@felmue Thank you for the explanation and the link :)

Hi,
I have a basic question arising from lack of examples.

I am referring to
https://docs.m5stack.com/en/api/m5paper/epd_canvas
in order to set different grey scales for text on a canvas.

I tried values from 0 to 15, 0x00, 0x0F, 0xFF and so on and found only 3 grey shades working.
Can someone please specify which are the different values to be passed in as the first argument to canvas.setTextColor() in order to achieve the 16 different grey scale variants?

Thanks,
Zitrone

@felmue Thank you for the quick reply.
Yes, it works perfectly. :)

Hi folks,

I just started using M5 paper and went through the documentation at
https://docs.m5stack.com/en/api/m5paper/epd_canvas

Using this info, I created a canvas with some content in the setup.
Then, in the loop I wish to clear the canvas and display some other content.
The code is as follows :

#include <M5EPD.h>
M5EPD_Canvas canvas(&M5.EPD);
void setup() {
M5.begin(); //Init M5Paper.
M5.EPD.SetRotation(90); //Set the rotation of the display.
M5.EPD.Clear(true); //Clear the screen.
M5.RTC.begin(); //Init the RTC.

canvas.createCanvas(540, 960); //Create a canvas.
canvas.setTextSize(3); //Set the text size.
canvas.drawString("Hello World", 10, 10); //Draw a string.
canvas.pushCanvas(0,0,UPDATE_MODE_DU4); //Update the screen.
delay(2000);
}

void loop() {
M5.EPD.Clear(true); //Clear the screen.
canvas.drawString("Another string", 10, 60); //Draw a string.
canvas.pushCanvas(0,0,UPDATE_MODE_DU4); //Update the screen.
delay(5000);
}

Expected : I see only 'Another string' after refresh every 5 seconds.
Actual : Both 'Hello World' and 'Another string' are displayed.
:(

I think I am missing something. May you please explain what is going wrong here?

Thanks,
Zitrone