Always start and end program with all relays OFF. This is consistent and...

Always start and end program with all relays OFF. This is consistent and leaves nothing to previous run where certain processes can leaver coupler in an inconsistent state.

coupler/opc-ua-server/server.c

@@ -138,7 +138,7 @@ static void afterWriteTime(UA_Server *server,
 
     if (data->value.type == &UA_TYPES[UA_TYPES_INT32]) {
         UA_Int32 hrValue = *(UA_Int32 *)data->value.data;
-        printf("int32Value %u\n", hrValue);
+        //printf("int32Value %u\n", hrValue);
 	if (hrValue > 0){
             setRelayState(0x0F);
 	}
@@ -222,7 +222,9 @@ static void stopHandler(int sign) {
 }
 
 int main(void) {
-    
+    // set all relays to OFF at startup
+    setRelayState(0x00);
+
     signal(SIGINT, stopHandler);
     signal(SIGTERM, stopHandler);
 
@@ -241,5 +243,9 @@ int main(void) {
     UA_StatusCode retval = UA_Server_run(server, &running);
 
     UA_Server_delete(server);
+
+    // set all relays to OFF at startup
+    setRelayState(0x00);
+
     return retval == UA_STATUSCODE_GOOD ? EXIT_SUCCESS : EXIT_FAILURE;
 }