Working perfect with touchdesigner.
If someone want to use my touchdesigner serial template. for make real time 3d visualizations for you m5stack device, tell me here.
This it's an input from Fire.
I'm working now on output data (LFO'S, ramps, etc..) from touchdesigner to M5Stack.

Powerful data and sensor visualization with agood gpu based graphics program.

So I can use GPIO3, GPIO1 or GPIO9, GPIO10 for usb serial data??

Thanks, I understand.
I wrote somewhere that the pins are 2 and 3 ?

Any requirements for this pins??

It seems that the Fire doesn't transmit serial data thru usb?? ony thru softserial?
Are both (1, 2) uarts wire serials?, if yes, I would need to buy a uart to usb adapter??

this are my blocks: