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Changes for page Change Gateway Power

Last modified by Xiaoling on 2022/08/10 15:18
From version 18.5
edited by Xiaoling
on 2022/08/10 15:18
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.Xiaoling
1 +XWiki.Edwin
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1 -(% class="wikigeneratedid" %)
2 -**Table of Contents:**
1 += Change Power for Semtech UDP Paket forward connection =
3 3  
4 -{{toc/}}
3 +----
5 5  
5 +In LoRaWAN protocol, the gateway output power refer to the downstream packets sent by Gateway. This output power is controlled by LoRaWAN server.
6 6  
7 +Gateway maintain a power index in the file: /etc/lora/global_conf.json for example:
7 7  
8 8  
9 -= 1.  Overview =
10 -
11 -
12 -(((
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.
14 -)))
15 -
16 -
17 -
18 -= 2.  Change Power for Semtech UDP Paket forward connection =
19 -
20 -
21 -(((
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.
23 -)))
24 -
25 -(((
26 -Gateway maintains a power index in the file: /etc/lora/global_conf.json for example:
27 -)))
28 -
29 -
30 30  (% class="box" %)
31 31  (((
32 32  "tx_lut_3": {
33 33   "desc": "TX gain table, index 3",        ~/~/ Index 3 refer to rf_power: 15dB. device will set the pa_gain,mix_gain,dig_gain 
34 - "pa_gain": 2,  ~/~/ to the value mentioned here so to generate 15dB output power.
14 + "pa_gain": 2,                            ~/~/ to the value mentioned here so to generate 15dB output power.
35 35   "mix_gain": 10,
36 36   "rf_power": 15,
37 37   "dig_gain": 1
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44 44   "dig_gain": 0
45 45  )))
46 46  
27 +(% class="mark" %)Note: If when lorawan server specify a rf_power which is not list above. gateway will choose the closest power. profile.
47 47  
48 -(((
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.**
50 -)))
51 51  
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.
52 52  
53 -(((
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.
55 -)))
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.
56 56  
57 -(((
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.
59 -)))
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
60 60  
61 -(((
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
63 -)))
64 64  
65 65  
66 -
67 -= 3.  Change Power for LoRaWAN Basic Station connection =
68 -
69 -
70 -(((
71 -First, you need to find out what is the chip module of the gateway?
72 -)))
73 -
74 -(% class="box infomessage" %)
75 -(((
76 -**cat /var/iot/chip **
77 -)))
78 -
79 -[[image:image-20220623140335-1.png||height="241" width="378"]]
80 -
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]].
82 -
83 -
84 -(% style="color:blue" %)**SX1301 Change Power for LoRaWAN Basic Station Connection example:**
85 -
86 -Gateway maintains a power index in the file: /etc/station/station-sx1301.conf
87 -
88 -(% class="box" %)
89 -(((
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 */
98 -
99 - ~|<~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-(% style="color:red" %)Add parameters:"tx_gain_lut"  :  [ TX_GAIN_LUT, .. ]
100 -
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 - },
114 -)))
115 -
116 -
117 -Add parameters:**"(% style="color:blue" %)tx_gain_lut": [ TX_GAIN_LUT, .. ](%%)**
118 -
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":[
130 - {"rf_power": 12, "pa_gain": 2, "mix_gain": 11, "dig_gain": 2, "dac_gain": 3}, 
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},
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.*/
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 -)))
165 -
166 -(((
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]]
168 -)))
169 -
170 -
171 -(((
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.
173 -
174 -
175 -)))
176 -
177 -(((
178 -(% style="color:red" %)**Note: When the Settings are complete, click "Save&Apply" on the gateway's Web UI**
179 -)))
180 -
181 -
182 -
183 -= 4.  Checking station Logs =
184 -
185 -
186 -(((
187 -Run the command:
188 -)))
189 -
190 -(% class="box infomessage" %)
191 -(((
192 -**tail -f /var/iot/station.log**
193 -)))
194 -
195 -[[image:image-20220623145437-2.png||height="501" width="694"]]
196 -
197 -
38 += Change Power for LoRaWAN Basic Station connection =
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