Connect to a network

network_connect.py

##################################################################################
import network                        # mqtt needs network connection            #
import time                           # to create small delays                   #
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##################################################################################
def wifi_connect(ssid, password):
##################################################################################
    # get a "station interface" (opposed to access point interface) from the
    # netwrok library. This object has the magic methods to connect to the
    # wireless network and then to the LAN on the IP level.
    sta_if = network.WLAN( network.STA_IF )
    # If it is already active de-activate it first so that we always start
    # from the same base state.
    if  sta_if.active():
        sta_if.active(False)

    # Now try to connect to the WIFI
    sta_if.active( True )   # necessary to activate the interface.

    print( "Connecting...")
    sta_if.connect( ssid, password )

    # Poll to know when the connection succeeds

    connected = sta_if.isconnected()

    # create some dotted lines on the display to
    # indicate the process which takes time.

    while not connected:
        print( ".", end="")
        time.sleep(0.1) # this is 100ms
        connected = sta_if.isconnected()

    print()

    # If we arrive here we should be connected
    print( "Success !")
    mac = sta_if.config('mac')
    # Show the IP address we got from the DHCP server

    ifparm = sta_if.ifconfig()
    iptxt = "IP:%s" % ifparm[0]
    print( "We got the IP : %s" % ifparm[0] )

##################################################################################


#### test the routine above ###

wifi_connect( "student12", "$unilab1" )

print( "Success !!!")