IoTit Flashing tool

IoTit (written in Golang) is an open source command-line utility for flashing (initializing) IoT devices.

The easiest way to get IoTit is to go to the Releases tab in this repository and download a precompiled binary that matches your OS and architecture.

If you are not sure about your computer details, take a look at this article

For other intallation methods see the installation section below.

IoTit contains a VirtualBox wrapper go-virtualbox, so it can only run on an OS that allows installation of VirtualBox.



golang >= 1.8

virtualbox >= 5.0



On macOS you can install IoTit from homebrew:

brew tap xshellinc/iotit && brew install iotit

Note: IoTit requires VM VirtualBox and Extension Pack to be installed on your machine.


NOTE Windows build is still experimental and you may experience problems flashing on windows 7

At this point we officaily do not support 32 bit windows (all versions)

You will need to install git-for-windows

Upon installing, you will need to add both git and Unix tools to the system PATH example screenshot

Windows PowerShell or CMD should be run as Administrator for IoTit to be able to write on external drives.

When flashing Intel® Edison make sure to provide external power supply. Flashing Intel® Edison under Windows will render it’s usb-ethernet adapter unusable under macOS and vice versa source.

USB-to-Serial drivers

Building from source

If you want to build binaries yourself, then follow the regular recommendations for go build

Note: Install all requirements before trying to build it on your local workstation:

go get ./...

Note: Although it is not required we recommend to install ssh-copy-id for flashing edison.


To build and run with debug log use:

./ && ./iotit


To see available commands launch iotit help

   iotit - Flashing Tool for IoT devices used by Isaax Cloud

   iotit [global options] command [command options] [arguments...]

     flash, f       Flash image to the device
     install, i     Install to global app environment
     uninstall, rm  Uninstall iotit
     update, u      Self-update
     log, l         Show log file location
     help, h        Shows a list of commands or help for one command

   --help, -h     show help
   --version, -v  print the version

For example here are the flash command flags:

$ iotit flash --help
   iotit flash - Flash image to the device

   iotit flash [command options] [device image]

   --quiet, --unattended, -q  Suppress questions and assume default answers
   --disk value, -d value     External disk or usb device
   --port value, -p value     Serial port for connected device. If set to 'auto' first port will be used.


During installation user can choose default virtualbox specs

Alternatively user can create their own vbox spec by choosing Create new virtual machine. This will create a spec file with a name of virtualbox and specs such as memory, cpu, vram etc, which is applied to iotit-box

To delete a custom virtual box preset, go to the iotit folder on your machine on macOS it is at/Users/{user}/.iotit. Open the file iotit-vbox.json in a text editor and delete the entry of the preset you want to remove. Entries are in the following form:

  "name": "test_vbox",
  "uuid": "c1fd7bca-4532-4796-b862-7c16be2d07f4",
  "template": "iotit-box",
  "device": "raspberry-pi",
  "description": "it is a test vbox",
  "option": {
    "cpu": 1,
    "memory": 512,
    "usb": {
      "vc": false,
      "type": {
        "2.0": false,
        "3.0": false
  "SSH": {
    "SSH": {
      "User": "root",
      "Server": "localhost",
      "Key": "",
      "Port": "2222",
      "Password": ""
    "Sudo": false,
    "SudoPass": ""


$HOME/.iotit - a directory containing iotit related files

$HOME/.iotit/mapping.json - a file containing different device types and urls of images to be downloaded

$HOME/.iotit/virtualbox/{version}/ - a packed virtual box image

$HOME/.iotit/images/{device}/{image_pack} - packed images grouped by device names

IoTit uses x64 virtualbox in order to flash and configure devices, because it allows to work with linux partitions and reduces installation requirements across different OSes

Currently 4 workflows are supported:

1 Edison:

  • copy installation files into virtualbox
  • run - to reflash edison
  • run edison_configure - to configure

2 SD:

  • copy installation files into virtualbox
  • mount the image partition into loop via losetup and mount
  • write configuration files into the image
  • write image into sd-card via dd or diskutil on macos

3 ESP-32/8266:

  • upload firmware and bootloader binaries over serial connection
  • configure module parameters using serial connection

4 Toradex Colibri

  • copy installation files into virtualbox
  • run and create img files
  • copy image files to SD card
  • connect to colibri module via serial
  • run update to flash linux to internal eMMC

VirtualBox uses alpine virtualbox image with additional software installed


and for Toradex:


Edison device is additionally mapped to the usb ports

Intel Edison [0310]
Intel USB download gadget [9999]


Provide image url or path to flash it on SD card.

STRUCTURE OF mapping.json:



If you do not specify any images for sub categeory it will choose whatever you have specified in the global image section. If you have more than one image in any image section you will be presented with a list when flashing.


DeviceMapping struct {
    Name      string
	Alias     string
    Sub       []DeviceMapping
    []Images  struct {
        Url    url
        Title  string


has a tree like structure - devices are listed using Name field, then devices are listed within Sub array and etc.

If a Sub device doesn’t have any image, then parent’s images are used instead.