Re: Cannot control Servo using "jsupm_servo" module

As a workaround you can use the following code to control your servo:

Code:

var AIO_pin = 0;//setup access analog input Analog pin #0 (A0) i.e. output of potentiometer. Assuming values read is between 0 and 1000.

var Servo_pin = 5;//Initialize PWM on Digital Pin #5 (D5) and enable the pwm pin

var PWM_period_us = 20000;

var Min_Duty_Cycle = 0.029;

var Max_Duty_Cycle = 0.087;

var mraa = require("mraa"); //require mraa

console.log('MRAA Version: ' + mraa.getVersion()); //write the mraa version to the Intel XDK console

var analogPin0 = new mraa.Aio(AIO_pin);

var pwm = new mraa.Pwm(Servo_pin);

pwm.enable(false);

pwm.period_us(PWM_period_us);

pwm.enable(true);

moveServo();

function moveServo() {

    var analogValue = analogPin0.read(); //read the value of the analog pin

    var processedValue = MapRange(analogValue,0,1000,Min_Duty_Cycle,Max_Duty_Cycle);

    pwm.write(processedValue); //Write duty cycle value.

    console.log(analogValue+" "+processedValue+pwm.read());

    setTimeout(moveServo,200);

}

function MapRange (in_vaule, in_min, in_max, out_min, out_max) {

    var output = (in_vaule - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;

    if (output >= out_max) {

        output = out_max;

    } else {

        if (output <= out_min) {

            output = out_min;

        }

    }          

    return output

}