Node / meshtastic / Meshtastic-Android / files / app / src / main / java / com / geeksville / mesh / repository / usb / README.md

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This module provides a repository for acessing USB devices.

In order to be picked up, devices need to be supported by two different mechanisms:

• Android needs to be supplied with a device filter so that it knows what devices to inform

the app about. These are expressed as vendor and device IDs in T383838src/res/xml/device_filter.xml.

• The USB driver library also needs to have a mapping between the vendor + device IDs and the

driver to use for communications. Many mappings are already natively supported by the driver

but unknown devices can have manual mappings added via T383838ProbeTableProvider.

The Serial USB Terminal

app in the Google Play Store seems to be a good app for determining both the vendor and

device IDs as well as testing different underlying drivers.

When granting permissions to a USB device, the Android platform remembers the user's decision.

In order to test the permission granting logic, re-install the app. This will cause Android

to forget previously granted permissions and will re-trigger the permission acquisition logic.