[M100] RS-232 to bluetooth

[jonathan.y...@telia.com]

Hello,
I can connect my M100 to a Raspberry Pi, either through a USB-->RS232 adapter, 
or even on the GPIO bus with a suitable level shifter.  I've always done with 
the 'larger' ones but I've been playing a Zero W, which doesn't have the GPIO 
soldered on and only 2 micro USB connectors, one of which is for power.  I've 
thought of trying to connect the M100 via bluetooth, but I thought I would ask 
if anyone has done this.  I can get a console via bluetooth from other bt 
devices (like my android tablet) and the zero 2 has bluetooth on-board, so this 
kind of connection wouldn't need anything hanging off the Pi zero.
 I've seen RS-232 to bluetooth adapters, though the 'cheaper' ones don't really 
conform to the +12 -12 of real RS232. I've toyed with trying an hc-05 and a 
level shifter but maybe it's better to get somethiing that does it all, if this 
is even reasonable.
Jonathan