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Hi Andy,
Which PIC are you targeting (wondering if it's got an USART or EUSART)?
My guess is that there's something weird going on with the baudrate.
If possible, replace the Bluetooth connection...

Which device and out of curiousity, what's up with the slightly odd baudrate?

Well nothing and intermittent isn't quite the same :-)
Are you SURE the serial data is actually getting to the...

Hi Andy,
Intermittent results you say :-)

It sits there waiting for a character for 5 seconds, if none is received it goes to mainloop where you spend "considerable" time before you eventually...

I see noting really wrong with what's actually posted but as is usually the case not all the code is posted. Here's an untested example of what I think you're looking for:


Main:
HSERIN 5000,...