This dataset contains technical parameters (Voltage in V, current in mA, energy in Ah, internal pressure in mbar, water leak detection). This log is done by the COSTOF2 (COmmunication and STOrage Front-end). It is the Electronic core of BOREL the buoy that retrieve the data via satellite communication. It supports a weather station an a high resolution GPS. Two files are proposed, one for node V1 connected to the instruments, the other for the node V2 used for redundancy.