how to interface a cellphone with a micro controller | Microcontroller › 8051 › how to interface a cellphone with a micro controller This topic has 15 replies, 7 voices, and was last updated 12 years, 11 months ago by romel emperado. Viewing 16 post (of 16 total) ← 1 2 Author Posts May 6, 2011 at 5:26 am #6087 romel emperadoParticipant lool for PL232 circuit it willconvert usb to rs232 protocol.. Author Posts Viewing 16 post (of 16 total) ← 1 2 You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In