diff --git a/aruco/ArucoDetector.cpp b/aruco/ArucoDetector.cpp
index d452b75..68bfcf2 100644
--- a/aruco/ArucoDetector.cpp
+++ b/aruco/ArucoDetector.cpp
@@ -270,6 +270,9 @@ void ArucoDetector::sendData(int serverSocket, const std::string& data) {
     }
     if(clientSocket != -1) {
         setNonBlocking(clientSocket);
+        if(fcntl(clientSocket, F_GETFL) & O_NONBLOCK) {
+            std::cout << "Socket is non-blocking" << std::endl;
+        }
         send(clientSocket, data.c_str(), data.size(), 0);
         close(clientSocket);
     }