diff --git a/ext/bscacquisition.py b/ext/bscacquisition.py
index c322eba..28efa25 100644
--- a/ext/bscacquisition.py
+++ b/ext/bscacquisition.py
@@ -1,6 +1,5 @@
-
 import h5py
-import numpy as np
+#import numpy as np
 
 from slic.core.acquisition.acquisition import Acquisition
 
@@ -9,32 +8,33 @@ from slic.core.acquisition.acquisition import Acquisition
 
 class BSCAcquisition(Acquisition):
 
+    def __init__(self, bscache, *args, **kwargs):
+        self.bscache = bscache
+        self.grp = 0
+        super().__init__(*args, **kwargs)
+
     def setGroup(self,idx):
         self.grp = idx
-        
+
     def _acquire(self, filename, channels=None, data_base_dir=None, scan_info=None, n_pulses=100, **kwargs):
+        self.bscache.flush()
+        data = []
+        for i in range(n_pulses):
+            #print('Requested %i' % i)
+            data.append(next(self.bscache))
+            #print('Received %i' % i)
 
-        if not hasattr(self,'grp'):
-            self.grp = 0
-            
-        queue =channels[0]  # abusing interface since BSAcquisition assume a list of channels
-        # clear the queue
-        queue.flush()
-        # gather data
-        data = [queue.__next__() for i in range(n_pulses)]
         # write out the data file
-        hid = h5py.File(filename,'a')
-        # save the pulse ID
-        singledata = [ele['pid'] for ele in data]
-        pidname = 'pulse_id/group%d' % self.grp
-        hid.create_dataset(pidname, data = singledata)
-        for chn in queue.channels:
-            singledata = [ele[chn] for ele in data]
-            if not chn == 'pid':
-                dname = chn.replace(':','/')+'/data'
-                hid.create_dataset(dname, data = singledata)
-                dpid = dname.replace('/data','/pid')
-                hid[dpid] = hid[pidname]
-        hid.close()        
-        
+        with h5py.File(filename,'a') as hid:
+            # save the pulse ID
+            singledata = [ele['pid'] for ele in data]
+            pidname = 'pulse_id/group%d' % self.grp
+            hid.create_dataset(pidname, data=singledata)
+            for chn in channels:
+                singledata = [ele[chn] for ele in data]
+                if not chn == 'pid':
+                    dname = chn.replace(':','/')+'/data'
+                    hid.create_dataset(dname, data=singledata)
+                    dpid = dname.replace('/data','/pid')
+                    hid[dpid] = hid[pidname]