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Re: RS232 Radio link
The programming port does not require CTS/RTS lines. We built ourselves a long cable last year which contained ony TX, RX, and ground which worked fine.
Additionally, I purchased one of the BlueSMIRF modems from SparkFun last summer - they do not work to download code. As mentioned here already, I suspect this has to do with timing which is the same problem as seen with some USB converters. In an effort to correct this I wrote my own version of the IFI loader which I was in the process of tuning to address the timing dependencies, but that project got put on the back-burner as our team activities started up in the fall...
However, the BlueSMIRF does work nicely for debug output from the RC. You do have to reconfigure some of it's settings to allow it to keep up with the 115200 stream coming out of the programming port though.
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