ESP8266Interface class Implementation of the NetworkStack for the ESP8266. More...

#include <ESP8266Interface.h>

Public Member Functions
	ESP8266Interface (PinName tx, PinName rx, bool debug=false)
	ESP8266Interface lifetime.
virtual int	connect ()
	Start the interface.
virtual int	connect (const char ssid, const char pass, nsapi_security_t security=NSAPI_SECURITY_NONE, uint8_t channel=0)
	Start the interface.
virtual int	set_credentials (const char ssid, const char pass, nsapi_security_t security=NSAPI_SECURITY_NONE)
	Set the WiFi network credentials.
virtual int	set_channel (uint8_t channel)
	Set the WiFi network channel - NOT SUPPORTED.
virtual int	disconnect ()
	Stop the interface.
virtual const char *	get_ip_address ()
	Get the internally stored IP address.
virtual const char *	get_mac_address ()
	Get the internally stored MAC address.
virtual const char *	get_gateway ()
	Get the local gateway.
virtual const char *	get_netmask ()
	Get the local network mask.
virtual int8_t	get_rssi ()
	Gets the current radio signal strength for active connection.
virtual int	scan (WiFiAccessPoint *res, unsigned count)
	Scan for available networks.
Protected Member Functions
virtual int	socket_open (void **handle, nsapi_protocol_t proto)
	Open a socket.
virtual int	socket_close (void *handle)
	Close the socket.
virtual int	socket_bind (void *handle, const SocketAddress &address)
	Bind a server socket to a specific port.
virtual int	socket_listen (void *handle, int backlog)
	Start listening for incoming connections.
virtual int	socket_connect (void *handle, const SocketAddress &address)
	Connects this TCP socket to the server.
virtual int	socket_accept (void handle, void socket, SocketAddress address)
	Accept a new connection.
virtual int	socket_send (void handle, const void data, unsigned size)
	Send data to the remote host.
virtual int	socket_recv (void handle, void data, unsigned size)
	Receive data from the remote host.
virtual int	socket_sendto (void handle, const SocketAddress &address, const void data, unsigned size)
	Send a packet to a remote endpoint.
virtual int	socket_recvfrom (void handle, SocketAddress address, void *buffer, unsigned size)
	Receive a packet from a remote endpoint.
virtual void	socket_attach (void handle, void(callback)(void ), void data)
	Register a callback on state change of the socket.
virtual NetworkStack *	get_stack ()
	Provide access to the NetworkStack object.

Detailed Description

ESP8266Interface class Implementation of the NetworkStack for the ESP8266.

Definition at line 29 of file ESP8266Interface.h.

Constructor & Destructor Documentation

ESP8266Interface	(	PinName	tx,
		PinName	rx,
		bool	debug = `false`
	)

ESP8266Interface lifetime.

Parameters:

tx	TX pin
rx	RX pin
debug	Enable debugging

Definition at line 39 of file ESP8266Interface.cpp.

Member Function Documentation

int connect ( ) [virtual]

Start the interface.

Attempts to connect to a WiFi network. Requires ssid and passphrase to be set. If passphrase is invalid, NSAPI_ERROR_AUTH_ERROR is returned.

Returns:: 0 on success, negative error code on failure

Definition at line 59 of file ESP8266Interface.cpp.

int connect	(	const char *	ssid,
		const char *	pass,
		nsapi_security_t	security = `NSAPI_SECURITY_NONE`,
		uint8_t	channel = `0`
	)		`[virtual]`

Start the interface.

Attempts to connect to a WiFi network.

Parameters:

ssid	Name of the network to connect to
pass	Security passphrase to connect to the network
security	Type of encryption for connection (Default: NSAPI_SECURITY_NONE)
channel	This parameter is not supported, setting it to anything else than 0 will result in NSAPI_ERROR_UNSUPPORTED

Returns:: 0 on success, or error code on failure

Definition at line 48 of file ESP8266Interface.cpp.

int disconnect ( void ) [virtual]

Stop the interface.

Returns:: 0 on success, negative on failure

Definition at line 115 of file ESP8266Interface.cpp.

const char * get_gateway ( ) [virtual]

Get the local gateway.

Returns:: Null-terminated representation of the local gateway or null if no network mask has been recieved

Definition at line 136 of file ESP8266Interface.cpp.

const char * get_ip_address ( ) [virtual]

Get the internally stored IP address.

Returns:: IP address of the interface or null if not yet connected

Definition at line 126 of file ESP8266Interface.cpp.

const char * get_mac_address ( ) [virtual]

Get the internally stored MAC address.

Returns:: MAC address of the interface

Definition at line 131 of file ESP8266Interface.cpp.

const char * get_netmask ( ) [virtual]

Get the local network mask.

Returns:: Null-terminated representation of the local network mask or null if no network mask has been recieved

Definition at line 141 of file ESP8266Interface.cpp.

int8_t get_rssi ( ) [virtual]

Gets the current radio signal strength for active connection.

Returns:: Connection strength in dBm (negative value)

Definition at line 146 of file ESP8266Interface.cpp.

virtual NetworkStack* get_stack ( ) [protected, virtual]

Provide access to the NetworkStack object.

Returns:: The underlying NetworkStack object

Definition at line 253 of file ESP8266Interface.h.

int scan	(	WiFiAccessPoint *	res,
		unsigned	count
	)		`[virtual]`

Scan for available networks.

This function will block.

Parameters:

ap	Pointer to allocated array to store discovered AP
count	Size of allocated res array, or 0 to only count available AP
timeout	Timeout in milliseconds; 0 for no timeout (Default: 0)

Returns:: Number of entries in , or if count was 0 number of available networks, negative on error see nsapi_error

Definition at line 151 of file ESP8266Interface.cpp.

int set_channel ( uint8_t channel ) [virtual]

Set the WiFi network channel - NOT SUPPORTED.

This function is not supported and will return NSAPI_ERROR_UNSUPPORTED

Parameters:

channel Channel on which the connection is to be made, or 0 for any (Default: 0)

Returns:: Not supported, returns NSAPI_ERROR_UNSUPPORTED

Definition at line 109 of file ESP8266Interface.cpp.

int set_credentials	(	const char *	ssid,
		const char *	pass,
		nsapi_security_t	security = `NSAPI_SECURITY_NONE`
	)		`[virtual]`

Set the WiFi network credentials.

Parameters:

ssid	Name of the network to connect to
pass	Security passphrase to connect to the network
security	Type of encryption for connection (defaults to NSAPI_SECURITY_NONE)

Returns:: 0 on success, or error code on failure

Definition at line 96 of file ESP8266Interface.cpp.

int socket_accept	(	void *	handle,
		void **	socket,
		SocketAddress *	address
	)		`[protected, virtual]`

Accept a new connection.

Parameters:

handle	Handle in which to store new socket
server	Socket handle to server to accept from

Returns:: 0 on success, negative on failure

Note:: This call is not-blocking, if this call would block, must immediately return NSAPI_ERROR_WOULD_WAIT

Definition at line 232 of file ESP8266Interface.cpp.

void socket_attach	(	void *	handle,
		void()(void )	callback,
		void *	data
	)		`[protected, virtual]`

Register a callback on state change of the socket.

Parameters:

handle	Socket handle
callback	Function to call on state change
data	Argument to pass to callback

Note:: Callback may be called in an interrupt context.

Definition at line 296 of file ESP8266Interface.cpp.

int socket_bind	(	void *	handle,
		const SocketAddress &	address
	)		`[protected, virtual]`

Bind a server socket to a specific port.

Parameters:

handle	Socket handle
address	Local address to listen for incoming connections on

Returns:: 0 on success, negative on failure.

Definition at line 208 of file ESP8266Interface.cpp.

int socket_close ( void * handle ) [protected, virtual]

Close the socket.

Parameters:

handle Socket handle

Returns:: 0 on success, negative on failure

Note:: On failure, any memory associated with the socket must still be cleaned up

Definition at line 192 of file ESP8266Interface.cpp.

int socket_connect	(	void *	handle,
		const SocketAddress &	address
	)		`[protected, virtual]`

Connects this TCP socket to the server.

Parameters:

handle	Socket handle
address	SocketAddress to connect to

Returns:: 0 on success, negative on failure

Definition at line 218 of file ESP8266Interface.cpp.

int socket_listen	(	void *	handle,
		int	backlog
	)		`[protected, virtual]`

Start listening for incoming connections.

Parameters:

handle	Socket handle
backlog	Number of pending connections that can be queued up at any one time [Default: 1]

Returns:: 0 on success, negative on failure

Definition at line 213 of file ESP8266Interface.cpp.

int socket_open	(	void **	handle,
		nsapi_protocol_t	proto
	)		`[protected, virtual]`

Open a socket.

Parameters:

handle	Handle in which to store new socket
proto	Type of socket to open, NSAPI_TCP or NSAPI_UDP

Returns:: 0 on success, negative on failure

Definition at line 163 of file ESP8266Interface.cpp.

int socket_recv	(	void *	handle,
		void *	data,
		unsigned	size
	)		`[protected, virtual]`

Receive data from the remote host.

Parameters:

handle	Socket handle
data	The buffer in which to store the data received from the host
size	The maximum length of the buffer

Returns:: Number of received bytes on success, negative on failure

Note:: This call is not-blocking, if this call would block, must immediately return NSAPI_ERROR_WOULD_WAIT

Definition at line 249 of file ESP8266Interface.cpp.

int socket_recvfrom	(	void *	handle,
		SocketAddress *	address,
		void *	buffer,
		unsigned	size
	)		`[protected, virtual]`

Receive a packet from a remote endpoint.

Parameters:

handle	Socket handle
address	Destination for the remote SocketAddress or null
buffer	The buffer for storing the incoming packet data If a packet is too long to fit in the supplied buffer, excess bytes are discarded
size	The length of the buffer

Returns:: The number of received bytes on success, negative on failure

Note:: This call is not-blocking, if this call would block, must immediately return NSAPI_ERROR_WOULD_WAIT

Definition at line 285 of file ESP8266Interface.cpp.

int socket_send	(	void *	handle,
		const void *	data,
		unsigned	size
	)		`[protected, virtual]`

Send data to the remote host.

Parameters:

handle	Socket handle
data	The buffer to send to the host
size	The length of the buffer to send

Returns:: Number of written bytes on success, negative on failure

Note:: This call is not-blocking, if this call would block, must immediately return NSAPI_ERROR_WOULD_WAIT

Definition at line 237 of file ESP8266Interface.cpp.

int socket_sendto	(	void *	handle,
		const SocketAddress &	address,
		const void *	data,
		unsigned	size
	)		`[protected, virtual]`

Send a packet to a remote endpoint.

Parameters:

handle	Socket handle
address	The remote SocketAddress
data	The packet to be sent
size	The length of the packet to be sent

Returns:: The number of written bytes on success, negative on failure

Note:: This call is not-blocking, if this call would block, must immediately return NSAPI_ERROR_WOULD_WAIT

Definition at line 262 of file ESP8266Interface.cpp.

Type:	Library
Created:	10 Aug 2017
Imports:	155
Forks:	0
Commits:	7
Dependents:	1
Dependencies:	0
Followers:	90

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