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I have 5 flex sensor connected to a glove that I wear, when I bend a finger the amount of flexing is read by the flex sensor, but because Raspberry pi only has digital I/O, and my ADC didn't arrive yet, I had to interface the analog input with an arduino and read the serial output with Raspberry pi.
This code uses the input and sends it to the servos connected to plastic fingers, forming an animatronic arm.