Food for thought!:
Regular contributors to this Forum such as @Best_codes and @CommandeR have no connection to Makeblock. They try to respond to questions when they can, because they want to help by using their own experiences and expertise gained from earlier contributors and by drawing on their own Makeblock programming / assembly experiences.
N.B. It would be polite to treat them with the respect they deserve for any such help given herein - some do, but several do not reply with any form of thanks or further constructive dialogue.
It helps us too if new contributors start by using the Forum’s Search panel to look for (and read) Topics that have been addressed earlier in the last year-or-so before firing off a simple question that may have already been answered.