In IOKEY solution, the device itself never talks to the server.
The Cloud, or even the internet. The communication between the device and the system server is over Bluetooth or LoRa network through only authorized smart phone.
DAMBEE TECHNOLOGY Co., Ltd.
358-25, Hosu-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do, Republic of Korea
+82-10-5454-3703 ( firstname.lastname@example.org )