code: func (g *Driver) ServoWrite(srvo Servo, angle byte) error {
  	pulseWidthRange := 1850
  	if angle > 180 {
  		angle = 180
  	}
  	if angle < 0 {
  		angle = 0
  	}
  	pulseWidth := ((1500 - (pulseWidthRange / 2)) + ((pulseWidthRange / 180) * int(angle)))
  	return g.SetServo(srvo, uint16(pulseWidth))
  }
docs: // ServoWrite writes an angle (0-180) to the given servo (servo 1 or servo 2).