diff --git a/Firmware/Example1-ReadButtons/Example1-ReadButtons.ino b/Firmware/Example1-ReadButtons/Example1-ReadButtons.ino
index 1d7547a..ece9b83 100644
--- a/Firmware/Example1-ReadButtons/Example1-ReadButtons.ino
+++ b/Firmware/Example1-ReadButtons/Example1-ReadButtons.ino
@@ -42,7 +42,7 @@ void setup()
   // Initialize the PCA9554, default address = 0x20
   if (io.begin() == false) //Device Address, Number of GPIO
   {
-    Serial.println("PCA9557 not detected. Please check wiring. Freezing...");
+    Serial.println("PCA9554 not detected. Please check wiring. Freezing...");
     while (1)
       ;
   }
diff --git a/docs/assets/component_documentation/PCA9557.pdf b/docs/assets/component_documentation/PCA9557.pdf
deleted file mode 100644
index bff7c80..0000000
Binary files a/docs/assets/component_documentation/PCA9557.pdf and /dev/null differ