Hi need to make one app for smartphone and tablet which make this functions:
- through bluetooth take data and send command with automatic research and connection to BT terminal
- 2/3 user interface pages (i can send examples)
- harvesting the BT data and, when the phone network is lost, write the data on the local files
- when the phone network is present send all data ( real time and locally recorded ) to cloud database (google)
- from the cloud database load the app parameters
Now, the app prototype, is written with AppInventor2 and work fine. I can send it for explain the functions needed.