Esp8266 - 12 logger for measure temperatures and ADC values. Also it check wifi strength and number of possible wifies outside. I use 3 themometers, one is inside box (Tbox), where electronics is, second outside in dark (Tout), third on sun (Tsun).
Campbell Scientific CR6 datalogger at my QTH (residence). This logger is parsing data from a Davis weather station. The logger also takes other weather measurements inside the garage and in the lawn and controls various other devices.