Features and advantages of automatic water meter test bench Many countries around the world are facing the current situation of water scarcity. With the intensification of the greenhouse effect and the improvement of urbanization, as well as the pollution of the water system caused by industrializat

NB IOT is an emerging technology in the field of IOT, which supports the cellular data connection of low-power devices in Wan, also known as low-power wide area network (lpwan). NB IOT supports efficient connection of devices with long standby time and high requirements for network connection. NB IO