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Author

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1		-XWiki.Xiaoling
	1	+XWiki.Edwin

Content

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1		-= Introduction =
	1	+(% class="wikigeneratedid" %)
	2	+= Overview: =
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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.
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	6	+
	7	+= Change Power for Semtech UDP Paket forward connection =
	8	+
	9	+----
	10	+
4	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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8	8	Gateway maintain a power index in the file: /etc/lora/global_conf.json for example:
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10	10
	15	+
11	11	(% class="box" %)
12	12	(((
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14	14	"tx_lut_3": {
15	15	"desc": "TX gain table, index 3",        ~/~/ Index 3 refer to rf_power: 15dB. device will set the pa_gain,mix_gain,dig_gain
16	16	"pa_gain": 2,                            ~/~/ to the value mentioned here so to generate 15dB output power.
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25	25	"rf_power": 16,
26	26	"dig_gain": 0
27	27	)))
28		-)))
29	29
30		-(((
	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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31	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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34		-(((
35		-
36		-)))
	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.
37	37
38		-(((
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.
40		-)))
	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
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42		-(((
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44		-)))
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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		-)))
	43	+
	44	+= Change Power for LoRaWAN Basic Station connection =