Validation of the Artificial Pancreas Diabeloop Algorithm in the Hospital

To assess whether the DIABELOOP algorithm provides better glycemic control than the usual algorithm of T1D patients on pump therapy: * at meals, with CHO roughly assessed by the patient. * during and after physical activity sessions qualified as moderate by the patient. Primary endpoint : time within the glycemic reference range. The study will be conduct with 15 patients at the following investigation centers : Corbeil Hospital, CHU of Grenoble, and CHU of Montpellier.