Nothing is displayed on the Led Matrix

[Grey-Lancaster]

Hey I know this is old but thought I would try. I have other code that works so I know it is wired correctly D6 and all. If I have something else running it stops while it uploads your code then just goes blank.
I get the webpage and serial monitor shows updates. Curious though as it prints something's twice and it seems to reboot every now and then.

Thanks,
Grey

Connected to shop2
IP address: 192.168.1.174
MDNS responder started
HTTP server started
IP Address: 192.168.1.174
0010FF
0010FF
6
My msg here
My msg here

[lights0123]

I believe I have experienced the same thing. I've generally just hit the reset button manually when this occurs, but that's obviously not a good solution.

It's possible that there's a memory leak (although I doubt it) or integer overflow.

[Grey-Lancaster]

You are alive :-) Thanks for the quick reply. I Just made it "work" by changing the "X" calculation but obviously it it does not work well with different length of msgs. When I use your code it does not display anything. Changing this starts with the ip and updates from the web page
I guess that is the integer overflow?

` matrix.fillScreen(0);
matrix.setCursor(x, 0);
matrix.setTextColor(matrix.Color(r, g, b));
matrix.print(message);
// if (x < ((int)message.length()) * -6) {
// Serial.print(x);
// Serial.print(' ');
// Serial.println(((int)message.length()) * -6);
// x = matrix.width();
if(--x < -140) {
x = matrix.width();

}
matrix.show();
delay(100);`

[Grey-Lancaster]

Okay I found it. need two dashes in front of x
also I think my reboots may have been because I was not using a real external 5v power supply. Just running it from the wall wart to the d1 mini
if (x < ((int)message.length()) * -6) {
change to
if (--x < ((int)message.length()) * -6) {

I love it thanks so much
Grey

[Grey-Lancaster]

I fully understand I am bugging you on an old project. Is there somewhere else I should be looking for doing an 8 X 32 led matrix? I have not found much.

So should there be a color picker in this blank space? I can send money of that helps :-)