Looking for the basics

Hamnet

Just got my first M5 device (M5paper), which is also my first experience of ESP32. I'm really missing the entry point and a full reference.

I've got it working with the Arduino IDE, and can compile and run a few of the samples. But as soon as I try to move beyond these, I'm missing the basic map and signposts.

For example, this sample code uses

canvas.drawJpgUrl("https://m5stack.oss-cn-shenzhen.aliyuncs.com/image/example_pic/flower.jpg");

it works, and that's fantastic. But now if I want to do something else with the WiFi just want to fetch a string from a URL, obviously there's a whole WiFi library which must support that - where do I find the documentation? Is there anywhere I can find the definition of canvas.drawJpgUrl?

Is this an M5-specific thing? Or an ESP32-generic thing? Is there a reference to the functions available?

TIA,

David.

felmue

Hello @Hamnet

some M5Paper specific APIs can be found here.

WiFi is part of the ESP32 and not M5Paper specific, so you probably best search for something like Arduino WiFi examples.

Thanks
Felix

silentmonkey

Hi David.

Check out https://randomnerdtutorials.com/esp32-web-server-arduino-ide/ the tutorials on this site are very good and there are loads of them. Remember your M5paper is basically an ESP32 with a in built touch screen display.

Hamnet

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.