This is the v1.22.0 version of the MicroPython documentation. The latest development version of this page may be more current.

Quick reference for the WiPy

WiPy pinout and alternate functions table

Below is a quick reference for CC3200/WiPy. If it is your first time working with this board please consider reading the following sections first:

General board control (including sleep modes)

See the machine module:

import machine

help(machine) # display all members from the machine module
machine.freq() # get the CPU frequency
machine.unique_id() # return the 6-byte unique id of the board (the WiPy's MAC address)

machine.idle()        # average current decreases to (~12mA), any interrupts wake it up
machine.lightsleep()  # everything except for WLAN is powered down (~950uA avg. current)
                      # wakes from Pin, RTC or WLAN
machine.deepsleep()   # deepest sleep mode, MCU starts from reset. Wakes from Pin and RTC.

Pins and GPIO

See machine.Pin.

from machine import Pin

# initialize GP2 in gpio mode (alt=0) and make it an output
p_out = Pin('GP2', mode=Pin.OUT)

# make GP1 an input with the pull-up enabled
p_in = Pin('GP1', mode=Pin.IN, pull=Pin.PULL_UP)
p_in() # get value, 0 or 1


See machine.TimerWiPy and machine.Pin. Timer id’s take values from 0 to 3.:

from machine import Timer
from machine import Pin

tim = Timer(0, mode=Timer.PERIODIC)
tim_a =, freq=1000)
tim_a.freq(5) # 5 Hz

p_out = Pin('GP2', mode=Pin.OUT)
tim_a.irq(trigger=Timer.TIMEOUT, handler=lambda t: p_out.toggle())

PWM (pulse width modulation)

See machine.Pin and machine.Timer.

from machine import Timer

# timer 1 in PWM mode and width must be 16 buts
tim = Timer(1, mode=Timer.PWM, width=16)

# enable channel A @1KHz with a 50.55% duty cycle
tim_a =, freq=1000, duty_cycle=5055)

ADC (analog to digital conversion)

See machine.ADCWiPy.

from machine import ADC

adc = ADC()
apin ='GP3')
apin() # read value, 0-4095

UART (serial bus)

See machine.UART.

from machine import UART
uart = UART(0, baudrate=9600)
uart.write('hello') # read up to 5 bytes

SPI bus

See machine.SPI.

from machine import SPI

# configure the SPI controller @ 2MHz
spi = SPI(0, SPI.CONTROLLER, baudrate=2_000_000, polarity=0, phase=0)
spi.write('hello') # receive 5 bytes on the bus
rbuf = bytearray(5)
spi.write_readinto('hello', rbuf) # send and receive 5 bytes

I2C bus

See machine.I2C.

from machine import I2C
# configure the I2C bus
i2c = I2C(baudrate=100000)
i2c.scan() # returns list of peripheral addresses
i2c.writeto(0x42, 'hello') # send 5 bytes to peripheral with address 0x42
i2c.readfrom(0x42, 5) # receive 5 bytes from peripheral
i2c.readfrom_mem(0x42, 0x10, 2) # read 2 bytes from peripheral 0x42, peripheral memory 0x10
i2c.writeto_mem(0x42, 0x10, 'xy') # write 2 bytes to peripheral 0x42, peripheral memory 0x10

Watchdog timer (WDT)

See machine.WDT.

from machine import WDT

# enable the WDT with a timeout of 5s (1s is the minimum)
wdt = WDT(timeout=5000)

Real time clock (RTC)

See machine.RTC

from machine import RTC

rtc = RTC() # init with default time and date
rtc = RTC(datetime=(2015, 8, 29, 9, 0, 0, 0, None)) # init with a specific time and date

def alarm_handler (rtc_o):
    # do some non blocking operations
    # warning printing on an irq via telnet is not
    # possible, only via UART

# create a RTC alarm that expires after 5 seconds
rtc.alarm(time=5000, repeat=False)

# enable RTC interrupts
rtc_i = rtc.irq(trigger=RTC.ALARM0, handler=alarm_handler, wake=machine.SLEEP)

# go into suspended mode waiting for the RTC alarm to expire and wake us up

SD card

See machine.SD.

from machine import SD
import os

# clock pin, cmd pin, data0 pin
sd = SD(pins=('GP10', 'GP11', 'GP15'))
# or use default ones for the expansion board
sd = SD()
os.mount(sd, '/sd')


See network.WLAN and machine.

import machine
from network import WLAN

# configure the WLAN subsystem in station mode (the default is AP)
wlan = WLAN(mode=WLAN.STA)
# go for fixed IP settings
wlan.ifconfig(config=('', '', '', ''))
wlan.scan()     # scan for available networks
wlan.connect(ssid='mynetwork', auth=(WLAN.WPA2, 'mynetworkkey'))
while not wlan.isconnected():
# enable wake on WLAN
wlan.irq(trigger=WLAN.ANY_EVENT, wake=machine.SLEEP)
# go to sleep
# now, connect to the FTP or the Telnet server and the WiPy will wake-up

Telnet and FTP server

See network.Server

from network import Server

# init with new user, password and seconds timeout
server = Server(login=('user', 'password'), timeout=60)
server.timeout(300) # change the timeout
server.timeout() # get the timeout
server.isrunning() # check whether the server is running or not

Heart beat LED

See wipy.

import wipy

wipy.heartbeat(False)  # disable the heartbeat LED
wipy.heartbeat(True)   # enable the heartbeat LED
wipy.heartbeat()       # get the heartbeat state