MPU-9250 + servo

Using Arduino Sensors
1

Hello !
I use an mpu9250 and a servo.
I want to limit the servo travel, but I have a problem.
When I add each part in turn with -if-, it limits correctly, but when I put them together, it limits only one part, the bottom of the code.
What could be the cause please ..

   if (value <= 20) //
    {
      servo.write(20);//right
    }
    else
    {
      servo.write(value);  
    }

    if (value >= 150)
    {
      servo.write(150);// left
    }
    else
    {
      servo.write(value);
    }
2

20 is less than 150.

3

As they are written there ... each (separately) works fine. Together ..only one.
"value" is the indication of the magnetometer.

4

See post #2, then think it through.

5 
   if (value <= 150) //
    {
      servo.write(150);//right
    }
    else
    {
      servo.write(value);  
    }

    if (value >= 20)
    {
      servo.write(20);// left
    }
    else
     {
      servo.write(value);
    }

It doesn't work that way either.
I tried all sorts of options ... the one posted first, at least works separately ...

6

I have another question ... can the magnetometer output be changed from 180-0 and 0-180 ... to 0 -360?
Thank you for the answers.

7

Magnetometers measure magnetic fields - where does the 0-180 stuff come from?

(But, yes, a set of values with those ranges can be very easily be remapped - the concept is called "arithmetic")

8

I solved it by changing the map, the problem remains with the limitation of the servo travel, left-right.
Thank you.

9

Re-read reply #2.
Try plugging some values into your code, and see what comes out

10

Hello !
I changed that ... Degree = (mpu.getYaw () + 180);
How many attempts did I make with the map, I forgot that I also tried the one with 0-360 degrees. The result displayed in the console, without moving the sensor ... the data is chaotic. Example ... if I set it to one degree ... the value increases and does not stop, just as if I set the sensor to 359 ... the values decrease continuously..I don't know how to try again.

11

That line doesn't appear in any code you've posted so far.
(Hint)

12 
Degree = (mpu.getYaw () + 180);); //
13

The hint was meant to be a lot broader than that.

(Did that even compile?)

14

if( value <=150 && Value>20 ) might be something to think about doing.

15

Thank you for the answers.
1 - yes compiled.
2 - excuse me, I'll try, but if I don't solve with map 0-360, in vain I make the limitation work.

16

Please, you're just wasting everyone's time.

17

Excuse me, excuse me, I was wrong ....

Degree = (mpu.getYaw () + 180);
18

constrain: https://www.arduino.cc/reference/en/language/functions/math/constrain/

19

Thanks ..Dom.
...but if I don't solve map 0 to 360 compass, I make the limitation work in vain.

20

Before we make it to 100 replies (or even 30), it should be pointed out (again) that we can't see your code.