M7100 Sensor SV Seeker

// analog input which is conneted to the sensor "output" pin
int sensorInput = A0;

// 150 psi = 10 bar, you can change it according to you sensor/ prefered unit
float maxPressure = 150;

void setup() {
  // put your setup code here, to run once:
  // depending on the sensor, INPUT_PULLUP instead of INPUT might be useful
  pinMode(sensorInput, INPUT);

}

void loop() {
  float sensor_value = analogRead(sensorInput);
  // TODO: implement a routine to calibrate

  // max pressure = 4.5V. Arduino has 8 bit accuracy -> 1024 different voltages it can detect (0-1023).
  // if we assume a 5V reference, max value would be at (1023 / 5) * 4.5 ~ 920 so 920 equals max pressure
  // min pressure = 0.5V. (1023 / 5) * 0.5 ~ 102
  // eff range is 920 - 102 = 818


  float pressure = ((sensor_value - 102.0) / 818.0) * maxPressure;

  // incorrect reading
  if (pressure < 0) {
    pressure = 0;
  }

}