The firmware is different on the basic version and the communication version. The only way to get the communication version of the firmware is to buy it like that. They don't allow user upgrades.
The alternative is to reflash the DPS5015 with OpenDPS. The UI, features and control utility completely change though and there may be some calibration needed.
Hm thanks for this information, that should save me, and a few other people from cutting down on the cost of the module and afterwards finding out that it actually sucks to operate without BT/USB module.
I did read the blogpost of the guy who reflashed his 5015 with OpenOCD. Last thing to notice then is, how accurate is it compared to the original calibrated firmware. I would rather not touch it unless you really hate it or want to modify it that bad.
Edit; I meant OpenOCD, not OpenDPS.