Hello @Hamnet correct, to continue to use M5EPD you either need to revert to Arduino 1.8 IDE (which worked for you in the past). Or you can try to comment out the lines mentioned in GT911.cpp and use Arduino IDE 2.x. The latter I tried myself and worked for me. Thanks Felix

Hello felix, seems to work, thanks. Will see how long m5paper could work without charge. Fred

@felmue Thank you so much Felix, you've helped me again.

@casascius Interesting. In my case I'm using real certs from my cloud and it works. I don't know how a DNS name would work outside of localhost names. My main issue stated above was that I want a connection to stay open, and I wasn't able to figure that out. thanks.

@ajb2k3 To clarify, I think you're implying that some of the other APIs are available to me on M5Paper, but some aren't - is that correct? Yes, correct. Is there any way to tell which ones can and which can't? Is it API by API, or is it more granular - certain functions documented under other APIs are available? For example, are the functions under https://docs.m5stack.com/en/api/core/power available - lightSleep, deepSleep etc? Thanks again for all the help.

Thanks Felix and @ajb2k3. I've found the root of my problem, which is that I was using a different update mode (DU4) in the loop than in the setup (GC16). From this I infer that there are least two buffers in a canvas (one for graphics, one for text); since when I pushed the canvas shifted to a different position, using DU4, it placed the text in a shifted position, but didn't update the graphic. Is that correct, and are there more than two buffers?

Hello @Hamnet it takes time for a new board to be included in Arduino and subsequently into PlatformIO. So when M5Paper came out the easiest way to create an M5Paper PlatformIO project, was to take a similar board, in this case M5Stack Fire, which was already available. (The key here is that both M5Stack Fire and M5Paper use PSRAM.) And later on, I guess, M5Stack engineers simply forgot to fix that. Thanks Felix

Thank you both Felix and @silentmonkey. I'm navigating the M5 docs, but as I've whinged elsewhere, although they give function signatures (not complete I think, e.g. I've seen examples which don't match the reference) I'm missing context. In relation to HTTP, there seem to be a lot of different Arduino libraries - copy and pasting from random examples on the internet has got me somewhere, but is there any guidance for a newbie as to the 'good' ones to go for? For example I'm currently able to fetch data from 'http:' URL, but not 'https:' - although the canvas.drawJpgUrl example function uses an 'https:' URL and that works... Thanks again for responding.