All my gratitude for Z80-refugee, I said this to him in private , but I want to make it public. He did a **Brilliant** post, about GPIO, that let me test the communication of the PI in Forth in no time and without any troubles ! This is remarkable in those days we are living, what "in our time " accostumed to be the norm , now is a miracle !
And also my sincere thanks to "scruss" that shared this article on the FB - FORTH PROGRAMMING LANGUAGE 21st CENTURY , and lighted my way. I will try to add in the near future some more experiments with the RPI and Forth videos for those who want to use or learn this fantastic programming language.