I've got an ELM 327 as well.
1) Turn off your car
2) Plug it into your car
3) Turn on your car (OBD2's not powered if the car's not running
4) In your phone, go to the wifi settings and select the ELM/OBD/etc wifi-network that just popped out. Connect via that network.
5) I use a free iphone app called "AutoProLite." I boot it up and click connect. The app knows to connect via the wifi network to the obd2 dongle.
1) Turn off your car
2) Plug it into your car
3) Turn on your car (OBD2's not powered if the car's not running
4) In your phone, go to the wifi settings and select the ELM/OBD/etc wifi-network that just popped out. Connect via that network.
5) I use a free iphone app called "AutoProLite." I boot it up and click connect. The app knows to connect via the wifi network to the obd2 dongle.