diff --git a/darkwater/DW640.cpp b/darkwater/DW640.cpp
index a6cf62e..9585ea8 100644
--- a/darkwater/DW640.cpp
+++ b/darkwater/DW640.cpp
@@ -42,7 +42,7 @@ DW640::DW640(uint8_t address) {
  * Then it enables auto-increment of register address to allow for faster writes.
  * And finally the restart is performed to enable clocking.
  */
-void DW640::initialize() {
+bool DW640::initialize() {
     this->pwm = new PCA9685( this->devAddr );
     if (!testConnection() ) {
     	printf("No 640 board found\n");
diff --git a/darkwater/DW640.h b/darkwater/DW640.h
index 02f30ba..633c34e 100644
--- a/darkwater/DW640.h
+++ b/darkwater/DW640.h
@@ -60,7 +60,7 @@ class DW640 {
     public:
         DW640(uint8_t address = DW640_DEFAULT_ADDRESS);
 
-        void initialize();
+        bool initialize();
         bool testConnection();
 
         // float getFrequency();