Hi all,

Dimitri merged the patch set to gr-osmosdr master yesterday.

Beware of a little catch, there are some examples floating on the net with "hackrf=1" as the device argument. Device index numbers are 0-based (like with rtlsdr and other drivers), so you'll have to use hackrf=0 if you only have a single device attached, hackrf=1 would be the second device. Before this patch the hackrf gr-osmosdr driver did not care about the parameter at all.

Device selection by serial number tail ("hackrf=beeff00d") requires updated hackrf firmware. The firmware changes have been in the hackrf git master, but there's no official firmware binary published yet.

On Mon, 1 Jun 2015, Heikki Hannikainen wrote:

Hi,

I have a little pull request for gr-osmosdr, to enable multiple devices support for hackrf. This allows doing things like full duplex using two boards in a single graph.

You can specify either hackrf=0 and hackrf=1 to select by a device index, or the serial number (or an unique suffix of a serial number), hackrf=f00d and hackrf=1234abba. hackrf_info lists multiple devices and their serial numbers. Apps like gqrx seem to magically work, too, and allow device selection.

The hackrf project just merged the pull request for libhackrf & tools 3 days ago, and it's already available in macports at least.

The gr-osmosdr patches here do work against old libhackrf as before, it detects the presence of the new hackrf_device_list API and enables multiple device support only if it is available.

What is the preferred patch format, I have the changes available as a feature branch in github?

https://github.com/hessu/gr-osmosdr/tree/feature/hackrf_multidev

- Hessu