1. Quickstart Guide

Let’s start with a quick description of what to do after you unpack your brand new toy. Our aim is not to bug you with complex details about it, but instead get you as quick as possible to the point you can start doing useful things with your board.


It is strongly recommended to update the firmware on your board before starting to code. The update proceedure is described in Firmware Upgrades below.

This chapter help you with unboxing and getting started with your device.

If you come across any issues along the way, there is a Troubleshooting section that addresses the common problems. In case you can not find the answer to your issue, you can always ask questions in our Forum.

1.1 Unboxing and the Expansion Board

The best way to learn something new is by doing it! Lets get started setting up your Pycom board. First, we’ll need to put together:

  1. Look for the reset button on your module (located at a corner of the board, next to the LED).
  2. Look for the USB connector on your expansion board.
  3. Insert the module on the expansion board with the reset button pointing towards the USB connector.

It’s that simple! If you want to confirm your work, here’s a picture showing how to correctly align your device with the expansion board:

Correct placement

If you prefer video tutorials, here is a video showing these steps. It applies to all our modules.


Some modules such as the LoPy, will cover the USB connector. This is normal; just remember to keep the orientation as shown above.

To ensure the longevity of your expansion board, please be aware of the following:

  • Be gentle when plugging/unplugging the USB cable. Whilst the USB connector is soldered and relatively strong, it can break off and is be difficult to fix.
  • Static electricity can damage components on the board and may destroy them. If you experience a lot of static electricity in your area (e.g. dry and cold climates), take extra care not to shock the device. If your device came in a ESD bag (Silver packaging), the best way to store and carry the device is inside this bag as it will be protected against static discharges.

Expansion Board Details

Details regarding the hardware specifics for the expansion board can be found here.

The pinout for the expansion board can also be found in chapter 5. Datasheets

1.2 Connecting Over USB

Once you’re sure everything is in place, you’re ready to start programming the device. It is time to turn your board on. Just plug it into a USB socket (either on your computer or using a battery charger).

In a few seconds, the LED should start blinking every 4 seconds. This means that everything is working correctly! If you cannot see the blinking, please disconnect the power supply and re-check the board’s position on the expansion board.

LED blinking

1.3 Firmware Upgrades

We strongly recommend you to upgrade your firmware to the latest version as we are constantly making improvements and adding new features to the devices.

Here are the download links to the update tool. Please download the appropriate one for your OS and follow the instructions on the screen.

Previous versions of firmware are available for download on the Pycom website.

Firmware upgrader

The instructions given by the updater tool should be followed carefully. The basic procedure can be found below:

  • Disconnect your device from your computer
  • Connect a jumper cable or wire between G23 and GND
  • Reconnect the board via USB to your computer
  • Run the Firmware Upgrade tool
  • Remove the G23 to GND jumper cable/wire
  • Reboot the device (button or power off then on)

Connecting G23 and GND puts the device in ‘firmware update mode’. This mode is only used for updating the device’s firmware using the Firmware Update tool.

After you’re done with upgrading, you can use the Pymakr Plugins to upload and run programs in your device.

If you have an open Telnet connection or Pymakr Plugin connected, the version can found be with the following commands:

import os


Make sure the TX jumper is present on your expansion board, as the jumpers sometimes come loose in the box during transport. Without this jumper, the updater will fail.

1.4 Connecting to the Board’s WiFi

Once the device’s firmware has been updated, restart the device (press the button next to the LED) and it will boot into a WiFi broadcast mode (Access Point). This allows you to connect to the device’s internal server in order to upload files/scripts as well as change configuration settings.

WiFi Icon

Open the network settings on your computer and you will see an SSID appear with a name, similiar to the following name lopy-wlan-xxxx, wipy-wlan-xxxx, etc. Connect to the network and enter the password www.pycom.io. Once you’re connected to the device’s network, you can open start programming in MicroPython or upload scripts to your device!


When connected to the board’s network, you will not be able to access the internet from your computer! You will need to reconnect to your home/office WiFi before continuing to browse this documentation.

1.5 Device Registration

Some of our devices require registration before you can utilise specific features. Please see the list below for setup guides to ensure that your device is registered and activated on the various platforms required to access all of the available features.


Not all Pycom devices require activation; most features work immediately out of the box! Currently the registration/activation only applies to the SiPy, in order to connect it to the Sigfox Network.

1.6 Introduction to MicroPython

Our boards work with Micropython; a Python 3.5 implementation that is optimised to run on microcontrollers. This allows for much faster and more simple development process than using C.


Booting into MicroPython

When booting, two files are executed automatically: first boot.py and then main.py. These are placed in the /flash folder on the board. Any other files or libraries can be placed here as well, and can be included or used from boot.py or main.py.

The folder structure in /flash looks like the picture below. The files can be managed either using FTP or using the Pymakr Plugin.

File structure

Tips & Tricks

Micropython shares majority of the same syntax as Python 3.5. The intention of this design is to provide compatibility upwards from Micropython to Python 3.5, meaning that code written for Micropython should work in a similar manner in Python 3.5. There are some minor variations and these should taken viewed as implementation differences.

Micropython also has a number of Micropython specific libraries for accessing hardware level features. Specifics relating to those libraries can be found in the Firmware API Reference section of this documentation.


Micropython, unlike C/C++ or Arduino, does not use braces {} to indicate blocks of code specified for class and function definitions or flow control. Blocks of code are denoted by line indentation, which is strictly enforced.

The number of spaces in the indentation is variable but all statements within a block must be indented the same amount.

Variable Assignment

As with Python 3.5, variables can be assigned to and referenced. Below is an example of setting a variable equal to a string and then printing it to the console.

variable = "Hello World"

Conditional Statements

Conditional statements allow control over which elements of code run depending on specific cases. The example below shows how a temperature sensor might be implemented in code.

temperature = 15
target = 10

if temperature > target:
    print("Too High!")
elif temperature < target:
    print("Too Low!")
    print("Just right!")

Loops (For & While loop)

Loops are another important feature of any programming language. This allows you to cycle your code and repeat functions/assignments/etc.

For loops allow you to control how many times a block of code runs for within a range.

x = 0
for y in range(0,9):
    x += 1

While loops are similar to For loops, however they allow you to run a loop until a specific conditional is true/false. In this case, the loop checks if x is less than 9 each time the loop passes.

x = 0
while x < 9:
    x += 1


Functions are blocks of code that are referred to by name. Data can be passed into it to be operated on (i.e., the parameters) and can optionally return data (the return value). All data that is passed to a function is explicitly passed.

The function below takes two numbers and adds them together, outputting the result.

def add(number1, number 2):
    return number1 + number2

add(1,2) # expect a result of 3

The next function takes an input name and returns a string containing a welcome phrase.

def welcome(name):
    welcome_phrase = "Hello, " + name + "!"

welcome("Alex") # expect "Hello, Alex!"

Data Structures

Python has a number of different data structures for storing and manipulating variables. The main difference (regarding data structures) between C and Python is that Python manages memory for you. This means there’s no need to declare the sizes of lists, dictionaries, strings, etc.

# lists - a data structure that holds an ordered collection (sequence) of items

networks = ['lora', 'sigfox', 'wifi', 'bluetooth', 'lte-m']
print(network[2]) # expect 'wifi'

# dictionaries - a dictionary is like an address-book where you can find the address or contact details of a person by knowing only his/her name, i.e. keys (names) are associate with values (details)

address_book = {'Alex':'2604 Crosswind Drive','Joe':'1301 Hillview Drive','Chris':'3236 Goldleaf Lane'}
print(address_book['Alex']) # expect '2604 Crosswind Drive'

# tuple - similar to lists but are  immutable, i.e. you cannot modify tuples after instantiation

pycom_devices = ('wipy', 'lopy', 'sipy', 'gpy', 'fipy')
print(pycom_devices[0]) # expect 'wipy'


For more Python examples, check out these tutorials. Be aware of the implementation differences between Micropython and Python 3.5.

1.7 Connecting a Board using Pymakr Plugin

To make it as easy as possible we developed a series of tools known as the Pymakr Plugins, which allow you to connect to and program your Pycom devices. These Plugins have been built for a number of text editors and IDEs to allow for users to choose their favourite development environment.

Pymakr Plugin Logo

Extended info about these Plugins, such as how to use the Pycom console and other features can be found under Tools & Features.


If you have any trouble connecting over USB using the Pymakr Plugins, make sure you have the correct FTDI drivers installed.


Please be aware that Pymakr IDE has been retired and that plugins for Atom, Sublime, Visual Studio Code & PyCharm are under development, with intention to replace Pymakr. Currently, users are advised to use an FTP client such as FileZilla to upload code/projects to their devices. You can find instructions on how to do this, in the tools section of the documentation. Please read this forum post for more information.

Installing Pymakr Plugin (Atom)

For beginners, users getting started with MicroPython & Pycom as well as Atom text editor users, we recommend the Pymakr Plugin for Atom. This section will help you get started using the Atom Text Editor & Pymakr Plugin.

Atom Text Editor

Please follow these steps to install the Pymakr Plugin:

  1. Ensure that you have Atom installed and open.
  2. Navigate to the Install page, via Atom > Preferences > Install
  3. Search for Pymakr and select the official Pycom Pymakr Plugin.
  4. You should now see and Install button. Click this to download and install the Pymakr Plugin.
  5. That’s it! You’ve installed the Pymakr Plugin for Atom.

Initial Configuration (Atom)

After installing the Pymakr Plugin, you need to take a few seconds to configure it for the first time. Please follow these steps:

  1. Connect your computer to the WiFi network named after your board (e.g. lopy-wlan-xxxx, wipy-wlan-xxxx). The password is www.pycom.io
  2. Open Atom and ensure that the Pymakr Plugins are installed.
  3. In the menu, go to Atom > Preferences > Packages > Pymakr.
  4. By default, the Address should be listed as If not, change this to
  5. The default username and password are micro and python, respectively.
  6. You settings will be saved automatically.
Pymakr Plugin settings


The Pymakr Plugins also support wired connections (Serial USB). Instead of typing the IP address, you can enter the Serial USB address (Mac/Linux) or COM Port (Windows) of your device. Our boards don’t require any username or password for the serial connection, so you can leave those fields empty. For more information, please visit Tools & Features.

That’s it for the first time configuration. In the lower portion of the screen, you should see the console, with the connection process taking place. At the end of it, you’ll get a ‘Connecting on’ message and a >>> prompt, indicating that you are connected:

Pymakr Plugin REPL

Creating a Project

The Pymakr Plugins have a feature to sync and run your code on your device. This can be used for both uploading code to your device as well as testing out scripts by running them live on the device. The following steps will get you started.

Pymakr Plugin Overview
  • In Atom, go to File > Add Project Folder.
  • Create a new folder within the prompt and give it a name. Then select open to initialise this as a project folder. You may also use an existing folder if you choose.
  • Create two files: main.py and boot.py, if you don’t already have those.


You can also use FTP to download boot.py and main.py from the board to your project folder. This is commonly used when copying large numbers of files to a Pycom board.

The boot.py file should always start with following code, so we can run our python scripts over Serial or Telnet. Newer Pycom boards have this code already in the boot.py file.

from machine import UART
import os
uart = UART(0, 115200)

Many users, especially the WiPy users, will want a WiFi script in the boot.py file. A basic WiFi script but also more advanced WLAN examples, like fixed IP and multiple networks, can be found in the WiFi Examples chapter. The script below connects to your network and prints out your device’s local IP address.

from machine import UART
from network import WLAN
import os
uart = UART(0, 115200)

wlan = WLAN(mode=WLAN.STA)

wlan.connect(ssid='Your Network SSID', auth=(WLAN.WPA2, 'Your Network Password'))

while not wlan.isconnected():

print(wlan.ifconfig()) # prints out local IP to allow for easy connection via Pymakr Plugin or FTP Client

Besides the neccesary main.py and boot.py files, you can create any folders and python files or libraries that you want to include in your main file. The Pymakr Plugin will synchronize all files in the project to the board when using the Sync button.


When synchronizing your project to the board, ensure the REPL console is ready. If any programs are running or the board is still booting, synchronization may fail.

Running Your Code

If you want to test some code on the module, you can create a new file or open an existing one and then press the Run button. This will run the code directly onto the Pycom board but it will not upload/sync to the board.


The changes you make to your file won’t be automatically saved to the board upon restarting or exiting the Run feature, as the Pycom board will not store this code.

Coding Basics

For fun, lets try again to build a traffic light. Add the following code to the main.py file:

import pycom
import time
for cycles in range(10): # stop after 10 cycles
    pycom.rgbled(0x007f00) # green
    pycom.rgbled(0x7f7f00) # yellow
    pycom.rgbled(0x7f0000) # red
  • Make sure the connection to your board is open in the Pycom Console
  • Press the Sync button at the top of the Pycom Console. Any progress will be shown in the console.

Here is the expected result:

Traffic light

You now have a traffic light in your hands! To stop a running program, use ctrl-c or click Cancel on the console. You can also reboot the board by pressing the physical reset button.


If your board is running code at boot time, you might need to boot it in safe mode.