I need plot in real time from bluetooth, can I help me??

I create the next code to communicate and plot a signal from bluetooth but i have a error...can I help me??

[Geoff Hayes]

Mauricio - please copy and paste the full error message so that we can understand what the problem is. While it is great that you have posted your code, not all of us will be able to run it if we don't have the appropriate bluetooth device or supporting packages.