I had a first look at the specification and the demo code.
The controller seems to support partial window addressing and most likely partial update.
"fast partial update" would require a special waveform table, seems not supported.
The price is high for the usual Arduino user, so I see no use to add support to GxEPD or GxEPD2, but who knows if there would be a sponsor or donator.
Hi ZinggJM!
I can't find the full refresh rate info in the specs.
Do you think that the waveform tables can be modified? (not a closed driver board as the Waveshare 7.5")
Anyways now I can't spend these money but if you still will need a sponsor when I'll have some money to spend I will do it with pleasure.
there might be a chance to modify the wavetables, although they are not documented.
I got these answers from Good Display:
As for 12.48 inch e paper display,Sorry we can't provide you.
Because our customer open this model, it belong them. so I can't provide you controller documents,
For 12.48" e-paper, now couldn't support partial refresh.
This e-paper looks interesting, and I would be tempted to buy it with the demo board. I could afford it.
But after the "big company" answer from Good Display about sponsoring the small e-papers to support for Arduino users, I currently have no interest to buy from Good Display.
If your enquiry for interest in big e-papers is successful, there might be other donators willing to step in.
ZinggJM:
Because our customer open this model, it belong them. so I can't provide you controller documents,
I didn't get their answer, they said that only a customer can have those documents or nobody can?
But after the "big company" answer from Good Display about sponsoring the small e-papers to support for Arduino users, I currently have no interest to buy from Good Display.
Also this is not clear, they're sponsoring you the small epapers?
If your enquiry for interest in big e-papers is successful, there might be other donators willing to step in.
We will see, I'm just curious to know the real need of those screens, out of the "shelf labels" and the "giant advertisement" world of E-ink.
The rights to the documents seem to belong to the original customer. They didn't event want to tell me the name or model of the controller used. But the commands look familiar or similar to the partial update capable controllers.
What it is pointed in this linked post is also the aim of mine (not very followed) question on large screens.
The community must be united in these things, sometimes I make too many questions but certainly I totally agree with you that a screen must be supported by the library before buying it (development purposes excluded, like you sponsors etc) and they should understand that, without full support, nobody is interested in their products.
The rights to the documents seem to belong to the original customer. They didn't event want to tell me the name or model of the controller used. But the commands look familiar or similar to the partial update capable controllers.
I misunderstood the "customer" word, of course they talked about a customer company, which wants to keep the documents closed.
In my opinion the important thing is the market, if a lot of people are interested in a product (e.g. large or small screens) the developer could have the power to obtain for free a 20€ screen for writing the library.
If they believe that nobody in the community is interested in that product they are not interested on giving away anything.
So the aim is:
to understand what people want (both your E-ink displays posts are centred in this way)
to make the companies aware of this demand to help the developer in writing the needed environment all around their products.
I disagree partly, because you don't understand the e-paper display market.
Good Display sells a large amount of e-paper displays to large customers.
The hobbyist market is a small segment added, and it is thanks to some sales persons that these e-paper displays became available to us. And thanks to Waveshare who serve also the hobby market with their development tools and boards.
Unfortunately Good Display does not understand the hobby and Arduino market. You will understand when you see the announced Arduino solution they will provide.
ZinggJM:
I disagree partly, because you don't understand the e-paper display market.
Good Display sells a large amount of e-paper displays to large customers.
The hobbyist market is a small segment added, and it is thanks to some sales persons that these e-paper displays became available to us. And thanks to Waveshare who serve also the hobby market with their development tools and boards.
I completely understand this, I talked about the shelf labels and wall advertisement markets, or the kindle/kobo one.
Of course the hobbyist are a small part of their mind but my thought was another one.
This is only my opinion but I think that it's not compulsory for them to enter this market, but if you decide to enter it you should take care about the hobbyists' issues.
So I was talking about the fact that some companies (Waveshare is very keen on our world and it's not in the "blacklist" as Good Display) enter our space without changing their behaviour, so they talk to an hobbyist as they would do with amazon.
You will understand when you see the announced Arduino solution they will provide.
I think I have the same ESP32, so I should have a chance to check your wiring. But an additional close-up picture of the connection to the processor would help. No, not the same, post a link, please.
I assume it doesn't work, as you ask to check. And if it doesn't, I would need to know which e-paper it is, post a link, please.
I see loose retainer on the FCP connector. It should be loose when inserting the flexible connector, but then you should push in on the black corners.
The pin labels on the epaper hat are unfamiliar
The pins on the DESPI-C02 correspond to the pins in my mapping suggestions, just RST is labeled RES and DC is D/C, DIN is SDI and CLK is SCK.
These are the pin positions I used after reaching out to others. Indeed, the epaper hat by good-display seems to befuddle a lot of people due to the odd pin labeling. You told us in one of your posts that good-display sells large numbers of these displays to commercial customers, so I wonder if this labeling (on the epaper hat) was at the behest of one of their customers.... because I have encountered no one who understands it.
I do not have an epaper display that is compatible with your work. I am the individual who asked if you would be willing to add one of the missing units (GDEW026T0).
I was looking for answer as to whether I have all the components required, or if a component (i.e. the epaper hat) would not work in the chain. Or, if I am missing something altogether.
You told us in one of your posts that good-display sells large numbers of these displays to commercial customers, so I wonder if this labeling (on the epaper hat) was at the behest of one of their customers.... because I have encountered no one who understands it
I am surprised. I had no such questions in my forum topics so far.
My wiring suggestions are for the Waveshare e-paper boards, and the inking on these boards.
The labeling is quite in line with names used on TFT SPI displays.
The DESPI-C02 is targeted to developers I think. The large number of these e-paper displays is connected directly to application boards containing the "reference circuit", the parts needed for the voltage generation.
I am the individual who asked if you would be willing to add one of the missing units (GDEW026T0).
And now you found out that this e-paper is out-of-stock and no longer available.
I was surprised about the number of e-papers Good Display has added recently to their web-pages (and the - in my view - incomplete and partially wrong information provided with).
So maybe they started to clear surplus stock. Not really good for reputation, I think.
But I was informed there are new e-paper displays coming next year, with better speed and slightly lower prices. This may be an explanation.
