micropython/docs/library/network.rst

357 lines
11 KiB
ReStructuredText
Raw Normal View History

****************************************
:mod:`network` --- network configuration
****************************************
.. module:: network
:synopsis: network configuration
This module provides network drivers and routing configuration. Network
drivers for specific hardware are available within this module and are
used to configure a hardware network interface. Configured interfaces
are then available for use via the :mod:`socket` module.
For example::
# configure a specific network interface
# see below for examples of specific drivers
import network
nic = network.Driver(...)
print(nic.ifconfig())
# now use socket as usual
import socket
addr = socket.getaddrinfo('micropython.org', 80)[0][-1]
s = socket.socket()
s.connect(addr)
s.send(b'GET / HTTP/1.1\r\nHost: micropython.org\r\n\r\n')
data = s.recv(1000)
s.close()
.. only:: port_pyboard
class CC3K
==========
This class provides a driver for CC3000 wifi modules. Example usage::
import network
nic = network.CC3K(pyb.SPI(2), pyb.Pin.board.Y5, pyb.Pin.board.Y4, pyb.Pin.board.Y3)
nic.connect('your-ssid', 'your-password')
while not nic.isconnected():
pyb.delay(50)
print(nic.ifconfig())
# now use socket as usual
...
For this example to work the CC3000 module must have the following connections:
- MOSI connected to Y8
- MISO connected to Y7
- CLK connected to Y6
- CS connected to Y5
- VBEN connected to Y4
- IRQ connected to Y3
It is possible to use other SPI busses and other pins for CS, VBEN and IRQ.
Constructors
------------
.. class:: CC3K(spi, pin_cs, pin_en, pin_irq)
Create a CC3K driver object, initialise the CC3000 module using the given SPI bus
and pins, and return the CC3K object.
Arguments are:
- ``spi`` is an :ref:`SPI object <pyb.SPI>` which is the SPI bus that the CC3000 is
connected to (the MOSI, MISO and CLK pins).
- ``pin_cs`` is a :ref:`Pin object <pyb.Pin>` which is connected to the CC3000 CS pin.
- ``pin_en`` is a :ref:`Pin object <pyb.Pin>` which is connected to the CC3000 VBEN pin.
- ``pin_irq`` is a :ref:`Pin object <pyb.Pin>` which is connected to the CC3000 IRQ pin.
All of these objects will be initialised by the driver, so there is no need to
initialise them yourself. For example, you can use::
nic = network.CC3K(pyb.SPI(2), pyb.Pin.board.Y5, pyb.Pin.board.Y4, pyb.Pin.board.Y3)
Methods
-------
.. method:: cc3k.connect(ssid, key=None, \*, security=WPA2, bssid=None)
Connect to a wifi access point using the given SSID, and other security
parameters.
.. method:: cc3k.disconnect()
Disconnect from the wifi access point.
.. method:: cc3k.isconnected()
Returns True if connected to a wifi access point and has a valid IP address,
False otherwise.
.. method:: cc3k.ifconfig()
Returns a 7-tuple with (ip, subnet mask, gateway, DNS server, DHCP server,
MAC address, SSID).
.. method:: cc3k.patch_version()
Return the version of the patch program (firmware) on the CC3000.
.. method:: cc3k.patch_program('pgm')
Upload the current firmware to the CC3000. You must pass 'pgm' as the first
argument in order for the upload to proceed.
Constants
---------
.. data:: CC3K.WEP
.. data:: CC3K.WPA
.. data:: CC3K.WPA2
security type to use
class WIZNET5K
==============
This class allows you to control WIZnet5x00 Ethernet adaptors based on
the W5200 and W5500 chipsets (only W5200 tested).
Example usage::
import network
nic = network.WIZNET5K(pyb.SPI(1), pyb.Pin.board.X5, pyb.Pin.board.X4)
print(nic.ifconfig())
# now use socket as usual
...
For this example to work the WIZnet5x00 module must have the following connections:
- MOSI connected to X8
- MISO connected to X7
- SCLK connected to X6
- nSS connected to X5
- nRESET connected to X4
It is possible to use other SPI busses and other pins for nSS and nRESET.
Constructors
------------
.. class:: WIZNET5K(spi, pin_cs, pin_rst)
Create a WIZNET5K driver object, initialise the WIZnet5x00 module using the given
SPI bus and pins, and return the WIZNET5K object.
Arguments are:
- ``spi`` is an :ref:`SPI object <pyb.SPI>` which is the SPI bus that the WIZnet5x00 is
connected to (the MOSI, MISO and SCLK pins).
- ``pin_cs`` is a :ref:`Pin object <pyb.Pin>` which is connected to the WIZnet5x00 nSS pin.
- ``pin_rst`` is a :ref:`Pin object <pyb.Pin>` which is connected to the WIZnet5x00 nRESET pin.
All of these objects will be initialised by the driver, so there is no need to
initialise them yourself. For example, you can use::
nic = network.WIZNET5K(pyb.SPI(1), pyb.Pin.board.X5, pyb.Pin.board.X4)
Methods
-------
.. method:: wiznet5k.ifconfig([(ip, subnet, gateway, dns)])
Get/set IP address, subnet mask, gateway and DNS.
When called with no arguments, this method returns a 4-tuple with the above information.
To set the above values, pass a 4-tuple with the required information. For example::
nic.ifconfig(('192.168.0.4', '255.255.255.0', '192.168.0.1', '8.8.8.8'))
.. method:: wiznet5k.regs()
Dump the WIZnet5x00 registers. Useful for debugging.
.. only:: port_esp8266
class WLAN
==========
.. _network.WLAN:
This class provides a driver for WiFi network processor in the ESP8266. Example usage::
import network
# setup as a station
nic = network.WLAN()
nic.connect('your-ssid', 'your-password')
# now use socket as usual
Constructors
------------
.. class:: WLAN()
Create a WLAN driver object.
Methods
-------
.. method:: wlan.connect(ssid, password)
Connect to the specified wireless network, using the specified password.
.. method:: wlan.disconnect()
Disconnect from the currently connected wireless network.
.. only:: port_wipy
class WLAN
==========
.. _network.WLAN:
This class provides a driver for WiFi network processor in the WiPy. Example usage::
import network
# setup as a station
nic = network.WLAN(WLAN.STA)
nic.connect('your-ssid', security=WLAN.WPA_WPA2, key='your-key')
while not nic.isconnected():
pyb.delay(50)
print(nic.ifconfig())
# now use socket as usual
...
Constructors
------------
.. class:: WLAN(mode, ssid, \*, security=WLAN.OPEN, key=None, channel=5)
Create a WLAN driver object, initialise the WLAN engine in station or AP mode.
Arguments are:
- ``mode`` can be either ``WLAN.STA`` or ``WLAN.AP``.
- ``ssid`` is a string with the ssid name. Only needed when mode is ``WLAN.AP``.
- ``security`` can be ``WLAN.OPEN``, ``WLAN.WEP`` or ``WLAN.WPA_WPA2``.
Only needed when mode is ``WLAN.AP``.
- ``key`` is a string with the ``WLAN.WPA_WPA2`` key or a byte array with the
``WLAN.WEP`` key. Not needed when mode is ``WLAN.STA`` or security is ``WLAN.OPEN``.
- ``channel`` a number in the range 1-11. Only needed when mode is ``WLAN.AP``.
For example, you can use::
# configure as an access point
nic = network.WLAN(WLAN.AP, 'wipy-wlan', security=WLAN.WPA_WPA2, key='www.wipy.io', channel=7)
or::
# configure as an station
nic = network.WLAN(WLAN.STA)
Methods
-------
.. method:: wlan.connect(ssid, \*, security=WLAN.OPEN, key=None, bssid=None, timeout=5000)
Connect to a wifi access point using the given SSID, and other security
parameters.
- ``bssid`` is the MAC address of the AP to connect to. Useful when there are several APs
with the same ssid.
- ``timeout`` is the maximum time in milliseconds to wait for the connection to succeed.
.. method:: wlan.scan()
Performs a network scan and returns a list of named tuples with (ssid, bssid, security, channel, rssi).
Note that channel is always ``None`` since this info is not provided by the WiPy.
.. method:: wlan.disconnect()
Disconnect from the wifi access point.
.. method:: wlan.isconnected()
Returns True if connected to a wifi access point and has a valid IP address,
False otherwise.
.. method:: wlan.ifconfig(['dhcp' or configtuple])
With no parameters given eturns a 4-tuple of ``(ip, subnet mask, gateway, DNS server)``.
if ``'dhcp'`` is passed as a parameter then the DHCP client is enabled and the IP params
are negotiated with the AP.
if the 4-tuple config is given then a static IP is configured. For example::
nic.ifconfig(('192.168.0.4', '255.255.255.0', '192.168.0.1', '8.8.8.8'))
.. method:: wlan.info()
Provides information about the current WLAN configuration. Returns a named tuple
of (mode, ssid, security, mac)
- ``mode`` can be either ``WLAN.STA`` or ``WLAN.AP``.
- ``ssid`` is a string with our ssid if in AP mode, ``None`` oterwise.
- ``security`` security type currently used.
- ``mac`` our MAC address.
.. method:: wlan.connections()
Returns a list of the devices currently connected. Each item in the list is a
tuple of ``(ssid, mac)``.
.. method:: wlan.antenna(antenna_type)
Selects the antenna type to be used. Must be either ``WLAN.INT_ANTENNA`` or
``WLAN.EXT_ANTENNA``.
.. method:: wlan.callback(wakes)
Create a callback to be triggered when a WLAN event occurs during ``pyb.Sleep.SUSPENDED``
mode. Events are triggered by socket activity or by WLAN connection/disconnection.
- ``wakes`` can only be ``pyb.Sleep.SUSPENDED``.
Returns a callback object.
Constants
---------
.. data:: WLAN.STA
WiFi station mode
.. data:: WLAN.AP
WiFi access point mode
.. data:: WLAN.OPEN
open network (no security)
.. data:: WLAN.WEP
WEP network security
.. data:: WLAN.WPA_WPA2
WPA/WPA2 network security
.. data:: WLAN.INT_ANTENNA
selects the internal antenna
.. data:: WLAN.EXT_ANTENNA
selects the external antenna