   }
   int user = getUserIdArg(userarg);
   
+  if (global_debug) {
+    Serial.print("DEBUG External handshake from user ");
+    Serial.println(user);
+  }
+
   // FIXME: Provide physical handshake feedback
   // FIXME: Start/reset timers etc to fade out handshake indicators
 }

  else if (!strcmp(gamearg, KNOCK_STR)) {
    global_state &= ~STATE_KNOCK;
    digitalWrite(LED2_PIN, 0);
  }
}


#include "SerialCommand.h"

// Set to 1 to start in debug mode
#define DEBUG_MODE 1

#define SOLENOID_PIN 4
#define PIEZO_PIN 1
