Here is another robotic arm that combines with Raspberry Pi to teach you a thing or two about robots and coding. The Adeept RaspArm is a WiFi robot arm kit with a Python PC software. You can control it from your PC. Simply bring your Pi 4/3/2B/B+, and you are set.
More gadgets like this: here
The robot arm comes with a simple LCD screen and LEDs for status indication.
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