This topic has been in discussions under various threads, and just to keep it separated, i opened a new thread.

So, OH with eInk display.

I have this at my desk


So maybe i can check could the arduino wire-slave to interface with Jolla.

Other links: http://www.adafruit.com/products/1346

Shortly about the BADGEr board (http://wyolum.com/projects/badger/) and connecting it to Jolla (reminder to self)

• It is Arduino compatible, and has I2C routed to "shield" connector, however it is connected through level converter TXS0108. It can only convert to higher voltages (as it is connected in such way). So I2C needs to be wired to SDA_3V3/SCL_3V3 signals
• ATMEGA328 datasheet has promising figure 31-309 showing VIH close to 1.8V when VCC=3.3V, but then table 29-19 gives VIH specifically for I2C 0.7xVCC (might or might not need level conversion)
• Powered by 3V coin cell, so connecting external 3.3V is no problem.
• Hook a opendrain GPIO to drive interrupt when display has been updated, and allow to shutdown.
• Eats WIF format from SD card, should be easy to modify to get that over I2C in some sort of packets. I think "streaming" is not feasible here (dunno)
• About Arduino Wire slave receiving data: http://arduino.cc/en/Tutorial/MasterWriter

I'm really looking forward to something useable here! eInk OH was in my top 3 ideas when the OH concept was revealed, all along extended battery and the allmighty keyboard.

Keep up the great work (please)!

Too bad you can't get a wysips sample and place it there layered in with the E-ink to both power the E-ink display plus charge the battery.

Maybe you can email the company and ask for a sample for this project. The wysips is transparent and layers with a touch screen. If you made an E-ink display other half that charges the phone and you got it on the market in the next 6 months in volume you would absolutely kill it, you would sell so many.

Just picture your phone is charging everytime you lay it face down on a table and the E-ink display has time, weather and notifications and you run a little inlay of glowpaint running in a line going around where the other half joins the front (or maybe a little higher up if that proves unable to absorb enough light) it would look like a mini steam box, that would be sick. Glowpaint sells the granules so that you can embed it into plastic.
And you could have a small pocket in it to insert a 128gb sd card and a usb 3.0 connection on it and you walk around with steam OS on it with all your steam games on it and you run steam OS live USB when you hook it to a computer.
Also the wysips on the e-ink would have LiFi and you could open garden app that shizzle to mesh network it with your other devices.

And then you could make a moga game pad type other half with the other half split in 2 with hinges and you flip it over and it locks with your left and right game controls with phone still in the center of gravity so you don't drop it and it also has the sd card pocket so that the sd card that you slipped out of your e-ink other half and that you have conveniently partitioned to be half steam OS and half android games so that you can have all the free to play moga enhanced games on it pop up because of nfc and also battery on this other half.

http://www.engadget.com/2013/12/04/y...hone-hands-on/

Something similar would be cool!

CNET also reviewed it. http://reviews.cnet.com/smartphones/...-35560814.html

Do you keep working on an eInk OH prototype, or are you focusing on other current projects (OLED and UART)? There is an awesome potential in the eInk project, such an OH could do what the OLED will do, plus some additional things, although it won't have colours.

ATM no progress on this eInk TOH.
Working on 'toholed', 'tohuart', and one other, and helping dirkvl with 'tohkbd'... and doing my dayjob too.

Maybe when i get some bandwith, but i assume there are some other people working on the eInk stuff somewhere ? huhuu haloo? are you there? come out loud!

Well, this is, for sure, a very interesting project.
However, there are only so many hours in a day and there are so many other cool projects as well...

On the technical side, so far, nearly all e-paper displays I found use SPI. iirc, I found none using i2c.
So, if someone has any pointers on e-paper displays with integrated i2c support, that'd be great.
Also, it seems like that the VCC may be a problem as well as we only have 3.3V out of the box and some displays require different voltages; some even require a set of different voltages.

Any further input is highly appreciated.

Edit:
This is likely OT in here but I just found the following display:
http://www.lcd-module.de/fileadmin/e...ogxl240-7e.pdf
This might fit better in the OLED thread.

Interesting prototype e-ink display accessory for Alcatel One Touch Hero:


I wonder if we can find the screen offered somewhere? The accessory is attached to the phone by a row of pogo pins, maybe it uses I2C too?

Some more info in the original article:
http://www.gsmarena.com/alcatel_one_...iew-1035p3.php