Hi Ben,
I have looked at them, I recreated the fecapi_tagged_decoders example and switched to file source and file sink to send Hello World. I got that working today.
I then tried to add OFDM TX --> OFDM RX (see attached grc flow diagram), but can't get a balance between encoder frame size and number of noutput items. I either get the error "gr::log :INFO: cc_encoder1 - tried to set frame to XXX; max possible is YYY" or "thread[thread-per-block[13]: <block ofdm_carrier_allocator_cvc (16)>]: Buffer too small for min_noutput_items. I've tried increasing the minimum buffer size for the OFDM TX block, but then I get the error "gr::log :INFO: header_payload_demux0 - Detected a packet larger than max frame size"
I'm going to try with a more simplistic modulation scheme like PSK or FSK when I get the chance.
Thanks,
Alex.