diff --git a/MAPID-CP/MAPID-CP.ino b/MAPID-CP/MAPID-CP.ino
index 386612d..b4bfe6f 100644
--- a/MAPID-CP/MAPID-CP.ino
+++ b/MAPID-CP/MAPID-CP.ino
@@ -43,7 +43,7 @@ void setup() {
 	// Show README
 	SCmd.addCommand("README", showReadMe);
 	
-	SCmd.addDefaultHandler(commandNotFound);
+	SCmd.setDefaultHandler(commandNotFound);
 	
 	
 	Serial.println("Ready.");
@@ -72,7 +72,7 @@ void loop() {
 	SCmd.readSerial();
 }
 
-void commandNotFound() {
+void commandNotFound(char *cmd) {
 	Serial.println("");
 	//Serial.println("[ERROR @ TTY:IN]  COMMAND NOT FOUND!");
 	Serial.println("[ERROR]  COMMAND NOT FOUND!");
@@ -137,7 +137,7 @@ void showVersion() {
 	Serial.print(OS_NAME);
 	Serial.print(" v");
 	Serial.println(OS_VERSION);
-	Serial.print("Hardware: ");
+	Serial.print("Hardware: Arduino ");
 	Serial.println(BOARD);
 	
 	Serial.print(TTY_PROMPT);
diff --git a/MAPID-CP/config.h b/MAPID-CP/config.h
index 8fb635d..a945171 100644
--- a/MAPID-CP/config.h
+++ b/MAPID-CP/config.h
@@ -2,7 +2,7 @@
 #define _CONFIG_H_
 
 #define OS_NAME     "MAPID/CP"
-#define OS_VERSION  3
+#define OS_VERSION  4
 
 #define PIN_LED     LED_BUILTIN
 #define PIN_LCD     2
diff --git a/README.md b/README.md
index b9bc0ca..f681587 100644
--- a/README.md
+++ b/README.md
@@ -5,3 +5,13 @@ Info display powered by two parts:
 1. Command line OS running on Arduino (MAPID/CP)
 2. Python pyserial script controlling the display over a serial connection
 
+## Requirements
+
+- Arduino libraries
+   - SerialCommand Advanced
+   - serLCD
+- Python libraries
+   - pyserial
+   - python-dotenv
+
+