Moto G 2015 - (1) This smart phone runs the app correctly when running Android 4.4.1 but not when running Android 5.1 or later. This smart phone does not have a "colon" character on the onscreen keyboard so the MAC address for the Bluetooth interface cannot be entered. This problem is difficult to identify because the "colon" appears on the keyboard but is grey rather than black because this economy smart phone uses an abbreviated 28 key keyboard rather than the full keyboard used on the Moto X. Users have made fixes by deleting Android 5.1 or 6.1 then reloading Android 4.4.1 in order to restore the colon. App developers have made new apps on GooglePlay Store entitled "Motorola Keyboard". The Android forums just state that users should contact Motorola about the problem.
22 April 2016 correction 1: Verified Bitalino board MAC address as printed on the printed sheet supplied with the board ie not
" 98:d3:31:b3:bc:d5 " using a free app entitled " MAC Address Finder " from GooglePlay Store. This free app listed all alphabet characters in capital letters. When BITadroid was restarted and the MAC address was entered with all capital letters then the app started and recording was done as advertised. ### If you get an "Invalid MAC address" notification when starting the BITadroid app for recording then try all capital letters.
The BITadroid app had also failed and displayed "Invalid MAC address" when tried on a Samsung Tab S2 but worked correctly today when all capital letters were used to enter the MAC address of the Bitalino board.
22April 2026 correction 2: Further internet research plus trial and error on the Moto G 2015 keyboard verified that Motorola and Android 5.1 and 6.0 updates have fixed the missing colon problem on the keyboard as follows: The colon is still grey but press snd hold for at least a second then release and a colon correctly appears.