The working hypothesis is that hypertension during the first post-transplant trimester is partly explained by the patient's hypervolemia. The main objective of the single-center observational study HTA ô Connect is to study the relationship between hypertension and extracellular hyperhydration, thanks to repeated self-measurements of blood pressure and impedancemetry between the 30th and the 90th day post-transplant, in 150 incident kidney transplant patients from our department, the ITUN (Institute of Urology-Nephrology Transplantation). The study population involves 150 incident kidney transplant patients, presenting to the Nantes University Hospital Transplant Institute for 1 month (D30), and presenting with hypertension ≥ 140/90mmHg and not treated with a diuretic. Data collected at the patients' homes will be used to establish a relationship between blood pressure and extracellular water volume. The data collected will not be used to follow up patients who participated in the study in this first stage of exploration.