The physiological and symptomatic changes that accompany an exacerbation can be detected by daily questionnaires, monitoring devices worn by the patient or easy to use appliances (respiratory rate sensor, touch pad for daily symptoms). These expensive devices require active patient involvement and a certain degree of skill by the patients, which limits their use. The main innovation of this project is that patients already have NIV treatment reimbursed by their health insurance and no further action will be required on the part of the patient to detect worsening. Changes recorded by the ventilator settings will trigger an alert and if needed early and appropriate patient care can be initiated.