@György-Farkas Thanks you!

Thanks for the answers

The problem was with the charger and that it had a temperature sensor connected to pin 1. With a 1.5 A charger it does not work, I do not know why.

I was testing only with the matrix and said charger and today in my university when reading the post I thought about trying it without the sensor and connecting it to the computer and it worked, but when I put it in the other charger it would not.

Conclusion, I am using pin 11 for the temperature sensor and I have changed the charger.

PS: Can the web documentation be downloaded? There is a lot of data that I have not read and I'm liking, but I think I jump things without wanting to.

Hi, i have a onion omega 2+ with a matrix max7219

If i connect the #matrix and i turn on the omega doesn't start, no blink, nothing.

It's all connected in the expansion dock and im using the pins: 6,7 and 8.

Thanks guys!

Pd: sorry my english is poor... haha