[Discuss-gnuradio] Cannot get Socket-to-blob and blob-to-Socket to work with float values

[Tommy Tracy]

Hello everyone,

    I'm doing some work with Josh Blum's extras. Basically, I made the
easiest possible message-passing program I could think of.

Signal Source [sample:44.1k, freq:1k]  ----(float)----> Extras: Blob
to Socket[UDP, 127.0.0.1, 12345]

Extras: Socket to Blob[UDP, 127.0.0.1, 12345] -----(float)------>Audio
Sink[sample:44.1k]

When I attempt to run this, I get the following error message:

  File "/home/ttracy/Documents/GNURADIO/examples/companion/top_block.py",
line 41, in __init__
    self.connect((self.gr_sig_source_x_0, 0), (self.extras_blob_to_socket_0, 0))
  File "/usr/local/lib/python2.7/dist-packages/gnuradio/gr/top_block.py",
line 124, in connect
    self._connect(points[i-1], points[i])
  File "/usr/local/lib/python2.7/dist-packages/gnuradio/gr/top_block.py",
line 130, in _connect
    dst_block.to_basic_block(), dst_port)
  File 
"/usr/local/lib/python2.7/dist-packages/gnuradio/gr/gnuradio_core_runtime.py",
line 1836, in primitive_connect
Traceback (most recent call last):
  File "/home/ttracy/Documents/GNURADIO/examples/companion/top_block.py",
line 54, in <module>
    return _gnuradio_core_runtime.gr_top_block_sptr_primitive_connect(self,
*args)
ValueError: itemsize mismatch: sig_source_f(1):0 using 4, blob_to_udp
wrapper(6):0 using 1

Unfortunately, I have no idea what this stack trace is telling me. Can
it not handle Floats as an input?

Thanks for the help!
-- 
   Sincerely,
Tom Tracy II
  UVA PhD