Donghai Bridge:Smart City – LPWAN for Bridge
• The length of donghai bridge is 32.5km and  the length of the offshore bridge is 24km, with no carrier signal.
• Only use 2 ZETA APs and 8 Motes to cover the  whole bridge with the ZETA Network.
• Monitor the condition of expansion joints, open/close of expansion doors, attitude of signs, illegal landing of bridge piers, open/close of lampshades and light boxes, etc