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Pronterface and Bluetooth HC-05

Posted by Chips 
Pronterface and Bluetooth HC-05
December 23, 2020 06:48AM
Hi all,
I have a home made Mega2560/Ramps & Marlin based printer - all working good.
I run with a long USB cable from PC to printer - works great.
But, i thought why not implement Bluetooth and do away with the long cable.
So, i got a HC-05 module AT'd and it wotks and pairs, but it takes a very long time (1 min) to actually connect to the outgoing Bluetoth serial port.
Once connected, it does work, although it does seem quite slow (based on single keystrokes with a message being sent back from an Arduino test sketch).
Arduino and TeraTermPro will wait for the Bluetooth serial to connect, but Pronterface will not and gives a time out :

"[ERROR] Could not connect to COM9 at baudrate 115200:
Serial error: could not open port 'COM9': WindowsError(121, 'The semaphore timeout period has expired.')"

So is my Bluetooth connection unusually slow, or is Bluetooth just rubbish ?
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