My supplier tells me that communication between 2 bluetooth devices requires authentication by an app. When reading online I believe it should be possible, but am not 100% sure.
One article from EDN gave me the impression that it should be possible, but I cannot oversee completely.
My application is a smart battery charger, which will allow the owner of an electric bicycle to charge the battery not full but e.g. 80% to save lifetime (like Tesla c.s. does - this roughly doubles the lifetime). A tester with Bluetooth at the e-bike dealer then (optionally) measures the exact capacity of the battery and marks the voltages at each 10% State of Charge.
I intend to do this BT communication without an app as that would be too complex. Here is the procedure:
The charger sends a data set (including device ID) and the tester receives. After measuring is completed the tester sends the updated dataset back to the charger. After verifying if the device ID is the charger's, the charger then updates the data set and is hence calibrated. Is this approach (working without App) feasible in your view?
It would help me best when I can copy an answer and pass this along to my supplier. They are a Chinese company and I prefer to work with them - even when they do not (yet) have hands-on experience. They are very experienced in EE.