eSky cold chain system can be used for sea transportation. During cold chain sea transportation, it will need to monitor the temperature of refrigerated container all the time. Low-cost GPS trackers are used for this purpose so far, but since those containers are far from inland and no cellular coverage most times, GPS and LTE modules are a waste. Our low-cost master-slave system (one GPS tracker master device for many BLE slaves) is very suitable for such kind of application. Another usage is for supermarket where temperatures of many refrigerators are needed to monitor.
Low-cost system with LTE master device and BLE slave devices
Monitor temperature of refrigerator