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G6EJD / ESP32-e-Paper-Weather-Display

An ESP32 and 2.9", 4.2" or 7.5" ePaper Display reads Weather Underground data via their API and then displays the weather
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DRAM segment data does not fit #123

Closed AndreasMainz closed 3 years ago

AndreasMainz commented 3 years ago

Hello,

i setup your sketch with 800x480 for 3 color display with an Esp32. It looks like the RAM runs out of limits with `dram0_0_seg' overflowed by 13144 bytes Any idea what to change in setup? The display already worked with example sketch without problems. I checked also several modules like WROVER chip, but still the same issue. Maybe any special library must be used?

Many thanks for any help..

G6EJD commented 3 years ago

This is a problem with the display and 3 colour as the GxEPD2 driver builds an image in ESP32 memory for transfer to the display buffer, so the solution is to use a half-size buffer and modify the screen update lines to keep refreshing the data until all has been transferred. There is a hint in the GxEPD2 examples for the half buffer example in essence the change required is the half size buffer display driver object if you go down the list of options you will find the half buffer version, then instead of display.update there is another method of a while loop I can’t remember the exact details but you’ll find the method in the examples for the library, I’ll try and provide an update soon. Although I haven’t checked recently have you looked through the display options for the larger screens someone may have already done it. About 3 lines of code to change no more than that.

G6EJD commented 3 years ago

See here: https://github.com/G6EJD/ESP32-e-Paper-Weather-Display/issues/115

G6EJD commented 3 years ago

Did you get it to work?

AndreasMainz commented 3 years ago

Yes you can close the issue. I didnt see the already closed issue115 about the same issue, sorry. But i decided to go to a python solution since the esp32 is at its limits for the 7in5 display. Maybe if you have time you could port your project to python ;-) make it run on raspbery pi.. Many thanks for your great project.

G6EJD commented 3 years ago

Ok good to hear you have a solution now.