I´ll explain my question better..
For a project i need to send data in ASCII in the range 0 to 30 or maybe a little more.
I´ve tried the code i found in this page but it goes only from 0 to 15. I asked before about ASCII base 36 because i found that code too, but it does´n´t work, i only receive 00000.....
I need to vconvert the data to ASCII because i will send this data to another micro via RS-232, witch is working with a NIC.
I´ll be very thankfull if you could help me.

Here in Spanish, for those who asked before:
Para un proyecto en el estoy conectando un micro a otro que se encarga del manejo de una NIC necesito convertir un dato a ASCII. El progrma que encontre aqui solo va de 0 a 15, y yo necesito un rango mayor.
Por otra parte encontre otor programa que dice convertir de bin a ASCII base 36?? Lo probe pero al ver los datos que mando serialmente (RS-232) solo recibo ceros.
Gracias