ServoKit

Drive PCA9685 PWM/Servo Controller using Elixir

Installation

You can install this library by adding servo_kit to your list of dependencies in mix.exs:

def deps do
  [
    {:servo_kit, "~> 0.0.6"}
  ]
end

Examples

Basic usage

# Initialize a driver.
%{i2c_bus_name: "i2c-1", frequency: 50}
|> ServoKit.PCA9685.new()
# Set the duty cycle to 66.6% for Channel 15.
|> ServoKit.PCA9685.set_pwm_duty_cycle(15, 66.6)

Controling a standard servo

pid =
  ServoKit.init_servo_controller(
    driver_module: ServoKit.PCA9685,
    driver_options: %{},
    servo_module: ServoKit.StandardServo,
    servo_options: %{}
  )

# Set the angle to 180 degrees for Channel 0.
ServoKit.run_servo_command(pid, {:set_angle, [0, 180]})

Links

• PCA9685 Overview
• PCA9685 Datasheet