The explanation of how to use the UART Raw Access sample is very poor - in particular that it makes no mention whatsoever of the fact that AT+WMFM has to be used to “disable” a UART before it can be “opened” by the sample!
But isn’t there a trace received when we try to open an already open UART through WDU command which states that this cannot be done…?? i Thought it did…
All the trace says is that it failed - it does not give any reason for the failure.
This is partly becuase the error reporting from the Device Service itself is pretty pathetic - there’s pretty much just one error code that covers all failures for all reasons!
oops…!! that means the developer has to waste a lot of time before he actually realizes that the problem is coz the uart was already opened which is certainly not acceptable…