Hola amigos de steemit hoy les traigo un video que comparto desde youtube por TWiT Netcast Network muy interesante para aquellas personas que adoran buscar la forma de automatizar su hogar o empresa.
DTMF quiere decir( Dual - Tone Multi - Frequency)
si les ha gustado el vídeo no olviden apoyar con un voto :D
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