at_send_command: call at_next_command on failure

src/at.c

@@ -70,6 +70,7 @@ gboolean at_send_command(struct EG25Manager *manager)
 
         if (len < 0 || len >= sizeof(command)) {
             g_warning("AT command does not fit into buffer\n");
+            at_next_command(manager);
             return FALSE;
         }