diff --git a/libgreat/host/pygreat/board.py b/libgreat/host/pygreat/board.py
index 1a74fb51..97481d2d 100644
--- a/libgreat/host/pygreat/board.py
+++ b/libgreat/host/pygreat/board.py
@@ -380,11 +380,6 @@ def dmesg(self, max_length=4096, clear=False, encoding='latin1'):
 
 def _to_hex_string(byte_array):
     """Convert a byte array to a hex string."""
-    # Python2 compatibility
-    try:
-        byte_array = future.builtins.bytes(byte_array)
-    except ValueError:
-        byte_array = list(byte_array)
 
     hex_generator = ('{:02x}'.format(x) for x in byte_array)
     return ''.join(hex_generator)
diff --git a/libgreat/host/pygreat/classes/core.py b/libgreat/host/pygreat/classes/core.py
index 9cec88f4..d39997da 100644
--- a/libgreat/host/pygreat/classes/core.py
+++ b/libgreat/host/pygreat/classes/core.py
@@ -33,7 +33,7 @@ class CoreAPI(CommsClass):
             name="read_version_string", out_parameter_names=["version"], doc="Fetches the board's version.")
 
     # RPC that reads the part ID
-    read_part_id = command_rpc(verb_number=0x2, out_format="<8s", name="read_part_id", out_parameter_names=["part_id"])
+    read_part_id = command_rpc(verb_number=0x2, out_format="<2I", name="read_part_id", out_parameter_names=["part_id"])
     read_part_id.__doc__ = \
         """Fetches the part ID used on the board.