Android Question How to obtain Serial Number from USB device

[littlerunningdeer]

Am developing interface to MCP2210 USB HID device. The USB library wrapper (v0.98) appears to be missing a way to get the USB device Serial Number. Are there other methods by which to obtain the USB getSerialNumber from android.hardware.usb.UsbDevice? Am just getting started. The USBdetails program (v1.1) was a very useful starting point. Is there a way to modify the Library and recompile it?

 

[Erel]

You can get this value with JavaObject. However it is only available in Android 5+:

Dim jo As JavaObject = device
Log(jo.RunMethod("getSerialNumber", Null))

 

[littlerunningdeer]

Android 5?, That leaves a lot of devices on the floor. Any chance I can modify the Library?

 

[DonManfred]

Any chance I can modify the Library?

Put Android 5+ in the background.

public String getSerialNumber () Added in API level 21

Reference

getSerialNumber is added to Android in Api 21 (5)

 

[littlerunningdeer]

While the USBDetails program was very useful in getting started, a bug in it caused me to discount the value of the raw descriptors.
So now the applicable code to obtain the serial number is:

Dim ud As UsbDevice
ud = devices(device)
Dim connection As UsbDeviceConnection
connection = Connect(0, 0, interfaces)
Dim Obj1 As Reflector
Obj1.Target = connection
Obj1.Target = Obj1.GetField("connection")

Dim buffer(128) As Byte ' maximum packet size
Dim datalen, idx As Int
rawdescs = Obj1.RunMethod("getRawDescriptors")idx = rawdescs(16)
datalen = connection.ControlTransfer(128, 6, 0x0300 + idx, 0, buffer, buffer.Length, 100)
'buffer(0..datalen) contains string descriptor