Gyroscope IXZ500

Other Hardware Sensors
1

Hello everyone.
// Using gyro IXZ500 and Arduino UNO //
Here is my problem with this sensor. While I read a values from serial monitor, gyroscope automatically increases angle values, like its starts from zero and goes till 360 deg (as keep angle between -360 and 360) and repeat growing again. Otherwise, sensor read the values while i moving it. For example, it is growing and the value is 200, after i move it it changes to 30 deg, and then again growing from this value.

I dunno what to do for know cause i tried 2 different codes and its still growing. cannot make a screenshot for now, but will upload it tomorrow.
The connection - 5v VCC; x-out - analog pin 0, gnd - gnd.

The code:

float gyroVoltage = 5;
float gyroZeroVoltage = 1.35;
float gyroSensitivity = 0.002;

float rotationThreshold = 1;

float readError = (gyroVoltage/1023)*2;
float currentAngle = 0;

unsigned long time;

void setup() {
  Serial.begin(9600);
  time = micros();
}

unsigned long time2;
long loopNumber = 0;

void loop() {
  time2 = micros();
  loopNumber++;
  int gyroValue = analogRead(0);
  
  float gyroActualVoltage = (gyroValue * gyroVoltage) / 1023;
  
  float gyroActualZero = gyroActualVoltage - gyroZeroVoltage;
  
  if (gyroActualZero <= readError && gyroActualZero >= -readError) {
    gyroActualZero = 0;
  }
  
  float gyroRate = gyroActualZero / gyroSensitivity;
  
  float gyroRateTime = 0;
  
  if (gyroRate >= rotationThreshold || gyroRate <= -rotationThreshold) {
    gyroRateTime = gyroRate/( 1000000.0/(time2-time) );
    currentAngle += gyroRateTime;
  }
  
  if (currentAngle < 0)
  currentAngle += 360;
  else if (currentAngle > 359)
  currentAngle -= 360;
  
  if (time2-time > 1000000L) {
    Serial.println(currentAngle, 10);
    
    loopNumber = 0;
    time = micros();
  }
  
  delay (100);
}
2

That is what is called 'drift'. The rate gyroscope will have a Zero Rate Output and a sensitivity that both vary with temperature. Try adjusting your "gyroZeroVoltage" to get less drift.

3

this is what i'm talking about :

Also, if i change zeroVoltage, result will be mostly the same, the only difference is between values it provides (like not difference in 10, but in 100).
Any ideas what can produce this problem ? is it in a code part?

update:
Checked with Pico Scope, the zero voltage is mostly 1.3 -1.4V
Also use simple "hello world" for gyro like

void setup (){
Serial.out(9600);
}
void loop(){
int gyro = analogRead(0);
Serial.println(gyro, DEC);
}

to check if it is hardware issue. the values i got is 260, and gyro response for that.
the problem definitely with a code.

Could someone help with finding angle?

4

If you are reading 260 when the gyroscope is stationary then the ZRO voltage is 1.270772, not 1.35. Try that value to see if you get less drift.