Meet the Loko: a tiny open source GPS tracker that sends navigation data via LoRa radio and does not require a SIM card to work. It can work anywhere even when there is no LTE coverage. The transmitter weighs only 12 grams. The receiver gets data from the transmitter at a pre-configured time interval and sends it to your phone via app. You will be able to see the location of the transmitter on a map automatically. You can pair 30 transmitters to a receiver.
Due to its tiny, lightweight design, Loko is ideal for drones. The range is over 5km. The battery lasts up to 250 days. The Loko air unit (transmitter) has an IPX7 rating. The app is available for iPhone and Android devices.[where to get it]