I tried three progressively more expensive (Starting dirt cheap) ELM 327 bluetooth adaptors looking for one that would run EvBattMon on my PHEV,
All seemed to run basic Android software such as "TorquePro" but it was not until I purchased an "iCarsoft i620" that I could get EvBattMon to work.
It now runs "PHEV Watchdog" without any problems.
Getting hold of one at a reasonable price was something of a challenge. I obtained mine from an ebay seller in France. Their prices have increased since the
nm so today I would resort to Amazon.co.uk.
pointed out you will find a list of adaptors that work with EvBatMon and some that do not at http://evpositive.com/evbatmon-for-phev.html