Quectel l70 on raspberry pi RAK831 gateway, GPS out of sync



  • Hello, All

    I have bought this RAK831 lorawan kit.I installed things network gateway and packet forwarder, everything works fine, except that in log there is a GPS warning " WARNING: [gps] GPS out of sync, keeping previous time reference". In itself GPS works fine, gets coordinates and altitude correctly, but when i looked in gateway stream it sends data without tmms parameter and At loraserver I get data without timeSinceGPSEpoch value. There is an image of it.
    alt text
    Is something wrong with GPS module or it's configuration problem of the packet forwarder of it's a bug?

    Thanks a lot!



  • Hi: Lwave

    I get the tmms info with some changes in packet forwarder. maybe you can refer this!

    1. install project https://github.com/RAKWireless/RAK831-LoRaGateway-rpi

    2. change /opt/ttn-gateway/packet_forwarder/lora_pkt_fwd/src/lora_pkt_fwd.c line: 2775

                   } else if (latest_msg == NMEA_RMC) { /* Get location from RMC frames */
                       //gps_process_coords();
                       gps_process_sync();
      
    3. recompile and run packet_forwarder

    as to "WARNING: [gps] GPS out of sync....", maybe your gps lost connection, it disable tmms update temporarily.



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