HEM Data rolled out the DAWN Mini Logger for in-vehicle diagnostics. It is the industry’s smallest high speed data logger. The DAWN Mini Logger is small enough to fit within the mating OBD (J1962) connector under the dashboard. Its small size means it is easy to install. The mini-data logger just snaps onto the OBD (On-board Diagnostics) connector. It is then ready to acquire data and is hidden from the driver.