Mar 02

WebIOPi 0.7 release

Dear folk, I’m glad to announce the new WebIOPi release, tagged 0.7. I know it’s long time since the 0.6, almost a year, and I hope you will enjoy it.

The most important change is a global improvement of button handling on all browsers, including mobile and tablets. Without any change on the Cambot code, it now works really great on tablets and mobiles. Buttons are very responsive.

You will also find several new drivers, like a PiFaceDigital, MCP3002 ADC and 4802 DAC for people using a Gertboard, and a first Humidity sensor driver. I would like to thanks Craig and Michael for sharing their drivers.

There is other improvements and bug fixes, see detailed changelog below. You will also find complete code of all wiki tutorials in the 0.7 package.

As usual, entry point to downloads is the Google Project Page, but files are now hosted on SourceForge. Wiki will be updated within next days with new drivers and features.

Feel free to donate if you like WebIOPi and want to support it. I would like to thanks all donators from last months, WebIOPi may never been resumed without their generous support.

Stay tuned for a hot announcement in next weeks ;-)

Detailed 0.7 changelog :

  • improved touch device handling ( issue #73 )
  • updated jQuery library to version 1.11
  • added PiFaceDigital? driver
  • added PCF8591 ADC/DAC driver
  • added MCP3002 ADC driver
  • added MCP4802, MCP4812, MCP4822 ADC drivers
  • added HYT221 Humidity Sensor driver
  • added BMP180 Temperature & Pressure Sensor driver
  • added support of multiple MCP23Sxx on a single SPI CE line
  • added vref argument for MCP DAC and ADC ( issue #48 )
  • fixed devices monitor DAC display
  • allows PiClients? to run on others platforms than the Pi ( issue #46 )
  • general webiopi Python library improvements
Jan 26

WebIOPi Irrigation System

After the tutorial series, I’m please to announce the first official Irrigation System WebIOPi-based application. It can work with PiFace, IO PI, or any I/O expander supported by WebIOPi.

The system provides both manual and automatic mode, with a week schedule to activate each station in sequence for a given duration. Even for people who don’t have an irrigation system, it’s a very nice application to go more further with WebIOPi. On my side, it pointed me few issues and difficulties can encounter people when using the framework, so I can improve it.


Application is available on demand for US$15 (10€) and more donators and provided as a ZIP file containing a Python script, HTML, Javascript and CSS files as well as a README with installation and usage instructions. The code is well documented and can be easily customized by editing HTML and CSS files. You can see the customization made by Benjamin, who integrated the system with his existing WebIOPi applications.


Jan 14

WebIOPi Tutorials & SVN update

WebIOPi wiki has just been updated to complete existing devices tutorial as well as adding a new Serial tutorial. You should take a look on it quickly, by clicking following images.

Writing the Serial tutorial, I discovered a bug, which I immediately fixed and committed to SVN. You’ll find instructions to update WebIOPi in the tutorial.

You will also find all tutorials code on the SVN, in the trunk/tutorials folder. You should get it by updating your WebIOPi install.

I hope you will like it. I don’t plan to make more changes on the wiki, only typo correction and few formatting changes, so I can now focus on the code.

Don’t forget to regularly check hacker tips in the wiki tutorials menu, I may add useful tips.

Devices Tutorial

Serial Turorial

Jan 03

Happy New Year !

I hope you all enjoyed the end of 2013, and I would like to wish you all an Happy 2014 Year !

Coming CES will show new IoT tendencies with more IoT actors, products and services in the next year, all well packaged, but very closed, sometime inappropriate to hobbyists you are. WebIOPi intends to allows anyone making their own connected things, with a unique framework using best-practices and future proof protocols.

This year will be a key for WebIOPi, with a lot of things to do in the next month :

  • Wiki update and fixes
  • WebIOPi Development resume
  • WebIOPi Cooking Book
  • Special announcement

I hope to release a minor WebIOPi update containing bug fix during January as well as the whole wiki update. A new major release should come with the book later, for spring. You can refer to the bug tracker and the roadmap to get an idea of coming work. Stay tuned.


Dec 23

WebIOPi Tutorials

The WebIOPi wiki has been updated on last week end, with tutorials available, to help anyone building their own connected thing with the Raspberry Pi.

You can learn the WebIOPi framework basis, how to make your own Python script and your own UI. There is also a tutorial dedicated to macros, and one dedicated to devices. Don’t forget to check the hacker tips, to ease your life with WebIOPi.

You will also found a new description on the main project page, which I hope it will be clearer.


The other missing things on the wiki (Serial, I2C and SPI API) will be added early in january, stay tuned.

Dec 15

WebIOPi Donator Reward Program

Thanks to the previous calls, I received more than 100 answers to the survey in two weeks.
If not already done, you can still follow the survey. At this time, I can see few tendencies :

Satisfaction :
- People are mostly very satisfied with WebIOPi
- But most people complain about examples/tutorials/documentation
- About 50% people want a book
On short term, I will focus on documentation/wiki, code consistency, and improving existing features rather adding new features. I started to work on a new WebIOPi release and a book, both planned for spring.

Mobile application :
- about 50% people are willing to pay for a mobile application
- android phone is the most owned device, followed by android tablet, then ipad and iphone
On short/medium term, I’m considering an android application, then iOS.

Kickstarter :
- 75% people are ready for a kickstarter
- 50% people are willing to pay for special features
I may consider it on medium/long term, but I need to find out which new feature set could be paid or justify a kickstarter. Actually, donation program can replace it.

Donation :
Thanks to 20 generous donators, I received on the last two weeks, twice the amount of the past year. Making few estimates based on the survey, with 80 people considering donate, if most of them really donate, I will be able to focus on WebIOPi during a week or two.
I froze my outgoing Paypal activity since november and I will use the accumulated balance in January to purchase new materials and spend time on WebIOPi.
Please make donation, it will really help improving WebIOPi.

Seeing the results, I decided to launch the WebIOPi Donator reward program. All 2013 donators will be rewarded following this rules :

  • 10€ (15$) and more : Free WebIOPi Android or iOS App with early access (release tbd)
  • 20€ (30$) and more : + Free WebIOPi eBook (Spring 2014)
  • 50€ (75$) and more : + Personal support for your project

I’m really motivated, and want to bring something great, with less headaches for you.
I hope you will like this initiative, and you will continue to support me.

Donate in Euro Donate in USD

Dec 01

WebIOPi needs your help

I develop WebIOPi on my free time, spending long nights, week-ends and and job vacancies on the project, for the community. I started it seeing there was no true valuable REST API to remotely control Raspberry Pi GPIO. I then continued to improve it, integrating some user needs, and trying to make it the best Internet of Things framework for the Pi. With WebIOPi 0.6 you can directly use more than 30 devices, including analog, sensors, and more. It’s fully extensible and highly customizable. It reached a nice level and set of features, but still need to be improved. For instance, WebIOPi does not have real-time IO support.

I’m currently thinking to resume the development, but it will require a lot of time to bring something really great. I need your help to find the best way to get funds so I can focus on WebIOPi, speed-up the development, add features and improve the quality of both software and documentation.

Please take two minutes to complete this online survey, there is only 10 questions.

Donations are really appreciated, you can donate either in Euro or US Dollar :

Donate in Euro Donate in USD

Feel free to join the discussion on the google group.

Nov 28

WebIOPi future

Dear fans,

WebIOPi is alive for more than a year now, and last release was 8 month ago.
It has been used around 150000 times by 50000 users, I never expected such a success !
I’m thinking to resume the WebIOPi development, but I’m not sure where to go. There is much things that I wanted to do.
So how do you use WebIOPi ? What are the difficulties encountered and missing features ?
I’m also looking for a way to fund the project in order to work on it full-time for few weeks or months.
Feel free to join the discussion on the WebIOPi Google Group.
Apr 23

Raspberry Pi Networking Cookbook

Raspberry Pi Networking Cookbook is a new book from Packt Publishing. It aims to give a complete set of instructions to use your Pi as personal server.

The first chapter covers the usual Raspberry Pi presentation with requirements and instructions to boot the Pi for the first time and make basic configuration. Most people who already own and use a Raspberry Pi can skip this chapter. But a quick read is a good thing to remind few facts about the Pi and its possibilities.

In the second chapter, the reader learns how to connect to Pi using SSH. It’s nice to see examples from both Windows and Unix systems. It even covers the case of Raspberry reinstallation, when SSH does not recognize previous Raspberry SSH key. The chapter three then gives many basic Debian-based system (like Raspbian) tips to maintain the system, install and update packages.

Storage is completely covered in the chapter four. From adding USB or network storage, to making network sharing, this chapter give precise a concise instructions. This is very welcome for people who don’t Linux well because the Pi can definitely lacks of storage space. Then, with it’s low power consumption, the Pi is a good choice for a low cost file server. This allows to easy share between devices of your home network, very useful today with all those connecting things we can have at home : computers, tablet, phones, media players, tv… The only bad point is that only SAMBA network sharing is presented. FTP and and AFP (Apple/Mac) are both requirements on my side and for many users.

Finally, the fifth and last chapter explains few advanced setup and configuration :

  • Firewall setup and configuration, to protect your Pi from unauthorized access
  • RDP and VNC configuration, to remote graphically access your Pi Desktop
  • HTTP server with Apache, lighttpd, nginx
  • MediaWiki setup
  • Wireless Access Point

With all the features covered in this book, it’s a very good choice for people who don’t know where to start to use their Raspberry as a server. This is basically a set of commons Linux/Debian tasks, compiled into a single book.

There is one thing which disturbed me, a screen is required for the first steps of this book. In my mind, using a Pi as a server means never plug it to a display. On my side, I NEVER plugged any display to my Raspberry Pis since I’ve got one. First, SSH access is enabled by default on Raspbian since a while. Secondly, we can found the Raspberry network address using one of many network scanner. I really like Fing, which is freely available on Windows, Mac, Linux, iOS and Android. This two tips are enough to use the Pi from the setup without any display plugged in.

Then, I think two setup are missing : DHCP and DNS server, with DNSmasq for example. Most of home routers do not provide a decent DHCP server or local DNS and the Pi is a perfect candidate to do that, thanks of its low power consumption. This is a really advanced features, and most people can afford with their existing setup.

I really liked all links and sources to the software used in the book. With all clear instructions and informations given, anyone should be able to build the perfect server for their need using a Raspberry Pi, low cost and low energy.

This book is already available at Packt Publishing and Amazon.

Mar 31

RPIDOM et WebIOPi : 1-Wire

Il y a quelques temps, j’ai reçu une carte RPIDOM fabriquée par les français de YADOM. Cette carte apporte 2 éléments manquant au Raspberry Pi, à savoir un contrôleur 1-Wire et une horloge RTC. Par ailleurs, elle dispose de deux entrée de type TéléInfo, qui permet de se brancher à un compteur EDF pour la relève de la consommation instantanée.

Aujourd’hui, je vais vous présenter l’utilisation du contrôleur 1-Wire et comment s’en servir directement avec WebIOPi sans installation supplémentaire. La notice du RPIDOM nous recommande d’installer OWFS mais l’opération, bien que facile, peut encore être simplifiée. En effet, il est possible d’utiliser le contrôleur directement sans passer par OWFS, simplement en chargeant les modules adéquats sans installation supplémentaire.

$ sudo modprobe wire          # chargement du module 1-Wire principal
$ sudo modprobe w1_therm      # chargement du module capteur de température
$ sudo modprobe i2c_bcm2708   # chargement du module I2C principal
$ sudo modprobe ds2482        # chargement du module permettant d'utiliser le contrôleur

# enfin, on enregistre le pont sur l'interface I2C
# pour les Raspberry révision 1, il faut remplacer i2c-1 par i2c-0
$ echo ds2482 0x18 | sudo tee /sys/bus/i2c/devices/i2c-1/new_device

# si un capteur 1-Wire est branché, il devrait alors être detecté
$ cat /sys/bus/w1/devices/w1_bus_master1/w1_master_slaves

# on peut alors lire la temperature
$ cat /sys/bus/w1/devices/28-0000049c7a8d/w1_slave
76 01 4b 46 7f ff 0a 10 79 : crc=79 YES
76 01 4b 46 7f ff 0a 10 79 t=23375

Il est tout a fait possible d’utiliser WebIOPi 0.6 pour lire la température en enregistrant le capteur dans le fichier de configuration /etc/webiopi/config :

rpidom-temp = DS18B20 slave:28-0000049c7a8d

Après redémarrage de WebIOPi, on peut voir la température dans le Devices Monitor, plutôt simple non ?

Libre à vous d’utiliser alors l’une des nombreuses API et bibliothèque de WebIOPi pour utiliser les composants branchés à l’interface 1-Wire. Tous les capteurs de température 1-Wire (DS18*) ainsi que le switch DS2408 sont déjà supportés par WebIOPi.

Il est possible de charger les modules au démarrage, via le fichier /etc/modules. Mais il faut pour l’instant enregister le pont sur le bus I2C à la main. Je vais regarder pour simplifier toute la démarche en l’intégrant directement dans WebIOPi.

Dans des prochains billets je parlerai de l’horloge RTC fournie, puis de la relève TéléInfo.