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Changes for page Change Gateway Power

Last modified by Xiaoling on 2022/08/10 15:18
From version 10.1
edited by Kilight Cao
on 2022/06/23 14:00
Change comment: There is no comment for this version
To version 2.1
edited by Xiaoling
on 2022/05/14 13:48
Change comment: There is no comment for this version

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Author
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1 -XWiki.Kilight
1 +XWiki.Xiaoling
Content
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1 -= Overview: =
1 += Introduction =
2 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.
3 +(((
4 +In LoRaWAN protocol, the gateway output power refer to the downstream packets sent by Gateway. This output power is controlled by LoRaWAN server.
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4 4  
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8 +Gateway maintain a power index in the file: /etc/lora/global_conf.json for example:
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5 5  
6 -= Change Power for Semtech UDP Paket forward connection =
7 -
8 -----
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.
11 -
12 -Gateway maintains a power index in the file: /etc/lora/global_conf.json for example:
13 -
14 -
15 15  (% class="box" %)
16 16  (((
13 +(((
17 17  "tx_lut_3": {
18 18   "desc": "TX gain table, index 3",        ~/~/ Index 3 refer to rf_power: 15dB. device will set the pa_gain,mix_gain,dig_gain 
19 19   "pa_gain": 2,                            ~/~/ to the value mentioned here so to generate 15dB output power.
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28 28   "rf_power": 16,
29 29   "dig_gain": 0
30 30  )))
28 +)))
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.
30 +(((
31 +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.
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33 33  
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.
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.
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
40 -
41 -
42 -= Change Power for LoRaWAN Basic Station connection =
43 -
44 -----
45 -
46 -First, you need to find out what is the chip module of the gateway?
47 -
48 -(% class="box infomessage" %)
49 49  (((
50 -cat /var/iot/chip
35 +
51 51  )))
52 52  
53 -(% class="box" %)
54 54  (((
55 -root@dragino-1bbe0c:~~# cat /var/iot/chip 
56 -sx1301
57 -root@dragino-1bbe0c:~~#
39 +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 recommend, because this might break the regulator for specify country.
58 58  )))
59 59  
60 -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.
61 -
42 +(((
62 62  
44 +)))
45 +
46 +(((
47 +Please note, the global_conf.json file will be overwrite by the match region files in /etc/lora/cfg-30x when change settings in the web. So user need to change the files in /etc/lora/cfg-cfg-30x instead of global_conf.json
48 +)))