Choose this model of the BlueFly if you want to connect to Android or iOS devices. Android devices connect using Bluetooth SPP. iOS devices connect using BLE. You can connect it to a Windows PC via USB to adjust settings.
This blog post provides more information on assembly of the BlueFlyVario_Bluetooth_USB_v12.3: https://blueflyvario.blogspot.com/2021/04/blueflyvariobluetoothusbv123-released.html
See this original blog post for technical design for the v12: https://blueflyvario.blogspot.com.au/2017/01/blueflyvariobluetoothusbv12-released.html
The package includes:
- BlueFlyVario_Bluetooth_USB_v12.3 main board programmed with the latest firmware, and with a small piece of neoprene protecting the sensor.
- 750 mAh Lithium Polymer battery.
- The translucent blue BlueFly case with four screws and the machined acrylic button.