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Author

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1		-XWiki.Edwin
	1	+XWiki.Xiaoling

Content

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1		-(% class="wikigeneratedid" %)
2		-= Overview: =
	1	+= Introduction =
3	3
4		-In LoRaWAN protocol, the gateway transmit packet use the output power base on the Power Index from LoRaWAN server downlink. for example: LoRaWAN server send downlink with this info "rf_power=14", gatewat 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 case, the LoRaWAN server might set the rf-power to a quite low value ( for example 0dB) which is not practical for use. In such case, User can manunal change the rf_power=0's rf settings to a higher power out. Below are the methods.
5		-
6		-
7		-= Change Power for Semtech UDP Paket forward connection =
8		-
9	9	----
10	10
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11	11	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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12	12
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13	13	Gateway maintain a power index in the file: /etc/lora/global_conf.json for example:
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14	14
15		-
16	16	(% class="box" %)
17	17	(((
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18	18	"tx_lut_3": {
19	19	"desc": "TX gain table, index 3",        ~/~/ Index 3 refer to rf_power: 15dB. device will set the pa_gain,mix_gain,dig_gain
20	20	"pa_gain": 2,                            ~/~/ to the value mentioned here so to generate 15dB output power.
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29	29	"rf_power": 16,
30	30	"dig_gain": 0
31	31	)))
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32	32
33		-(% class="mark" %)Note: If when lorawan server specify a rf_power which is not list above. gateway will choose the closest power. profile.
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35		-
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36	36	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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37	37
38		-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.
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	37	+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.
	38	+)))
39	39
40		-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
41		-
42		-
43		-
44		-= Change Power for LoRaWAN Basic Station connection =
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	41	+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
	42	+)))