This is an alarm system based on a Rapberry Pi acting as alarm center and one or more Arduinos as remote stations. Remote stations communicate with the alarm center through RF1276D27 module.
GPS module combine with LoRa RF1276 module reach over 10km in the beach
This is an HAB(high attitude Ballon) appplication based on a Arduino Pro and GPS module. It adopts LoRa radio module RF1276 as the wireless telemetry.It achieves 4.6km altitude and distance of 56km in the application at the first flight.