Hi Craig – what is the bonding sate of the meter?
To check: on your phone, go to settings, Bluetooth. Is there an entry called “Illuminati Meter”? If so, please “forget” it.
On the meter when power is off, hold down the power button for 10 seconds. This will erase the bonding state in the meter.
Now that both devices have had their bonding states erased, please try to connect again.
Also please check [this post] for more info.
If you have tried all these things, then we should talk on the phone. Please send me an email at support-at-illuminatiinstruments-dot-com.