The Things Network LoRaWAN Stack V3 学习笔记 2.4 使用 Packet Forward 让 LoRaWAN 网关接入
前言
应用创建好之后，先让 LoRaWAN 网关接入进来。本篇笔记使用树莓派 LoRaWAN 网关搭配 Packet Forward，做修改后接入到 Stack。
小能手这段时间在学习 The Things Network LoRaWAN Stack V3，从使用和代码等角度对该 Stack 进行了分析，详细可点此查看。
1 网关端修改
| Purpose | Protocol | Authentication | Port | Port (TLS) |
|---|---|---|---|---|
| Gateway data | Semtech Packet Forwarder | None | 1700 (UDP) | N/A |
| Gateway data | MQTT | API key, token | 1882 | 8882 |
我们先使用 Packet Forward 让网关接入，主要修改 IP 和 GWEUI，这些主要是在 local_conf.json 里调整。
{
"gateway_conf": {
"gateway_ID": "33800000A0000001",
"server_address": "your_ip",
"serv_port_up": 1700,
"serv_port_down": 1700,
"serv_enabled": true,
"ref_latitude": 0,
"ref_longitude": 0,
"ref_altitude": 0
}
}
其他关于网关的CN470 频段等信息，可以在 global_conf.json 里调整。
2 网关接入日志
NS 上可以使用 netstat 查看下监听端口的打开情况。
# netstat -nua
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
udp 0 0 127.0.0.1:6969 0.0.0.0:*
udp 0 0 0.0.0.0:68 0.0.0.0:*
udp 0 0 172.20.0.1:123 0.0.0.0:*
udp 0 0 172.19.0.1:123 0.0.0.0:*
udp 0 0 172.18.0.1:123 0.0.0.0:*
udp 0 0 172.17.0.1:123 0.0.0.0:*
udp 0 0 10.0.8.5:123 0.0.0.0:*
udp 0 0 127.0.0.1:123 0.0.0.0:*
udp 0 0 0.0.0.0:123 0.0.0.0:*
udp6 0 0 :::1700 :::*
udp6 0 0 :::2700 :::*
udp6 0 0 :::123 :::*
网关上线后在 NS 上会得到日志：
DEBUG Run database query duration=2ms grpc_method=GetIden
tifiersForEUI grpc_service=ttn.lorawan.v3.GatewayRegistry namespace=db query=SELewaECT id, created_at, updated_at, gateway_id, gateway_eui FROM "gateways" WHERE "
gateways"."deleted_at" IS NULL AND ((gateway_eui = $1)) ORDER BY "gateways"."id"
ASC LIMIT 1 request_id=01D6SZGVKPBBNBVFPMC8MKXRYJ rows=1 source=gateway_store.g
o:115 values=[33800000A0000001]
INFO Finished unary call duration=3.739592ms grpc_method=
GetIdentifiersForEUI grpc_service=ttn.lorawan.v3.GatewayRegistry namespace=grpc
request_id=01D6SZGVKPBBNBVFPMC8MKXRYJ
DEBUG Finished unary call duration=4.471146ms grpc_method=
GetIdentifiersForEUI grpc_service=ttn.lorawan.v3.GatewayRegistry namespace=grpc
DEBUG Run database query duration=2ms grpc_method=Get grp
c_service=ttn.lorawan.v3.GatewayRegistry namespace=db query=SELECT id, created_a
t, updated_at, gateway_id, gateway_eui, frequency_plan_id, schedule_downlink_lat
e, enforce_duty_cycle, downlink_path_constraint FROM "gateways" WHERE "gateways
"."deleted_at" IS NULL AND ((gateway_id = $1) AND (gateway_eui = $2)) ORDER BY "
gateways"."id" ASC LIMIT 1 request_id=01D6SZGVKTAJ46Z1Y0JTRNT91E rows=1 source=g
ateway_store.go:115 values=[ttgtw1 33800000A0000001]
INFO Finished unary call duration=3.249904ms grpc_method=
Get grpc_service=ttn.lorawan.v3.GatewayRegistry namespace=grpc request_id=01D6SZ
GVKTAJ46Z1Y0JTRNT91E
DEBUG Finished unary call duration=3.686266ms grpc_method=
Get grpc_service=ttn.lorawan.v3.GatewayRegistry namespace=grpc
INFO Connected gateway_eui=33800000A0000001 gat
eway_uid=ttgtw1 namespace=gatewayserver/io/udp
断开的日志：
WARN Downlink path expired gateway_eui=33800000A0000001 gateway_uid=ttgtw1 namespace=gatewayserver/io/udp
WARN Connection expired gateway_eui=33800000A0000001 namespace=gatewayserver/io/udp
INFO Disconnected gateway_eui=33800000A0000001 gateway_uid=ttgtw1 namespace=gatewayserver/io/udp
3 网关端的一些备忘
如果网关无法建立 socket，可以使用 nc 工具测试下网络情况。
$ nc -z -v -u your_ip 1700
found 0 associations
found 1 connections:
1: flags=82<CONNECTED,PREFERRED>
outif (null)
src 10.70.84.139 port 52632
dst your_ip port 1700
rank info not available
Connection to your_ip port 1700 [udp/mps-raft] succeeded!
netstat 也是个不错的选择。
$ netstat -nua
END
