Passing rx from NRF.nfcRx to C code

Hi - the code looks good, but can you try E.getAddressOf(rx, true); - to require a flat string?

My guess is it'll then error with RX not a flat string, in which case you need to add rx = E.toString(rx) at the start to make it 'flat'.

I believe it's because rx that is passed to the function may not be flat (by default fragmented strings, which are faster to allocate, are used). For stuff like this, trace(rx) might help to give you some clues to the actual variable type.