diff --git a/Assertion.py b/Assertion.py
new file mode 100644
index 00000000..bfd661d8
--- /dev/null
+++ b/Assertion.py
@@ -0,0 +1,11 @@
+from serial import Serial, SerialException
+
+with Serial('/your/port', 9600) as ser:
+    ser.write(bytes([0x1]))
+    assert ser.read() == bytes([0xaa])
+
+    ser.write(bytes([0x0]))
+    assert ser.read() == bytes([0xaa])
+
+    ser.write(bytes([0x2]))
+    assert ser.read() == bytes([0xff])
\ No newline at end of file