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Changes for page Change Gateway Power

Last modified by Xiaoling on 2022/08/10 15:18
From version 18.1
edited by Kilight Cao
on 2022/06/23 14:58
Change comment: There is no comment for this version
To version 7.1
edited by Edwin Chen
on 2022/06/23 09:36
Change comment: There is no comment for this version

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1 +XWiki.Edwin
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1 -= Overview: =
2 -
3 -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.
4 -
5 -
6 6  = Change Power for Semtech UDP Paket forward connection =
7 7  
8 8  ----
9 9  
10 -In LoRaWAN protocol, the gateway output power refers to the downstream packets sent by Gateway. This output power is controlled by the LoRaWAN server.
5 +In LoRaWAN protocol, the gateway output power refer to the downstream packets sent by Gateway. This output power is controlled by LoRaWAN server.
11 11  
12 -Gateway maintains a power index in the file: /etc/lora/global_conf.json for example:
7 +Gateway maintain a power index in the file: /etc/lora/global_conf.json for example:
13 13  
14 14  
15 15  (% class="box" %)
... ... @@ -29,128 +29,15 @@
29 29   "dig_gain": 0
30 30  )))
31 31  
32 -(% class="mark" %)Note: If when lorawan server specifies a rf_power that is not listed above. gateway will choose the closest power. profile.
27 +(% class="mark" %)Note: If when lorawan server specify a rf_power which is not list above. gateway will choose the closest power. profile.
33 33  
34 34  
35 -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.
30 +When LoRaWAN server sends a downlink stream, server will also ask the gateway to use which rf_power as output. So user don't need to consider to control in the gateway side.
36 36  
37 -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.
32 +If user want to always use a higher power or a lower power. User can modify the pa_gain,mix_gain,dig_gain for specify rf_power to achieve this purpose. This is not recommended, because this might break the regulator for specific country.
38 38  
39 -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
34 +Please note, that the global_conf.json file will be overwritten by the match region files in /etc/lora/cfg-30x when changing settings in the web. So user needs to change the files in /etc/lora/cfg-cfg-30x instead of global_conf.json
40 40  
41 41  
42 -= Change Power for LoRaWAN Basic Station connection =
43 43  
44 -----
45 -
46 -First, you need to find out what is the chip module of the gateway?
47 -
48 -(% class="box infomessage" %)
49 -(((
50 -cat /var/iot/chip
51 -)))
52 -
53 -[[image:image-20220623140335-1.png||height="241" width="378"]]
54 -
55 -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]].
56 -
57 -
58 -**SX1301 Change Power for LoRaWAN Basic Station Connection example:**
59 -
60 -Gateway maintains a power index in the file: /etc/station/station-sx1301.conf
61 -
62 -(% class="box" %)
63 -(((
64 -{
65 - /* If slave-X.conf present this acts as default settings */
66 - "SX1301_conf": { /* Actual channel plan is controlled by server */
67 - "lorawan_public": true, /* is default */
68 - "clksrc": 1, /* radio_1 provides clock to concentrator */
69 - /* path to the SPI device, un-comment if not specified on the command line e.g., RADIODEV=/dev/spidev0.0 */
70 - "device": "/dev/spidev1.0",
71 - /* freq/enable provided by LNS - only HW specific settings listed here */
72 -
73 - ~|<~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-(% style="color:red" %)Add parameters:"tx_gain_lut"  :  [ TX_GAIN_LUT, .. ]
74 -
75 - "radio_0": {
76 - "type": "SX1257",
77 - "rssi_offset": -166.0,
78 - "tx_enable": true,
79 - "antenna_gain": 0
80 - },
81 - "radio_1": {
82 - "type": "SX1257",
83 - "rssi_offset": -166.0,
84 - "tx_enable": false
85 - }
86 - /* chan_multiSF_X, chan_Lora_std, chan_FSK provided by LNS */
87 - },
88 -)))
89 -
90 -Add parameters:**"tx_gain_lut": [ TX_GAIN_LUT, .. ]**
91 -
92 -(% class="box" %)
93 -(((
94 -{
95 - /* If slave-X.conf present this acts as default settings */
96 - "SX1301_conf": { /* Actual channel plan is controlled by server */
97 - "lorawan_public": true, /* is default */
98 - "clksrc": 1, /* radio_1 provides clock to concentrator */
99 - /* path to the SPI device, un-comment if not specified on the command line e.g., RADIODEV=/dev/spidev0.0 */
100 - "device": "/dev/spidev1.0",
101 - /* freq/enable provided by LNS - only HW specific settings listed here */
102 - "tx_gain_lut":[
103 - {"rf_power": 12, "pa_gain": 2, "mix_gain": 11, "dig_gain": 2, "dac_gain": 3}, 
104 - {"rf_power": 13, "pa_gain": 2, "mix_gain": 10, "dig_gain": 0, "dac_gain": 3},
105 - {"rf_power": 14, "pa_gain": 2, "mix_gain": 12, "dig_gain": 2, "dac_gain": 3},
106 - {"rf_power": 15, "pa_gain": 2, "mix_gain": 13, "dig_gain": 2, "dac_gain": 3},
107 -
108 -/* Index 3 refer to rf_power: 15dB. device will set the pa_gain,mix_gain,dig_gain */
109 -
110 -/* to the value mentioned here so as to generate 15dB output power.*/
111 - {"rf_power": 16, "pa_gain": 2, "mix_gain": 13, "dig_gain": 1, "dac_gain": 3},
112 - {"rf_power": 17, "pa_gain": 2, "mix_gain": 14, "dig_gain": 1, "dac_gain": 3},
113 - {"rf_power": 18, "pa_gain": 2, "mix_gain": 15, "dig_gain": 2, "dac_gain": 3},
114 - {"rf_power": 19, "pa_gain": 2, "mix_gain": 15, "dig_gain": 1, "dac_gain": 3},
115 - {"rf_power": 20, "pa_gain": 2, "mix_gain": 15, "dig_gain": 1, "dac_gain": 3},
116 - {"rf_power": 21, "pa_gain": 3, "mix_gain": 9, "dig_gain": 0, "dac_gain": 3},
117 - {"rf_power": 22, "pa_gain": 3, "mix_gain": 10, "dig_gain": 0, "dac_gain": 3},
118 - {"rf_power": 23, "pa_gain": 3, "mix_gain": 11, "dig_gain": 1, "dac_gain": 3},
119 - {"rf_power": 24, "pa_gain": 3, "mix_gain": 12, "dig_gain": 0, "dac_gain": 3},
120 - {"rf_power": 25, "pa_gain": 3, "mix_gain": 14, "dig_gain": 0, "dac_gain": 3},
121 - {"rf_power": 26, "pa_gain": 3, "mix_gain": 14, "dig_gain": 0, "dac_gain": 3},
122 - {"rf_power": 27, "pa_gain": 3, "mix_gain": 14, "dig_gain": 0, "dac_gain": 3}
123 - ],
124 - "radio_0": {
125 - "type": "SX1257",
126 - "rssi_offset": -166.0,
127 - "tx_enable": true,
128 - "antenna_gain": 0
129 - },
130 - "radio_1": {
131 - "type": "SX1257",
132 - "rssi_offset": -166.0,
133 - "tx_enable": false
134 - }
135 - /* chan_multiSF_X, chan_Lora_std, chan_FSK provided by LNS */
136 - },
137 -)))
138 -
139 -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]]
140 -
141 -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.
142 -
143 -(% style="color:red" %)Note: When the Settings are complete, click "Save&Apply" on the gateway's Web UI
144 -
145 -=== **Checking station Logs** ===
146 -
147 -Run the command:
148 -
149 -(% class="box infomessage" %)
150 -(((
151 -tail -f /var/iot/station.log
152 -)))
153 -
154 -[[image:image-20220623145437-2.png||height="501" width="694"]]
155 -
156 -
38 += Change Power for LoRaWAN Basic Station connection =
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