E52-900NW22S LoRa spread spectrum technology wireless serial port LoRa MESH networking module [Interface type]:UART serial port [Working frequency]:850.125~929.125MHz [Transmit power:]:22dBm [Communication distance]:2.5km [Size]:20*14mm [Product weight]:1.2±0.1g [Introduction]:E52-900NW22S is a wireless serial...