purchase arrived, corresponds to the description. Unfortunately, a fairly simple item, a 9V battery connector to power the board for some adjustments, arrived without the battery connector being electronically connected to the cable connector (neither the negative nor the positive side is connected to the connector). I made a mistake and reported an issue using the email address provided in the documentation instead of the feedback on the feedback. They responded to feedback promptly and an issue I had was resolved. It is very good value for money and packs a lot of information and educational value. I've been programming for a long time and this is the first time I've actually programmed to control devices in this way. Very interesting and gives lots of food for thought for future projects.
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