Single Channel Gateway

From the code, it is impossible, that the packet forwarder shows the "unrecognized transceiver" message, when the register value is correctly read as 0x12 from the rf module. Checking the register means, verifying, that 0x12 is indeed read back from the connected hardware.
You will find the line
//printf("Version: 0x%x\n",version);
in main.cpp, line 268, just below the printf, where the "unrecognized transceiver" message is put out.
Just remove the two "//" in front of this line, recompile and run the forwarder again.
If it prints "Version: 0x00", this usually means, that the register cannot be read at all due to problems in wiring or pin configuration. If this is the case, we can further check your pin/wiring configuration.