Flex sensors problem with arduino uno without breadboard

this is a schematic

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well, what is result on display with sketch from post#19 ?

oscillates between 564 and 565

did you attempting to bend ?

when I move only one of the sensors, it changes from 565, when I move the other, nothing happens on the display

how big is change?

broken connection to GND side

from 565 to 600-750

good. it is working.

what can i do to make it work?

the second one? check wiring

I removed the silicone around the cables and now it oscillates between 1014-1023

1009-1024

broken here?
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I think so

Gently scrape white tips of the broken wire to expose the copper under the white. Bridge the gap with copper wire or a blob of solder. Alternatively, the opposite end might have a solder point for the wire.

I changed the sensor, now it works but I can't calibrate it

why you want to calibrate? you note unbend value and bend value. then you switch controlled thing depend on measured value

If i note the bend and unbend value, on display is not the right value of sensor. How can I fix this ?