How can i read the full data in the characteristic of a connected BLE

Hi All,

I work on the ECG plot using app inventor and find some project in the forum to modify for my project. I meet some problem when doing the plot.
My ECG data is 256bytes(128 floats number). i use the block ''FloatsReceived'', it can only receive 5 float number once from the notification.

Is there any function or example i can take to read all these byte data in app inventor?

Connect2BLESignals_WithGraphs211.aia (224.0 KB)

Thanks a lot