if you have Ioniq28 then EVNotify should work ok, but it doesn't work yet for ioniq38- at least I can't get it to work. Seems there is an update due with that option.
The dongles seem to be very hit and miss, as I had a few that didnt work. I recently bought the VGate bluetooth dongle that appears to connect ok to an old android phone (doesn't connect to iOS phone) cost is £16.81 from amazon. On the photo it has a green banding around the unit. That one also has a sleep function, unlike most of the other cheap ones. Couldn't find anywhere in uk selling the green dongle that is recommended by TeslaBjorn.
Also recommend you look at the BM2 battery monitor (about £15 if you can wait for the slow boat). It also links via bluetooth to the android phone. Has identified some interesting results with the 12v battery when the car is not plugged in - I resorted to using a 12v battery maintainer (noco genius5) as that battery kept dropping below 12v.
