https://github.com/mongoose-os-libs/ota-shadow

https://github.com/mongoose-os-libs/ota-shadow

Last synced: about 2 months ago
JSON representation

• Host: GitHub
• URL: https://github.com/mongoose-os-libs/ota-shadow
• Owner: mongoose-os-libs
• License: other
• Created: 2017-09-22T17:42:18.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2021-12-15T00:18:17.000Z (about 3 years ago)
• Last Synced: 2024-07-31T21:52:08.183Z (5 months ago)
• Size: 21.4 MB
• Stars: 6
• Watchers: 6
• Forks: 2
• Open Issues: 6
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-mongoose-os - ota-shadow

README

        
# OTA firmware update via the device shadow

## Overview

This library provides a way to update firmware Over-The-Air via the device

shadow mechanism.

In the text below, AWS IoT Shadow will be used.

It works by observing the `ota.url` entry in the device shadow. That entry must

be an URL with the valid Mongoose OS firmware, which is a .zip file.

When that entry is changed, this library downloads a firmware from that

URL and kicks off an OTA update. The sequence of actions is as follows:

- Receive shadow delta for `ota.url` - a new `ota.url` value

- Compare `ota.url` with file on flash. If it is the same as new value, stop

- If it is different, save new `ota.url` locally on flash

- Report new `ota_url`

- Trigger an OTA by downloading the .zip

- During the process, report numeric `ota.code` and string `ota.message`

  entries which indicates the status of the OTA in nearly real time

- On any failure, stop with the failure `ota.message`

- On success, reboot to the new firmware

- After reboot, commit the new firmware after the successful AWS IoT handshake

- If AWS IoT handshake does not happen during 5 minutes (the default commit

  timeout), rollback to the old firmare

- OTA failure keeps the `ota.url` delta uncleared

## How to trigger an OTA firmware update

Build and flash the https://github.com/mongoose-os-apps/demo-js app,

start the console, and provision to AWS IoT. Open the shadow GUI for the

device.

Upload built firmware to the

[Mongoose OS dashboard](https://mongoose-os.com/docs/mdash/intro.md)

and copy the firmware URL.

![](img1.png)

Change the `desired` shadow state by adding a section `ota` with `url` key:

```javascript

{

  "desired": {

    "ota": {

      "url": "https://mongoose-os.com/dashboard/ota/PATH/TO/APP.zip"

    },

    ...

  },

  ...

}

```

You can edit device shadow from the AWS IoT dashboard:

![](img2.png)

When it successfully finishes, it reboots and commits the firmware after the

AWS IoT handshake:

![](img3.gif)