A kind of Internet of things intrinsic safety rescue watch with fast networking and detection is designed. Taking NRF52832 as the control core. Bluetooth 5. 0 and mesh networking technology are used to realize fast networking of mesh network after disaster and fast detection of RSSI signal strength area and realize equipment interconnection. https://www.spidertattooz.com/Civil-Air-Patrol-Patch-National-Emergency-Services-Academy/