I’ve been using a smart sensor from SensorPush. I have a basic temperature/humidity sensor that communicates with an iPhone app using low-energy Bluetooth (BLE). The sensor pushes logged data to the app whenever it is in range, and the app can display the logs in various formats, export, hi/low alarms, etc. Basic sensor is tiny (about 2 cu.in.) powered by a $2 battery for 18 months or so. Range advertised as 100M, but with intervening objects my range is about 150 feet. App supports multiple sensors. SensorPush also sells a wifi gateway ($100) that I have not yet tried. Sensors push data to the gateway which then uploads to a free cloud account that supports a browser-based dashboard, email alerts, API. SensorPush says this can then provide support to other IoT clients to control devices, etc. I reglazed my home-built 10X24 freestanding “cool” solar greenhouse last year. It was glazed with recycled double-pane patio glass 30 or more years ago. Built a new window support structure from 2x6 cedar decking, covered with 16mm triple-wall polycarbonate. Three 2’x4’ Bayliss-operated roof vents provide ventilation, supplemented by a 24” fan/vent to lower humidity in the winter. Cooler in summer, warmer in winter. Back and side walls are thick concrete, and with a 300G water tank little supplemental heat is needed here in Zone 8. Keith Maw Brier, WA _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/… Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net>