Hello Rob,
It seems that the memory is not completely erased by the clear_screen procedure. I made a work around that overwriting all 8 lines of text with spaces, so that the unwanted pixels disappear. Furthermore, I saw that only the 5x7 and the 6x8 fonts works, the larger one doesn't. It's hard not to be able to test with the right display, so for now I'm waiting to see what you can discover. Kind regards, Bill. On Tuesday, January 20, 2026 at 6:47:41 PM UTC+1 Rob CJ wrote: > Hi Bill, > > Thanks for the info. I expect the LCD's to arrive soon so I can test it > myself. > > Strange all those random pixels (I assume after clear display. It may be > that the shift 1 pixel to the left may be caused by the fact that this > controller support 132x64 while the SSD1306 supports 128x64 and I still > used 128x64 in this library but I will test that too. I head something > similar from Rob Hamerling to add an offset. > > I noticed when testing the SSD1306 library that some scrolling > funtionality only worked for the version with SPI and not IIC. I do not > know why that is. > > As soon as I get it all working I will send you an update. > > Kind regards, > > Rob > > > > ------------------------------ > *Van:* [email protected] <[email protected]> namens Bill Beek > <[email protected]> > *Verzonden:* dinsdag 20 januari 2026 16:37 > > *Aan:* jallib <[email protected]> > *Onderwerp:* Re: [jallib] Re: Update SSD1306 library supporting bigger > font > I meant Horizontal and diagonal scrolling. > > > On Tuesday, January 20, 2026 at 4:33:27 PM UTC+1 Bill Beek wrote: > > Hi Rob, > > You're on the right track, that addressing also gave me some problems to > figure out. > > I'll send some pictures so you can see what's happening on the display. > > The "8" at the bottom left has been moved 1 position so that the full > character is visible. > > That is not a big problem. Only the vertical scrolling functions work, > the horizontal and > > vertical ones don't. > > And of course the unwanted pixels are the problem as far as I've been able > to discover, > > as you can see in the pictures. > > Kind regards, Bill. > > > On Monday, January 19, 2026 at 6:58:17 PM UTC+1 Rob CJ wrote: > > Hi Bill, > > I had a detailed look at the datasheet of the SH1106 and saw that setting > the device on a certain position works differently so I changed that. This > way of positioning the device uses a page addressing mode. This mode is > also available in the SSD1306 but there the library uses horizontal > addressing mode and so a different method is used. You can also select the > page addressing mode on the SSD1306 and then the same approach is used as > in the SH1106. > > Not sure if this solves all problems but this version will not work on the > SSD1306 since the command to select the addressing mode is not present in > the SH1106 so I removed that command in total to prevent any side effects. > In the future it might be possible to make one library for both (maybe with > a 'define') but maybe it is better to keep them separate otherwise the > library name should change to glcd_ssd1306_sh1106. > > If this does not work then you have to wait until I can test it myself. > > Kind regards, > > Rob > > > > ------------------------------ > *Van:* [email protected] <[email protected]> namens Rob CJ < > [email protected]> > *Verzonden:* zondag 18 januari 2026 16:28 > *Aan:* [email protected] <[email protected]> > > *Onderwerp:* Re: [jallib] Re: Update SSD1306 library supporting bigger > font > Hi Bill, > > OK. These where settings that supposed to work for both. I will do some > more research and will test it first myself before sending an update. > > Kind regards, > > Rob > > ------------------------------ > *Van:* [email protected] <[email protected]> namens Bill Beek > <[email protected]> > *Verzonden:* zondag 18 januari 2026 16:15 > *Aan:* jallib <[email protected]> > *Onderwerp:* Re: [jallib] Re: Update SSD1306 library supporting bigger > font > > The latest lib make it worst, both displays are now up side down. > And the 1306 is now messy and the 1106 behavior is further unchanged. > Kind regards, Bill. > On Sunday, January 18, 2026 at 3:45:30 PM UTC+1 Bill Beek wrote: > > Hi Rob, > Only for the video together, when used > separately the same results on the display > > > > > On Sunday, January 18, 2026 at 3:21:23 PM UTC+1 Rob CJ wrote: > > Hi Bill, > > Are you using both at the same time on the same IIC bus with the same IIC > address? That may give problems. > > I updated the library and used other initialization settings that I > received from the other Rob. They should work both for the ssd1306 as well > as for the sh1106. > > Kind regards, > > Rob > > ------------------------------ > *Van:* [email protected] <[email protected]> namens Bill Beek > <[email protected]> > *Verzonden:* zondag 18 januari 2026 12:41 > > *Aan:* jallib <[email protected]> > *Onderwerp:* Re: [jallib] Re: Update SSD1306 library supporting bigger > font > > my mistake > > > -- > You received this message because you are subscribed to the Google Groups > "jallib" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion visit > https://groups.google.com/d/msgid/jallib/c6d86474-5d12-4826-b55a-a4c2d74f2e69n%40googlegroups.com > > <https://groups.google.com/d/msgid/jallib/c6d86474-5d12-4826-b55a-a4c2d74f2e69n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > -- > You received this message because you are subscribed to the Google Groups > "jallib" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion visit > https://groups.google.com/d/msgid/jallib/8e75facb-27fd-4700-89f4-592250bc2e2an%40googlegroups.com > > <https://groups.google.com/d/msgid/jallib/8e75facb-27fd-4700-89f4-592250bc2e2an%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > -- > You received this message because you are subscribed to the Google Groups > "jallib" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion visit > https://groups.google.com/d/msgid/jallib/AM6PR02MB4053C37C61C5EC28C09619D8E68BA%40AM6PR02MB4053.eurprd02.prod.outlook.com > > <https://groups.google.com/d/msgid/jallib/AM6PR02MB4053C37C61C5EC28C09619D8E68BA%40AM6PR02MB4053.eurprd02.prod.outlook.com?utm_medium=email&utm_source=footer> > . > > -- > You received this message because you are subscribed to the Google Groups > "jallib" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion visit > https://groups.google.com/d/msgid/jallib/ae6bfd7c-b7d3-47ca-8dc8-b3fab5174eddn%40googlegroups.com > > <https://groups.google.com/d/msgid/jallib/ae6bfd7c-b7d3-47ca-8dc8-b3fab5174eddn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "jallib" group. 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