ganglion: better detect if disconnects, timeout 1s

Author: jfrey-xx

open_bci_ganglion.py

@@ -60,7 +60,7 @@ class OpenBCIBoard(object):
   """
 
   def __init__(self, port=None, baud=0, filter_data=False,
-    scaled_output=True, daisy=False, log=True, timeout=-1, max_packets_to_skip=20):
+    scaled_output=True, daisy=False, log=True, timeout=1, max_packets_to_skip=20):
     # unused, for compatibility with Cyton v3 API
     self.daisy = False
 
@@ -222,8 +222,12 @@ def start_streaming(self, callback, lapse=-1):
       callback = [callback]
 
     while self.streaming:
-      # at most we will get one sample per packet
-      self.gang.waitForNotifications(1./self.getSampleRate())
+      # should the board get disconnected and we could not wait for notification anymore, a reco should be attempted through timeout mechanism
+      try:
+        # at most we will get one sample per packet
+        self.gang.waitForNotifications(1./self.getSampleRate())
+      except Exception as e:
+        print("Something went wrong while waiting for a new sample: " + str(e))
       # retrieve current samples on the stack
       samples = self.delegate.getSamples()
       self.packets_dropped = self.delegate.getMaxPacketsDropped()