Wiki source code of Change Gateway Power
Last modified by Xiaoling on 2022/08/10 15:18
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18.2 | 1 | (% class="wikigeneratedid" %) |
| 2 | **Table of Contents:** | ||
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8.1 | 3 | |
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18.2 | 4 | {{toc/}} |
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| 9 | = 1. Overview = | ||
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18.3 | 12 | ((( |
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18.5 | 13 | In LoRaWAN protocol, the gateway transmit packet uses the output power base on the Power Index from the LoRaWAN server downlink. for example, the LoRaWAN server sends a downlink with this info** "rf_power=14"**, gateway got this info and it will search the index for rf_power=14 and use the related rf setting to set output power. In some cases, the LoRaWAN server might set the rf-power to a quite low value ( for example 0dB) which is not practical for use. In such a case, the User can manually change the **rf_power=0's** rf settings to a higher power out. Below are the methods. |
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18.3 | 14 | ))) |
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8.1 | 15 | |
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18.5 | 17 | |
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18.2 | 18 | = 2. Change Power for Semtech UDP Paket forward connection = |
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1.3 | 19 | |
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4.1 | 20 | |
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18.3 | 21 | ((( |
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9.1 | 22 | In LoRaWAN protocol, the gateway output power refers to the downstream packets sent by Gateway. This output power is controlled by the LoRaWAN server. |
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18.3 | 23 | ))) |
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1.3 | 24 | |
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18.3 | 25 | ((( |
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9.1 | 26 | Gateway maintains a power index in the file: /etc/lora/global_conf.json for example: |
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18.3 | 27 | ))) |
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1.3 | 28 | |
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5.1 | 29 | |
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1.3 | 30 | (% class="box" %) |
| 31 | ((( | ||
| 32 | "tx_lut_3": { | ||
| 33 | "desc": "TX gain table, index 3", ~/~/ Index 3 refer to rf_power: 15dB. device will set the pa_gain,mix_gain,dig_gain | ||
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18.3 | 34 | "pa_gain": 2, ~/~/ to the value mentioned here so to generate 15dB output power. |
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1.3 | 35 | "mix_gain": 10, |
| 36 | "rf_power": 15, | ||
| 37 | "dig_gain": 1 | ||
| 38 | }, | ||
| 39 | "tx_lut_4": { | ||
| 40 | "desc": "TX gain table, index 4", | ||
| 41 | "pa_gain": 2, | ||
| 42 | "mix_gain": 10, | ||
| 43 | "rf_power": 16, | ||
| 44 | "dig_gain": 0 | ||
| 45 | ))) | ||
| 46 | |||
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5.1 | 47 | |
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18.3 | 48 | ((( |
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18.2 | 49 | (% style="color:red" %)**Note: If when lorawan server specifies a rf_power that is not listed above. gateway will choose the closest power. profile.** |
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18.3 | 50 | ))) |
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6.1 | 51 | |
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18.2 | 52 | |
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18.3 | 53 | ((( |
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9.1 | 54 | When the LoRaWAN server sends a downlink stream, the server will also ask the gateway to use rf_power as output. So users don't need to consider controlling on the gateway side. |
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18.3 | 55 | ))) |
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1.3 | 56 | |
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18.3 | 57 | ((( |
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9.1 | 58 | If users want to always use a higher power or a lower power. Users can modify the pa_gain,mix_gain, and dig_gain to specify rf_power to achieve this purpose. This is not recommended, because this might break the regulator for a specific country. |
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18.3 | 59 | ))) |
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1.3 | 60 | |
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18.3 | 61 | ((( |
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9.1 | 62 | Please note, that the global_conf.json file will be overwritten by the match region files in /etc/lora/cfg-30x when changing settings on the web. So the user needs to change the files in /etc/lora/cfg-cfg-30x instead of global_conf.json |
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18.3 | 63 | ))) |
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7.1 | 64 | |
| 65 | |||
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18.5 | 66 | |
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18.2 | 67 | = 3. Change Power for LoRaWAN Basic Station connection = |
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7.1 | 68 | |
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9.1 | 69 | |
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18.4 | 70 | ((( |
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10.1 | 71 | First, you need to find out what is the chip module of the gateway? |
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18.4 | 72 | ))) |
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9.1 | 73 | |
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10.1 | 74 | (% class="box infomessage" %) |
| 75 | ((( | ||
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18.2 | 76 | **cat /var/iot/chip ** |
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10.1 | 77 | ))) |
| 78 | |||
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12.1 | 79 | [[image:image-20220623140335-1.png||height="241" width="378"]] |
| 80 | |||
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16.1 | 81 | Gateways using the SX1301 LoRaWAN Concentrator are the [[LG308>>https://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/LG308-LG301/&file=Datasheet_LG308_LoRaWAN_Gateway.pdf]] and [[DLOS8>>https://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/DLOS8/&file=DLOS8_LoRaWAN_Gateway_User_Manual_v1.3.pdf]]. |
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12.1 | 82 | |
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18.2 | 84 | (% style="color:blue" %)**SX1301 Change Power for LoRaWAN Basic Station Connection example:** |
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12.1 | 85 | |
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18.1 | 86 | Gateway maintains a power index in the file: /etc/station/station-sx1301.conf |
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13.1 | 87 | |
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10.1 | 88 | (% class="box" %) |
| 89 | ((( | ||
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12.1 | 90 | { |
| 91 | /* If slave-X.conf present this acts as default settings */ | ||
| 92 | "SX1301_conf": { /* Actual channel plan is controlled by server */ | ||
| 93 | "lorawan_public": true, /* is default */ | ||
| 94 | "clksrc": 1, /* radio_1 provides clock to concentrator */ | ||
| 95 | /* path to the SPI device, un-comment if not specified on the command line e.g., RADIODEV=/dev/spidev0.0 */ | ||
| 96 | "device": "/dev/spidev1.0", | ||
| 97 | /* freq/enable provided by LNS - only HW specific settings listed here */ | ||
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13.1 | 98 | |
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15.1 | 99 | ~|<~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-(% style="color:red" %)Add parameters:"tx_gain_lut" : [ TX_GAIN_LUT, .. ] |
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13.1 | 100 | |
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12.1 | 101 | "radio_0": { |
| 102 | "type": "SX1257", | ||
| 103 | "rssi_offset": -166.0, | ||
| 104 | "tx_enable": true, | ||
| 105 | "antenna_gain": 0 | ||
| 106 | }, | ||
| 107 | "radio_1": { | ||
| 108 | "type": "SX1257", | ||
| 109 | "rssi_offset": -166.0, | ||
| 110 | "tx_enable": false | ||
| 111 | } | ||
| 112 | /* chan_multiSF_X, chan_Lora_std, chan_FSK provided by LNS */ | ||
| 113 | }, | ||
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10.1 | 114 | ))) |
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13.1 | 115 | |
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15.1 | 116 | |
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18.2 | 117 | Add parameters:**"(% style="color:blue" %)tx_gain_lut": [ TX_GAIN_LUT, .. ](%%)** |
| 118 | |||
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14.1 | 119 | (% class="box" %) |
| 120 | ((( | ||
| 121 | { | ||
| 122 | /* If slave-X.conf present this acts as default settings */ | ||
| 123 | "SX1301_conf": { /* Actual channel plan is controlled by server */ | ||
| 124 | "lorawan_public": true, /* is default */ | ||
| 125 | "clksrc": 1, /* radio_1 provides clock to concentrator */ | ||
| 126 | /* path to the SPI device, un-comment if not specified on the command line e.g., RADIODEV=/dev/spidev0.0 */ | ||
| 127 | "device": "/dev/spidev1.0", | ||
| 128 | /* freq/enable provided by LNS - only HW specific settings listed here */ | ||
| 129 | "tx_gain_lut":[ | ||
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18.1 | 130 | {"rf_power": 12, "pa_gain": 2, "mix_gain": 11, "dig_gain": 2, "dac_gain": 3}, |
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14.1 | 131 | {"rf_power": 13, "pa_gain": 2, "mix_gain": 10, "dig_gain": 0, "dac_gain": 3}, |
| 132 | {"rf_power": 14, "pa_gain": 2, "mix_gain": 12, "dig_gain": 2, "dac_gain": 3}, | ||
| 133 | {"rf_power": 15, "pa_gain": 2, "mix_gain": 13, "dig_gain": 2, "dac_gain": 3}, | ||
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18.1 | 134 | |
| 135 | /* Index 3 refer to rf_power: 15dB. device will set the pa_gain,mix_gain,dig_gain */ | ||
| 136 | |||
| 137 | /* to the value mentioned here so as to generate 15dB output power.*/ | ||
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14.1 | 138 | {"rf_power": 16, "pa_gain": 2, "mix_gain": 13, "dig_gain": 1, "dac_gain": 3}, |
| 139 | {"rf_power": 17, "pa_gain": 2, "mix_gain": 14, "dig_gain": 1, "dac_gain": 3}, | ||
| 140 | {"rf_power": 18, "pa_gain": 2, "mix_gain": 15, "dig_gain": 2, "dac_gain": 3}, | ||
| 141 | {"rf_power": 19, "pa_gain": 2, "mix_gain": 15, "dig_gain": 1, "dac_gain": 3}, | ||
| 142 | {"rf_power": 20, "pa_gain": 2, "mix_gain": 15, "dig_gain": 1, "dac_gain": 3}, | ||
| 143 | {"rf_power": 21, "pa_gain": 3, "mix_gain": 9, "dig_gain": 0, "dac_gain": 3}, | ||
| 144 | {"rf_power": 22, "pa_gain": 3, "mix_gain": 10, "dig_gain": 0, "dac_gain": 3}, | ||
| 145 | {"rf_power": 23, "pa_gain": 3, "mix_gain": 11, "dig_gain": 1, "dac_gain": 3}, | ||
| 146 | {"rf_power": 24, "pa_gain": 3, "mix_gain": 12, "dig_gain": 0, "dac_gain": 3}, | ||
| 147 | {"rf_power": 25, "pa_gain": 3, "mix_gain": 14, "dig_gain": 0, "dac_gain": 3}, | ||
| 148 | {"rf_power": 26, "pa_gain": 3, "mix_gain": 14, "dig_gain": 0, "dac_gain": 3}, | ||
| 149 | {"rf_power": 27, "pa_gain": 3, "mix_gain": 14, "dig_gain": 0, "dac_gain": 3} | ||
| 150 | ], | ||
| 151 | "radio_0": { | ||
| 152 | "type": "SX1257", | ||
| 153 | "rssi_offset": -166.0, | ||
| 154 | "tx_enable": true, | ||
| 155 | "antenna_gain": 0 | ||
| 156 | }, | ||
| 157 | "radio_1": { | ||
| 158 | "type": "SX1257", | ||
| 159 | "rssi_offset": -166.0, | ||
| 160 | "tx_enable": false | ||
| 161 | } | ||
| 162 | /* chan_multiSF_X, chan_Lora_std, chan_FSK provided by LNS */ | ||
| 163 | }, | ||
| 164 | ))) | ||
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15.1 | 165 | |
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18.4 | 166 | ((( |
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18.2 | 167 | See this link for more station configuration parameters: [[Concentrator Design (v1.5) - LoRa Basics™ StationLoRa Basics™ Station ~| DEVELOPER PORTAL (semtech.com)>>url:https://lora-developers.semtech.com/build/software/lora-basics/lora-basics-for-gateways/?url=gw_v1.5.html]] |
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18.4 | 168 | ))) |
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18.1 | 169 | |
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18.2 | 170 | |
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18.4 | 171 | ((( |
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9.1 | 172 | If users want to always use a higher power or a lower power. Users can modify the pa_gain,mix_gain, and dig_gain to specify rf_power to achieve this purpose. This is not recommended, because this might break the regulator for a specific country. |
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18.5 | 173 | |
| 174 | |||
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18.4 | 175 | ))) |
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9.1 | 176 | |
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18.4 | 177 | ((( |
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18.2 | 178 | (% style="color:red" %)**Note: When the Settings are complete, click "Save&Apply" on the gateway's Web UI** |
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18.4 | 179 | ))) |
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18.1 | 180 | |
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18.5 | 182 | |
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18.2 | 183 | = 4. Checking station Logs = |
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18.4 | 186 | ((( |
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18.1 | 187 | Run the command: |
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18.4 | 188 | ))) |
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18.1 | 189 | |
| 190 | (% class="box infomessage" %) | ||
| 191 | ((( | ||
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18.2 | 192 | **tail -f /var/iot/station.log** |
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18.1 | 193 | ))) |
| 194 | |||
| 195 | [[image:image-20220623145437-2.png||height="501" width="694"]] | ||
| 196 | |||
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9.1 | 197 |