Semtech UDP packet-forwarder as the
gateway bridge backend. I am running into a problem when I send a downlink packet, it does not reach the node. I can see the packets in the
gateway bridge logs
time="2022-08-13T11:37:21.312829076Z" level=info msg="backend/basicstation: uplink frame received" gateway_id=429ccf59ce491977 uplink_id=819812df-9e08-4044-bf79-a81c563df589 time="2022-08-13T11:37:21.31337407Z" level=info msg="integration/mqtt: publishing event" event=up qos=0 topic=gateway/429ccf59ce491977/event/up uplink_id=819812df-9e08-4044-bf79-a81c563df589 time="2022-08-13T11:37:22.23341386Z" level=info msg="integration/mqtt: downlink frame received" downlink_id=0485f3e0-136b-4f75-a8fb-ae865750547d gateway_id=429ccf59ce491977 time="2022-08-13T11:37:22.233841924Z" level=info msg="backend/basicstation: downlink-frame message sent to gateway" downlink_id=0485f3e0-136b-4f75-a8fb-ae865750547d gateway_id=429ccf59ce491977 time="2022-08-13T11:37:31.300795751Z" level=info msg="integration/mqtt: publishing event" event=stats qos=0 stats_id=14ae2079-153c-4ef6-9a7f-f0898d2783fa topic=gateway/429ccf59ce491977/event/stats time="2022-08-13T11:37:31.954484853Z" level=info msg="backend/basicstation: uplink frame received" gateway_id=429ccf59ce491977 uplink_id=c35e77a6-892b-4112-9aee-9dbc5ce6e34e time="2022-08-13T11:37:31.954956127Z" level=info msg="integration/mqtt: publishing event" event=up qos=0 topic=gateway/429ccf59ce491977/event/up uplink_id=c35e77a6-892b-4112-9aee-9dbc5ce6e34e time="2022-08-13T11:37:32.874727641Z" level=info msg="integration/mqtt: downlink frame received" downlink_id=9afe50cd-e30d-4fc1-82a8-85e063e46520 gateway_id=429ccf59ce491977 time="2022-08-13T11:37:32.875311656Z" level=info msg="backend/basicstation: downlink-frame message sent to gateway" downlink_id=9afe50cd-e30d-4fc1-82a8-85e063e46520 gateway_id=429ccf59ce491977
I also see this in
basicstation the gateway
2022-08-13 11:28:05.692 [SYN:INFO] MCU/SX130X drift stats: min: +0.5ppm q50: +8.1ppm q80: +11.9ppm max: +13.8ppm - threshold q90: +12.4ppm 2022-08-13 11:28:05.693 [SYN:INFO] Mean MCU drift vs SX130X#0: 6.5ppm 2022-08-13 11:28:12.124 [SYN:ERRO] Failed to convert xtime to gpstime - last PPS sync too old: 40m35s 2022-08-13 11:28:14.664 [SYN:ERRO] Failed to convert xtime to gpstime - last PPS sync too old: 40m38s 2022-08-13 11:28:15.592 [S2E:WARN] Received 'dnmsg' before 'router_config' - dropped 2022-08-13 11:28:25.255 [SYN:ERRO] Failed to convert xtime to gpstime - last PPS sync too old: 40m48s 2022-08-13 11:28:26.186 [S2E:WARN] Received 'dnmsg' before 'router_config' - dropped 2022-08-13 11:28:35.442 [SYN:ERRO] Failed to convert xtime to gpstime - last PPS sync too old: 40m59s 2022-08-13 11:28:36.410 [SYN:ERRO] Failed to convert xtime to gpstime - last PPS sync too old: 41m0s 2022-08-13 11:28:37.346 [S2E:WARN] Received 'dnmsg' before 'router_config' - dropped
Received 'dnmsg' before 'router_config' - dropped is keep popping up as the downlink message persists in the downlink queue.
When I point the gateway to
ttn server, I am able to send a downlink without any issues. So I am pretty sure that I have not configured the
gateway-bridge.toml file for the reference
# See https://www.chirpstack.io/gateway-bridge/install/config/ for a full # configuration example and documentation. [backend] type="basic_station" # Semtech UDP packet-forwarder backend. [backend.semtech_udp] # ip:port to bind the UDP listener to # # Example: 0.0.0.0:1700 to listen on port 1700 for all network interfaces. # This is the listener to which the packet-forwarder forwards its data # so make sure the 'serv_port_up' and 'serv_port_down' from your # packet-forwarder matches this port. udp_bind = "0.0.0.0:1700" # Skip the CRC status-check of received packets # # This is only has effect when the packet-forwarder is configured to forward # LoRa frames with CRC errors. skip_crc_check = false # Fake RX timestamp. # # Fake the RX time when the gateway does not have GPS, in which case # the time would otherwise be unset. fake_rx_time=false # Basic Station backend. [backend.basic_station] # ip:port to bind the Websocket listener to. bind="0.0.0.0:3001" # TLS certificate and key files. # # When set, the websocket listener will use TLS to secure the connections # between the gateways and ChirpStack Gateway Bridge (optional). tls_cert="" tls_key="" # TLS CA certificate. # # When configured, ChirpStack Gateway Bridge will validate that the client # certificate of the gateway has been signed by this CA certificate. ca_cert="" # Stats interval. # # This defines the interval in which the ChirpStack Gateway Bridge forwards # the uplink / downlink statistics. stats_interval="30s" # Ping interval. ping_interval="1m0s" # Timesync interval. # # This defines the interval in which the ChirpStack Gateway Bridge sends # a timesync request to the gateway. Setting this to 0 disables sending # timesync requests. timesync_interval="1h0m0s" # Read timeout. # # This interval must be greater than the configured ping interval. read_timeout="1m5s" # Write timeout. write_timeout="1s" # Region. # # Please refer to the LoRaWAN Regional Parameters specification # for the complete list of common region names. region="AS923" # Minimal frequency (Hz). frequency_min=915000000 # Maximum frequency (Hz). frequency_max=928000000 # Concentrator configuration. # # This section contains the configuration for the SX1301 concentrator chips. # Example: [[backend.basic_station.concentrators]] # Multi-SF channel configuration. [backend.basic_station.concentrators.multi_sf] # Frequencies (Hz). frequencies=[ 923200000, 923400000, 922200000, 922400000, 922600000, 922800000, 923000000, 922000000, ] # LoRa STD channel. [backend.basic_station.concentrators.lora_std] # Frequency (Hz). frequency=923000000 # Bandwidth (Hz). bandwidth=250000 # Spreading factor. spreading_factor=7 # FSK channel. [backend.basic_station.concentrators.fsk] # Frequency (Hz). frequency=922000000 [integration] marshaler="json" [integration.mqtt.auth.generic] servers=["tcp://mosquitto:1883"] username="" password=""