I would like to obtain the value heading out of a block. For example what the value at the output of a multiply block which combines two sine functions. Or accessing and working with the output of a square wave.
something along the lines of
def get_multply_output(self):
return self.blocks_multiply_xx_0.output_items[0]
is there a way i can access the output value each time it is updated?
Add the "Probe Signal" gr::blocks::probe_signal block to your flow graph. Its level() method returns the item it most recently received on its input.
There are also other blocks named probe_* to provide other measurements such as item throughput; their commonality is that you have to poll them (ask them for their current value) rather than them producing items or messages.