In the previous article we have learned about Wifi, today plc247.com and you continue to learn about another quite common protocol: Cellular
For IoT / M2M applications that require long communication distances, or are not limited by geographical distance, the choice of data transmission line via GPRS / 3G / LTE mobile network is a good choice. Best. Of course, for solution design engineers, it is well known that transmitting data long distances will consume the corresponding energy. And the energy consumption factor is easily accepted in this problem.
Currently, the devices / terminals in the industry are supported to integrate physical communication ports as standard: RS232, RS485, RS422 or Ethernet. Since all mobile media are supported by Serial or Ethernet ports, the integration of wireless communication solutions is no longer difficult or limited by other objective factors.
Features of the Cellular protocol
+ Standard: GSM/GPRS/EDGE (2G), UMTS/HSPA (3G), LTE (4G)
+ Frequencies: 900/1800/1900/2100MHz
+ Range: 35km max for GSM; 200km max for HSPA
+ Data Rates (typical download): 35-170kps (GPRS), 120-384kbps (EDGE), 384Kbps-2Mbps (UMTS), 600kbps-10Mbps (HSPA), 3-10Mbps (LTE)