diff --git a/gex/Client.py b/gex/Client.py
index 85d12fe..cedaafd 100644
--- a/gex/Client.py
+++ b/gex/Client.py
@@ -48,7 +48,8 @@ class Client:
                 pld_as_s = msg.data.decode('utf-8')
             except UnicodeDecodeError:
                 pld_as_s = str(msg.data)
-            raise Exception("UNHANDLED MESSAGE! %s" % pld_as_s)
+            # raise Exception("UNHANDLED MESSAGE! %s, type %d, id %04x" % (' '.join([("%02x"%b) for b in msg.data]), msg.type, msg.id))
+            print("UNHANDLED MESSAGE! %s, type %d, id %04x" % (' '.join([("%02x" % b) for b in msg.data]), msg.type, msg.id))
 
         self.tf.add_fallback_listener(fallback_lst)
 
diff --git a/gex/TinyFrame.py b/gex/TinyFrame.py
index f7c31e7..9939424 100644
--- a/gex/TinyFrame.py
+++ b/gex/TinyFrame.py
@@ -142,6 +142,8 @@ class TinyFrame:
         if listener is not None:
             self.add_id_listener(id, listener)
 
+        print("Tx: " + ' '.join(["%02x"%b for b in buf]))
+        print("    " + ''.join(["%c"% (b if b>=32 and b<127 else ord('.')) for b in buf]))
         self.write(buf)
         return id
 
@@ -187,6 +189,9 @@ class TinyFrame:
         """
         Parse bytes received on the serial port
         """
+        print("Rx: " + ' '.join(["%02x"%b for b in bytes]))
+        print("    " + ''.join(["%c"% (b if b>=32 and b<127 else ord('.')) for b in bytes]))
+
         for b in bytes:
             self.accept_byte(b)
 
@@ -233,6 +238,7 @@ class TinyFrame:
 
             if len(self.rbuf) == self.rlen:
                 self.rf.len = self._unpack(self.rbuf)
+                print("Len=%d"%self.rf.len)
 
                 self.ps = 'TYPE'
                 self.rlen = self.TYPE_BYTES
diff --git a/gex/transport.py b/gex/transport.py
index d40d893..c4c09a6 100644
--- a/gex/transport.py
+++ b/gex/transport.py
@@ -150,6 +150,7 @@ class TrxRawUSB (BaseGexTransport):
 
         detach_kernel_driver(dev, 2)  # CDC data
         detach_kernel_driver(dev, 3)  # CDC control
+        detach_kernel_driver(dev, 4)  # CDC data2
 
         # Set default configuration
         # (this will fail if we don't have the right permissions)
@@ -188,7 +189,7 @@ class TrxRawUSB (BaseGexTransport):
 
     def write(self, buffer):
         """ Send a buffer of bytes """
-        self._dev.write(0x02, buffer, 100)
+        self._dev.write(0x04, buffer, 100)
 
     def poll(self, timeout, testfunc=None):
         # Using time.sleep() would block for too long. Instead we release the semaphore on each Rx chunk of data
diff --git a/test_adc.py b/test_adc.py
index f5dcf6d..c09d050 100644
--- a/test_adc.py
+++ b/test_adc.py
@@ -11,10 +11,10 @@ with gex.Client(gex.TrxRawUSB()) as client:
     adc = gex.ADC(client, 'a')
 
     adc.set_active_channels([3])
-    rate=44000
+    rate=20000
     fs = adc.set_sample_rate(rate)
 
-    count = 44000*2
+    count = 1000
     data = np.add(adc.capture(count) / 4096, -0.5)
 
     if data is not None:
diff --git a/test_core.py b/test_core.py
new file mode 100644
index 0000000..7b0520a
--- /dev/null
+++ b/test_core.py
@@ -0,0 +1,9 @@
+#!/bin/env python3
+import time
+
+import gex
+
+with gex.Client(gex.TrxRawUSB()) as client:
+    time.sleep(3)
+    print("End")
+