How can i get sensors data

[cosmohoo]

I wanna use fitbit versa's sensor's data. I made project using sensor template.
I will make fall algorithm using these sensors data. 

How can I get sensor data .

ex)
double accel.x, accel.y, accel.z;

var accsvm = Math.sqrt( Math.pow(accel.x , 2) + Math.pow(accel.y , 2) + Math.pow(accel.z , 2));

I wanna use like that. But accel.x don't read any data. I don't know how to do this

Please give me help.

[philvms]

https://dev.fitbit.com/build/guides/sensors/

[cosmohoo]

I wanna make a fall detection app using accel and gyro sensors.

And I've made algorithm using sensor template of SDK. 
But there is a problem.

I wana use accel and gyro's data. But it didn't work.
And I don't know how to make a output. 

Please give me help. 

I want to make a output of mangle. 

Under is my code. 

[Walidaljaouni]

hello, can anyone help me with my project? its related to this topic, i can pay. thanks