How to enable USB API in Android Things for Raspberry Pi 3

Question

I am working on a project which involves a Raspberry Pi 3 Module B Board with Android Things OS on it. My android application running on Raspberry Pi3 needs to communicate with an external hardware over USB. But,it has been mentioned in the Known Issues - https://developer.android.com/things/preview/releases.html that the USB API is currently disabled.

Is there any way for enabling the USB APIs in Android Things? Any help or guidance for the same will be highly appreciated! Thanks in advance!

Methodology

Answer 1

This API has been added to the Developer Preview 3, see the release notes

Insinuate

Answer 2

May be this post helps. Needs to be some tricks on ttyUSBx.

Paresthesia

Since AT DP3 USB/Serial connection directly supported via peripheral manager as UART interface. Useful information can be found at this post. So no need to use USB API. However USB API also was enabled with AT DP3. – Paresthesia

Answer 3

Currently the Peripheral HAL doesn't recognize USB serial based UART peripherals. However, if your USB serial device (ie Raspberry PI) exposes individual UART TX & RX pins, you can communicate with it using the UART Peripheral API.

Note:

• TX and RX must be crossed while connecting the peripheral to the UART board of your development board .

• On Raspberry Pi 3, the console needs to be disabled : UART peripherals on Android Things for Raspberry Pi 3

Estrada

Thank you @Estrada for your prompt reply. I just checked the I/O Pinout diagram of Raspberry Pi 3. It has just one UART. But my devices needs minimum 2 UARTS. Any way out for this? – Methodology