nexus: Move to a line based protocol (similar to FTP) + fix bugs

Signed-off-by: San Mehat <san@google.com>
diff --git a/nexus/WifiController.cpp b/nexus/WifiController.cpp
index 806141c..cba00ec 100644
--- a/nexus/WifiController.cpp
+++ b/nexus/WifiController.cpp
@@ -93,11 +93,8 @@
     return -1;
 }
 
-void WifiController::sendStatusBroadcast(const char *msg) {
-    char tmp[255];
-
-    sprintf(tmp, "WIFI_STATUS:%s", msg);
-    NetworkManager::Instance()->getBroadcaster()->sendBroadcast(tmp);
+void WifiController::sendStatusBroadcast(char *msg) {
+    NetworkManager::Instance()->getBroadcaster()->sendBroadcast(600, msg, false);
 }
 
 int WifiController::disable() {