What I figured out is that if a bluetooth adapter is only on the Surgivet end and you utilize the built in bluetooth on the host PC or a bluetooth USB dongle, you can assign the comport but Windows will not keep it open as it thinks nothing is coming through.
If you place one of the wireless bluetooth adapters on both ends (SurgiVet and Host PC) the adapters auto link and Windows will keep the COM port open.
I imagine you might be able to utilize one of the WiFi adapters from this same company only on the Surgivet end and save a bit of money but our Wifi is so taxed in both locations that I needed a more reliable solution.
Since none of our windows PCs have COM ports I utilized a USB to Sub-D converter from the same company I purchased the bluetooth adapters from because they guaranteed compatibility. I have also been able to make a Tripp-Lite and one other off-brand of USB to serial adapter work though, so again there may be some cost savings if a client wanted to try another brand.
As far as the bluetooth adapters go I am using (see links below) - 300ft range (supposedly), I am finding I get a bit of signal dropout at about 70ft or so (this would include a wall passthrough also). The adapter reconnects automatically and fairly quickly though.
SurgiVet outputs +5VDC on pin 6 of the Sub-D connecter. These bluetooth adapters will run from +5VDC on pin 9. In CSV output the Surgivet only utilizes Pins 2, 3 & 5 (tx, rx, ground).Since I didn’t want to have another power cable to deal with and out Surgivet are not in fixed positions I purchased a male and a female Sub-D to RJ45 converter for each that is unassembled. This allowed me to cross over pin 6 from the Surgivet to pin 9 on the bluetooth adapter enabling the adapter to be powered over the serial connection. I use commercially available 6 inch (think that’s about 7-8cm) Cat 5e patch cable to run between the two adapters. I did receive a quote for custom made 1ft serial cables that cross pin 6 to 9 for about $15 USD a piece if I purchased 10 (we have ten Surgivet between the two locations). With the adapters I was able to make a clean looking cable myself for just under $2 USD.
There is a bit of a trick to telnetting into these adapters and getting the settings right so the same two adapters always connect to each other - I have those settings and will send you a complete write up with pictures and terminal settings as soon as I have the time. Sorry it took so long for me to get back with you on this. I will do my best to get you pics of pinouts this week.
Links to all parts needed are below. The company selling the adapters has excellent and timely tech support, just an FYI. We will be experimenting with these in North Charleston for the next week or so in the ER and then I will be duplicating for our other divisions at both locations.
USB to serial converter http://www.usconverters.com/usb-serial-adapter-xs880
RJ45 to serial male converter https://www.monoprice.com/product?p_id=1151
J45 to serial female converter https://www.monoprice.com/product?p_id=1153
6” CAT 5e patch cable https://www.monoprice.com/product?p_id=4974
I have also been able to use these other types of serial to USB adapters.