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1		-XWiki.Xiaoling
	1	+XWiki.Kilight

Content

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1		-(% class="wikigeneratedid" %)
2		-**Table of Contents:**
	1	+= Overview: =
3	3
4		-{{toc/}}
5		-
6		-
7		-
8		-
9		-= 1.  Overview =
10		-
11		-
12	12	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.
13	13
14	14
15		-= 2.  Change Power for Semtech UDP Paket forward connection =
	6	+= Change Power for Semtech UDP Paket forward connection =
16	16
	8	+----
17	17
18	18	In LoRaWAN protocol, the gateway output power refers to the downstream packets sent by Gateway. This output power is controlled by the LoRaWAN server.
19	19
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37	37	"dig_gain": 0
38	38	)))
39	39
	32	+(% class="mark" %)Note: If when lorawan server specifies a rf_power that is not listed above. gateway will choose the closest power. profile.
40	40
41		-(% style="color:red" %)**Note: If when lorawan server specifies a rf_power that is not listed above. gateway will choose the closest power. profile.**
42	42
43		-
44	44	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.
45	45
46	46	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.
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48	48	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
49	49
50	50
51		-= 3.  Change Power for LoRaWAN Basic Station connection =
	42	+= Change Power for LoRaWAN Basic Station connection =
52	52
	44	+----
53	53
54	54	First, you need to find out what is the chip module of the gateway?
55	55
56	56	(% class="box infomessage" %)
57	57	(((
58		-**cat /var/iot/chip **
	50	+cat /var/iot/chip
59	59	)))
60	60
61	61	[[image:image-20220623140335-1.png||height="241" width="378"]]
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63	63	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]].
64	64
65	65
66		-(% style="color:blue" %)**SX1301 Change Power for LoRaWAN Basic Station Connection example:**
	58	+**SX1301 Change Power for LoRaWAN Basic Station Connection example:**
67	67
68		-Gateway maintains a power index in the file: /etc/station/station-sx1301.conf
	60	+Gateway maintains a power index in the file: /etc/station/station-sx1301.conf for example:
69	69
70	70	(% class="box" %)
71	71	(((
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95	95	},
96	96	)))
97	97
	90	+**Add parameters:"tx_gain_lut"  :  [ TX_GAIN_LUT, .. ]**
98	98
99		-Add parameters:**"(% style="color:blue" %)tx_gain_lut": [ TX_GAIN_LUT, .. ](%%)**
100		-
101	101	(% class="box" %)
102	102	(((
103	103	{
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109	109	"device": "/dev/spidev1.0",
110	110	/* freq/enable provided by LNS - only HW specific settings listed here */
111	111	"tx_gain_lut":[
112		- {"rf_power": 12, "pa_gain": 2, "mix_gain": 11, "dig_gain": 2, "dac_gain": 3},
	103	+ {"rf_power": 12, "pa_gain": 2, "mix_gain": 11, "dig_gain": 2, "dac_gain": 3},  ~/~/ Index 0 refer to rf_power: 12dB. device will set the pa_gain,mix_gain,dig_gain
113	113	{"rf_power": 13, "pa_gain": 2, "mix_gain": 10, "dig_gain": 0, "dac_gain": 3},
114	114	{"rf_power": 14, "pa_gain": 2, "mix_gain": 12, "dig_gain": 2, "dac_gain": 3},
115	115	{"rf_power": 15, "pa_gain": 2, "mix_gain": 13, "dig_gain": 2, "dac_gain": 3},
116		-
117		-/* Index 3 refer to rf_power: 15dB. device will set the pa_gain,mix_gain,dig_gain */
118		-
119		-/* to the value mentioned here so as to generate 15dB output power.*/
120	120	{"rf_power": 16, "pa_gain": 2, "mix_gain": 13, "dig_gain": 1, "dac_gain": 3},
121	121	{"rf_power": 17, "pa_gain": 2, "mix_gain": 14, "dig_gain": 1, "dac_gain": 3},
122	122	{"rf_power": 18, "pa_gain": 2, "mix_gain": 15, "dig_gain": 2, "dac_gain": 3},
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145	145	},
146	146	)))
147	147
148		-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]]
149		-
150		-
151	151	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.
152	152
153		-(% style="color:red" %)**Note: When the Settings are complete, click "Save&Apply" on the gateway's Web UI**
154		-
155		-
156		-= 4.  Checking station Logs =
157		-
158		-
159		-Run the command:
160		-
161		-(% class="box infomessage" %)
162		-(((
163		-**tail -f /var/iot/station.log**
164		-)))
165		-
166		-[[image:image-20220623145437-2.png||height="501" width="694"]]
167		-
168	168