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Currently I need to be able to read a serial port of a vending machine, I have read about USB host, and I have also found some libraries.

My question is: Is it really necessary to use an external library to be able to perform the serial port reading? Images of the converter

Juanes30
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  • Is it a USB port or actual serial? Because if its a real serial port, your first problem will be even connecting to it – Gabe Sechan Jun 24 '17 at 03:44
  • The port I have to connect to is a Dex, but would perform a USB converter. [Images of the converter](https://drive.google.com/drive/folders/0B-MP3uZWHvJnUkRUemFhZXNKaW8?usp=sharing) – Juanes30 Jun 24 '17 at 03:54

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