatically. This is the default.
AC_SAVECREDENTIAL_NEVERThe credential no saved.

boundaryOffset

Sets the offset address of the credential storage area for EEPROM. This value must be between greater than 4 and less than flash sector size. (4096 by SDK)
The default value is 0.

**Type**
uint16_t

!!! warning "It will conflict with user data." If the sketch leaves this offset at zero, it will conflict the storage area of credentials with the user sketch owned data. It needs to use the behind of credential area.

channel

The channel number of WIFi when SoftAP starts.

**Type**
uint8_t
**Value**
1 ~ 14. The default value is 1.

!!! info "How do I choose Channel" Espressif Systems had announced the application note about Wi-Fi channel selection.

dns1

Set primary DNS server address when using static IP address.

**Type**
IPAddress

dns2

Set secondary DNS server address when using static IP address.

**Type**
IPAddress

gateway

Sets gateway address for Soft AP in captive portal. When AutoConnect fails the initial WiFi.begin, it starts the captive portal with the IP address specified this.

**Type**
IPAddressThe default value is **192.168.244.1**

hidden

Sets SoftAP to hidden SSID.

**Type**
uint8_t
**Value**
0SSID will be appeared. This is the default.
1SSID will be hidden.

homeUri

Sets the home path of user sketch. This path would be linked from 'HOME' in the AutoConnect menu.

**Type**
String

netmask

Sets subnet mask for Soft AP in captive portal. When AutoConnect fails the initial WiFi.begin, it starts the captive portal with the IP address specified this.

**Type**
IPAddressThe default value is **255.255.255.0**

psk

Sets password for SoftAP. The length should be from 8 to up to 63. The default value is 12345678.

**Type**
String

staip

Set a static IP address. The IP will behave with STA mode.

**Type**
IPAddress

staGateway

Set the gateway address when using static IP address.

**Type**
IPAddress

staNetmask

Set the subnetmask when using static IP address.

**Type**
IPAddress

AutoConnectConfig example

AutoConenct        Portal;
AutoConenctConfig  Config("", "passpass");    // SoftAp name is determined at runtime
Config.apid = ESP.hostname();                 // Retrieve host name to SotAp identification
Config.apip = IPAddress(192,168,10,101);      // Sets SoftAP IP address
Config.gateway = IPAddress(192,168,10,1);     // Sets WLAN router IP address
Config.netmask = IPAddress(255,255,255,0);    // Sets WLAN scope
Config.autoSave = AC_SAVECREDENTIAL_NEVER;    // No save credential
COnfig.boundaryOffet = 64;                    // Reserve 64 bytes for the user data in EEPROM. 
Config.homeUri = "/index.html"				  // Sets home path of the sketch application
Config.staip = IPAddress(192,168,10,10);      // Sets static IP
Config.staGateway = IPAddress(192,168,10,1);  // Sets WiFi router address
Config.staNetmask = IPAddress(255,255,255,0); // Sets WLAN scope
Config.dns1 = IPAddress(192,168,10,1);        // Sets primary DNS address
Portal.config(Config);                        // Configure AutoConnect
Portal.begin();                               // Starts and behaves captive portal

Something extra

The library presents two PNG icons which can be used to embed a hyperlink to the AutoConnect menu.

  • Bar type AutoConnect menu
  • Cog type AutoConnect menu

To reference the icon, use the AUTOCONNECT_LINK macro in the sketch. It expands into the string literal as an HTML <a></a> tag with PNG embedded of the AutoConnect menu hyperlinks. Icon type is specified by the parameter of the macro.

BAR_24Bars icon, 24x24.
BAR_32Bars icon, 32x32.
BAR_48Bars icon, 48x48.
COG_24Cog icon, 24x24.
COG_32Cog icon, 32x32.

!!! note "Usage" arduino String html = "<html>"; html += AUTOCONNECT_LINK(BAR_32); html += "</html>"; server.send(200, "text/html", html);