1 files changed, 6 insertions, 1 deletions
diff --git a/mdb/backend.py b/mdb/backend.py
index 8e40da5..1fc686e 100644
--- a/mdb/backend.py
+++ b/mdb/backend.py
@@ -84,10 +84,15 @@ class RaspiBackend(Backend):
 #
 class SerialBackend(Backend):
     def __init__(self, device='/dev/ttyACM0'):
+        import serial
         self.ser = serial.Serial(device)
 
     def read(self):
-        return self.ser.read()
+        buf = b''
+        while len(buf) < 2:
+            buf += self.ser.read(1)
+        return buf
 
     def write(self, data):
         self.ser.write(data)
+        self.ser.flush()