diff --git a/python/EDS.py b/python/EDS.py
index 3ae662b..64e48f7 100644
--- a/python/EDS.py
+++ b/python/EDS.py
@@ -46,12 +46,10 @@ class LED:
         """
         if t == 0:
             self.i2.start(self.a, 0)
-            self.i2.write(bytes((0, r, g, b)))
-            self.i2.stop()
+            self.i2.regwr(self.a, 0, r, g, b)
         else:
             self.i2.start(self.a, 0)
-            self.i2.write(bytes((1, r, g, b, t)))
-            self.i2.stop()
+            self.i2.regwr(self.a, 1, r, g, b, t)
         
     def hex(self, hhh, t = 0):
         """
diff --git a/python/i2cdriver.py b/python/i2cdriver.py
index e828ca7..04b46d5 100644
--- a/python/i2cdriver.py
+++ b/python/i2cdriver.py
@@ -76,12 +76,12 @@ class I2CDriver:
 
     if PYTHON2:
         def __ser_w(self, s):
-            if isinstance(s, list):
+            if isinstance(s, list) or isinstance(s, tuple):
                 s = "".join([chr(c) for c in s])
             self.ser.write(s)
     else:
         def __ser_w(self, s):
-            if isinstance(s, list):
+            if isinstance(s, list) or isinstance(s, tuple):
                 s = bytes(s)
             self.ser.write(s)