Hello from Mikkeli EU codeweek!
Link to latest 22.214.171.124 release <- Use this to replicate my status, will boot to graphics, use this for official touchscreen, first run tutorial will be portrait!
It has been really busy week doing the Library of Babel proof of concept code for file uploads and preparing the SailPi tablet for prime time presentation at Mikkeli EU codeweek, I will link Mikkeli hacklab event coverage details where you can see me hacking it to use the RPi2 GPIO pins via a Python SailfishOS application.
Overall, the concept of a completely DIY tablet is quite enticing. Replacing of hardware is quite difficult to do these days, but on the SailPi tablet concept, quite much about everything is replaceable. SailfishOS is also proven to be very flexible, it displays well on both the official touchscreen, Adafruit PiTFT 3.5″ touchscreen and finally, any HDMI capable monitor or television can also do it. Issue is in the EGLFS driver, courtesy of Martin Brook’s (vgrade) excellent earlier adaptation for the original Raspberry Pi, running Mer and Nemo Mobile. This is not in any way his fault, since rendering EGL using the VideoCore is far from trivial, especially when adapted to Qt 5 libraries.
Overall cost has been something like this:
Official touchscreen + black frame: 58 British pounds = 78 euros
Raspberry Pi 2 Model B: 30 British pounds = 40.70
Sandisk UHS 1 16GB MicroSD card: 19,90 euros
The PiHut WiFi USB dongle: 6 British Pounds = 8.09 euros
20000mAh powerbank from eBay, when bought 16 euros, now 8 euros
Total cost: 146,69 euros
It is indeed possible to buy a cheap Chinese tablet for less than 100€ but the concept is what matters (at least to me it does). Flexibility of SailfishOS’s software combined with RaspberryPi2 hardware capabilities is an excellent combination. It is possible to do the setup even cheaper too.
The powerbank feature comes handy, especially when using the touchscreen. This gives 2 power inputs for the tablet, meaning that while charging the powerbank, you can use another charger as backup without downtime, just have the charger on the RPi2 and disconnect the powerbank from touchscreen.
Now some pictures (thank you aple for providing the camera + hot glue gun, Atte for a couple of wires and Markus for gluing the frame and powerbank extra support together, each and everyone from Mikkeli Hacklab for an excellent event):
Front view after a little bit misaligned gluing but no worries, I got some fingerprints to go with it 😀 !
Backview with the powerbank attached.
Bottom view from tablet.
Another bottom view.
Top (lost orientation, but I guess its top) views showing the GPIO ports not too badly blocked. The powerbank is leaning on the wires somewhat tightly.
But overall, the EU Codeweek even that was organized by Mikkeli Hacklab crew has been great fun, with talks on Open Finland Challenge by Teemu Ropponen (Open Knowledge Finland) and on API:Suomi by Jarkko Moilanen, I unfortunately could only attend on the API:Suomi event, where Jarkko provided a very interesting presentation on the current status of eg. APIOps movement and founding the Mikkeli API:Suomi organization with Mikko Lampi (also a founder and president of Mikkeli Hacklab).
Looking forward to organizing an event like this at Kuopio Hacklab, with lots of cool stuff to create with the crew and other volunteers. I thank the organizers and all the event participants for a great event!