sonoff-webthing

This project aims at integrating iTead Sonoff devices with Mozilla's proposed Web of Things API.

It is bleeding edge technology and it (currently) only supports:

Sonoff Basic (R2)

Features

WiFi configuration via SmartConfig, tested with this Android app
100% Web Thing compliant
Support mDNS
Automatic ~~signed~~ firmware update (OTA) by short-pressing the main button 10 times
Main button can be used to turn on/off the switch
Hard-reset by holding the button for more than 5 seconds
Visual feedback using the built-in LED

Usage

This project is a firmware, which require some hardware. You need a iTead sonoff compatible device. See the list of compatible devices at the top of this file. In this section, you will find instructions to install (flash) and use the sonoff-webthing firmware (this project).

Installation

You need esptool.py, a FTDI and a USB cable. Flashing a device might be scary but it is usually straightforward and relatively simple, especially if you stay calm and focused.

⚠️ DO NOT connect your device to mains AC (a.k.a. power coming from your outlet in your wall) when you want to flash it. This is not needed and EXTREMELY DANGEROUS.

It is possible that your device requires some hardware preparation. See this wonderful wiki page to prepare your device. For example, the Sonoff Basic R2 can be flashed by soldering a 4-pin header.

Connect your FTDI to your device and your FTDI to your computer using a USB cable

Backup the current firmware on your device (only needed once):

$ esptool.py --port /dev/usb read_flash 0x00000 0x100000 sonoff-orig.bin

Download the latest sonoff-webthing firmware located in the docs/ folder

Flash your device:

$ esptool.py -p /dev/usb erase_flash
$ esptool.py -p /dev/usb write_flash -fm dout -fs 1MB 0x00000 sonoff-webthing-signed.bin

That's it! You can now unplug the FTDI from your device. Replace the PCB in its enclosure and install the device as indicated in the iTead manual. Ready to power your device on? Keep reading!

Configuration

When the device is powered on, the LED should blink slowly: the device is ready to be connected to your WiFi. Use a SmartConfig application (like this one for Android) to configure the device with your WiFi credentials.

Once the LED is powered off, your device is fully operational. Some devices like the Sonoff Basic (R2) can be used manually but not all of them. The best way to make sure your device is working will be to control it via the Mozilla Things Gateway.

Manual usage

Sonoff Basic (R2): the button can be used as a regular on/off switch.

Mozilla Things Gateway

The device should automatically appear in the list of Thing devices. If not, try to reboot it or you can perform a hard reset by pressing the main button for more than 5 seconds and then releasing it.

Automatic update (OTA)

Press the main button 10 times to start the automatic update process. The LED should blink 5 times. If not, then retry. After that, the device will download the latest firmware hosted on GitHub. The LED might blink or might be on for some time, until the device restarts itself.

Development

⚠️ This section is incomplete, sorry for that! I use a Makefile and the command line to build firmware, not the Arduino IDE but this project can be opened, compiled and flashed via the Arduino IDE. Please follow this documentation to configure the Arduino IDE.

⚠️ This project requires the latest master version of webthing-arduino to avoid this issue.

Run make debug to build a development firmware and make release to build a production firmware.

License

sonoff-webthing is released under the "Mozilla Public License Version 2.0". Please see the bundled LICENSE file.

willdurand / sonoff-webthing