Automated Oxygen Administration in Patients With Hypoxemic Pneumonia and Pleuropneumonia

Inclusion Criteria: * Adult * Patient living at home or in an institution * Patient hospitalized for less than 48 hours * Pneumonia defined (according to the 2006 French-speaking infectious pneumology society (SPILF) criteria) by: * respiratory functional symptoms (cough, sputum, dyspnea, chest pain) and * Hyperthermia \>38,5°C or hypothermia \<36°C and * Radiological Signs of Pneumonia * Hypoxia : SpO2 \< 94% in ambient air and/or PaO2\< 60 mmHg in ambient air Exclusion Criteria: * Pneumonia acquired at the hospital. * Patient hospitalized in another department more than 48 hours before admission * Chronic respiratory failure * Active neoplasia * Patients undergoing oxygen therapy and / or long-term NIV * Associated cardiac decompensation (clinical signs and / or NTproBNP\> 1800ng / mL) (3 * Initial Need for high flow oxygen therapy or ventilatory support (NIV, VI) * Difficulties expected from home support.