Make sure your gps_tty_path is set to the correct path of the GPS device. Else you have GPS, but the packet-forwarder won’t use it 
packet_forwarder/lora_pkt_fwd/cfg/global_conf.json.PCB_E286.EU868.gps at master · Lora-net/packet_forwarder · GitHub (the value is just an example, it needs to match the path on the Conduit!).
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