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December 3, 2015 at 3:47 pm #11888
I will give you some guidance. You can connect the FSR in series with a resistor (10K) across the supply (VCC and GND). You can connect the center point to the ADC input.
Now you can easily read the ADC values which will change depending upon the applied force. You can only get the variation of force by this. For calibration you need to do a lot of practical tests. There is no short cut.