--- a/main/config.c	Tue Oct 08 16:51:30 2019 +0200
+++ b/main/config.c	Tue Oct 08 21:09:36 2019 +0200
@@ -7,7 +7,9 @@
 
 static const char *TAG = "config";
 
-extern unit_t		units[3];
+unit_t				units[3];                       ///< Pressure test units
+SemaphoreHandle_t		xSemaphoreUnits = NULL;		///< Semaphore Units records
+
 
 
 void write_config() {