LoPy 1: Module to Module example not working

[GregS]

Trying to get the simple Module to Module example ( https://docs.pycom.io/tutorials/networks/lora/module-module/ ) working - Node B isn't receiving any messages. Node A is executing the loop (as evidenced by the output of the print commands). The two nodes are in the same room, and both have the antennas connected.
Both running fw 1.20.2.r4

Is there anything that may need to be changed in the code, to allow it to work with the current firmware? If it matters, I have set the region to AU915 on both.

[GregS]

Just btw, I got the Module to Module example to work by changing the socket calls in the Node A code to blocking - looks like it's a timing issue.

[GregS]

And.......WOW!!!!!! It's working from my apartment, to an UNDERGROUND garage about 100m away, and down one level. I am absolutely STOKED!!! It's blasting through ALL MANNER of stuff.

[GregS]

FYI the Lora-MAC version here https://docs.pycom.io/tutorials/networks/lora/lora-mac/ actually is working (hooray! 😀 )