G302树莓派网关使用手册_V1.0.pdf

global_conf.json配置文件说明

  1. {
  2.     "SX130x_conf": {
  3.         "spidev_path": "/dev/spidev0.0",
  4.     "sx126x_path": "/dev/spidev0.1",
  5.     "i2cdev_path": "/dev/i2c-1",
  6.     "sx126x_busy_pin":13,
  7.     "sx126x_reset_pin":26,
  8.         "lorawan_public": true,
  9.         "clksrc": 0,
  10.         "antenna_gain": 0, /* antenna gain, in dBi */
  11.         "full_duplex": false,
  12.         "precision_timestamp": {
  13.             "enable": false,
  14.             "max_ts_metrics": 255,
  15.             "nb_symbols": 1
  16.         },
  17.         "radio_0": {
  18.             "enable": true,
  19.             "type": "SX1250",
  20.             "single_input_mode": true,
  21.             "freq": 470600000,
  22.             "rssi_offset": -207.0,
  23.             "rssi_tcomp": {"coeff_a": 0, "coeff_b": 0, "coeff_c": 20.41, "coeff_d": 2162.56, "coeff_e": 0},
  24.             "tx_enable": true,
  25.             "tx_freq_min": 500000000,
  26.             "tx_freq_max": 510000000,
  27.             "tx_gain_lut":[
  28.                 {"rf_power": -6, "pa_gain": 0, "pwr_idx":  0},
  29.                 {"rf_power": -3, "pa_gain": 0, "pwr_idx":  1},
  30.                 {"rf_power":  0, "pa_gain": 0, "pwr_idx":  2},
  31.                 {"rf_power":  3, "pa_gain": 1, "pwr_idx":  3},
  32.                 {"rf_power":  6, "pa_gain": 1, "pwr_idx":  4},
  33.                 {"rf_power": 10, "pa_gain": 1, "pwr_idx":  5},
  34.                 {"rf_power": 11, "pa_gain": 1, "pwr_idx":  6},
  35.                 {"rf_power": 12, "pa_gain": 2, "pwr_idx":  7},
  36.                 {"rf_power": 13, "pa_gain": 1, "pwr_idx":  8},
  37.                 {"rf_power": 14, "pa_gain": 2, "pwr_idx":  9},
  38.                 {"rf_power": 16, "pa_gain": 2, "pwr_idx": 10},
  39.                 {"rf_power": 20, "pa_gain": 3, "pwr_idx": 11},
  40.                 {"rf_power": 23, "pa_gain": 3, "pwr_idx": 12},
  41.                 {"rf_power": 25, "pa_gain": 3, "pwr_idx": 13},
  42.                 {"rf_power": 26, "pa_gain": 3, "pwr_idx": 14},
  43.                 {"rf_power": 27, "pa_gain": 3, "pwr_idx": 15}
  44.             ]
  45.         },
  46.         "radio_1": {
  47.             "enable": true,
  48.             "type": "SX1250",
  49.             "single_input_mode": true,
  50.             "freq": 471400000,
  51.             "rssi_offset": -207.0,
  52.             "rssi_tcomp": {"coeff_a": 0, "coeff_b": 0, "coeff_c": 20.41, "coeff_d": 2162.56, "coeff_e": 0},
  53.             "tx_enable": false
  54.         },
  55.         "chan_multiSF_0": {"enable": true, "radio": 0, "if": -300000},
  56.         "chan_multiSF_1": {"enable": true, "radio": 0, "if": -100000},
  57.         "chan_multiSF_2": {"enable": true, "radio": 0, "if":  100000},
  58.         "chan_multiSF_3": {"enable": true, "radio": 0, "if":  300000},
  59.         "chan_multiSF_4": {"enable": true, "radio": 1, "if": -300000},
  60.         "chan_multiSF_5": {"enable": true, "radio": 1, "if": -100000},
  61.         "chan_multiSF_6": {"enable": true, "radio": 1, "if":  100000},
  62.         "chan_multiSF_7": {"enable": true, "radio": 1, "if":  300000},
  63.         "chan_Lora_std":  {"enable": true, "radio": 1, "if": -200000, "bandwidth": 250000, "spread_factor": 7,
  64.                            "implicit_hdr": false, "implicit_payload_length": 17, "implicit_crc_en": false, "implicit_coderate": 1},
  65.         "chan_FSK":       {"enable": true, "radio": 1, "if":  300000, "bandwidth": 125000, "datarate": 50000}
  66.     },
  68.     "gateway_conf": {
  69.         "gateway_ID": "AA555A0000000000",
  70.         /* 更改为默认服务器地址/端口 */
  71.         "server_address": "39.98.253.192",
  72.         "serv_port_up": 1700,
  73.         "serv_port_down": 1700,
  74.         /* 为您的网络调整以下参数 */
  75.         "keepalive_interval": 10,
  76.         "stat_interval": 30,
  77.         "push_timeout_ms": 100,
  78.         /* 只转发有效数据包 */
  79.         "forward_crc_valid": true,
  80.         "forward_crc_error": false,
  81.         "forward_crc_disabled": false,
  82.         /* GPS 配置 */
  83.         "gps_tty_path": "/dev/ttyS0",
  84.         /* GPS 参考坐标 */
  85.         "ref_latitude": 0.0,
  86.         "ref_longitude": 0.0,
  87.         "ref_altitude": 0,
  88.         /* 信标参数 */
  89.         "beacon_period": 0,
  90.         "beacon_freq_hz": 869525000,
  91.         "beacon_datarate": 9,
  92.         "beacon_bw_hz": 125000,
  93.         "beacon_power": 14,
  94.         "beacon_infodesc": 0
  95.     },
  97.     "debug_conf": {
  98.         "ref_payload":[
  99.             {"id": "0xCAFE1234"},
  100.             {"id": "0xCAFE2345"}
  101.         ],
  102.         "log_file": "loragw_hal.log"
  103.     }
  104. }

global_conf.json配置
这个配置文件是lora_pkt_fwd程序运行的所有配置参数，其中有几点是我们平时会比较常用到的：

  • 如何修改基站的接收频点
  • 如何设置基站的ID
  • 如何设置基站的LoRaWAN NS指向
  • 如何设置基站的发射功率
  • 设置基站的接收频点

  • 设置接收频点主要是通过设置radio_0和radio_1的中心频点，并在此基础上设置8个接收信道的偏移来进行的，比如上面的参数，其中radio_0.freq==486600000,radio_1.freq==487400000,这就是radio_0和radio_1的中心频点，下面会根据设置的8个频点的偏移情况来开启8个接收信道，具体体现在

    1. "chan_multiSF_0": {"enable": true, "radio": 0, "if": -300000},
    2. "chan_multiSF_1": {"enable": true, "radio": 0, "if": -100000},
    3. "chan_multiSF_2": {"enable": true, "radio": 0, "if":  100000},
    4. "chan_multiSF_3": {"enable": true, "radio": 0, "if":  300000},
    5. "chan_multiSF_4": {"enable": true, "radio": 1, "if": -300000},
    6. "chan_multiSF_5": {"enable": true, "radio": 1, "if": -100000},
    7. "chan_multiSF_6": {"enable": true, "radio": 1, "if":  100000},
    8. "chan_multiSF_7": {"enable": true, "radio": 1, "if":  300000},

    我们以第一条为例
    chan_multiSF_X,指的是这个频点是可以接收多个SF的,这种频点最多可以有8个，这是由硬件决定的
    enable：true表示这个频点开启
    “radio”:0，表明此信道的中心频点是radio_0的中心频点
    “if”: -300000,表明此信道在中心频点上偏移-300000Hz
    故此条配置的含义是：
    此频点可接收多个SF
    此频点为radio_0.freq-300000=486600000-300000=486300000=486.3MHz
    设置基站的ID
    gateway_conf.gateway_ID即是
    如何设置基站的LoRaWAN NS指向
    gateway_conf.server_address为NS的地址
    gateway_conf.serv_port_up为NS的上行端口
    gateway_conf.serv_port_down为NS的下行端口
    如何设置基站的发射功率
    基站的发射功率

  • 首先是要有个radio的tx_enable是true的，即表示通过此芯片发送下行，这个和硬件- 有关，不过大部分情况下都是radio_0（大家都参考的原厂的参考设计）

  • tx_freq_min，tx_freq_max设置的是发射的最大，最小频点范围
  • tx_gain_lut是tx power的一个具体配置表，也就是说，当基站收到NS的下发命令时，会按照指定功率进行下发，若指定的功率不在这个表里面，那么可能就不会进行下发了，此表为什么这配我也不清楚，一般情况下不要去改动它

参考原文：树莓派-sx1302搭建lorawan网关