We are interested in ZigBee Modules. You may recommend us which long distance communication RF Module is the suitable underground the environment in tunnel mines environment. Multiple ZigBee communicates with PC and To bring the data of multiple ZigBee from inside underground to the ground station at the same time, we collect data from 3000 feet depths in underground area. We may Suggest which modules we may be purchased for our application and gateway.
Your response highly appreciated