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1		-XWiki.Kilight
	1	+XWiki.Xiaoling

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1		-= Overview: =
	1	+(% class="wikigeneratedid" %)
	2	+**Table of Contents:**
2	2
	4	+{{toc/}}
	5	+
	6	+
	7	+
	8	+
	9	+= 1.  Overview =
	10	+
	11	+
	12	+(((
3	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.
	14	+)))
4	4
5	5
6		-= Change Power for Semtech UDP Paket forward connection =
	17	+= 2.  Change Power for Semtech UDP Paket forward connection =
7	7
8		-----
9	9
	20	+(((
10	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.
	22	+)))
11	11
	24	+(((
12	12	Gateway maintains a power index in the file: /etc/lora/global_conf.json for example:
	26	+)))
13	13
14	14
15	15	(% class="box" %)
...	...	@@ -16,7 +16,7 @@
16	16	(((
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		- "pa_gain": 2,                            ~/~/ to the value mentioned here so to generate 15dB output power.
	33	+ "pa_gain": 2,  ~/~/ to the value mentioned here so to generate 15dB output power.
20	20	"mix_gain": 10,
21	21	"rf_power": 15,
22	22	"dig_gain": 1
...	...	@@ -29,25 +29,33 @@
29	29	"dig_gain": 0
30	30	)))
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.
33	33
	47	+(((
	48	+(% style="color:red" %)**Note: If when lorawan server specifies a rf_power that is not listed above. gateway will choose the closest power. profile.**
	49	+)))
34	34
	51	+
	52	+(((
35	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.
	54	+)))
36	36
	56	+(((
37	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.
	58	+)))
38	38
	60	+(((
39	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
	62	+)))
40	40
41	41
42		-= Change Power for LoRaWAN Basic Station connection =
	65	+= 3.  Change Power for LoRaWAN Basic Station connection =
43	43
44		-----
45	45
46	46	First, you need to find out what is the chip module of the gateway?
47	47
48	48	(% class="box infomessage" %)
49	49	(((
50		-cat /var/iot/chip
	72	+**cat /var/iot/chip **
51	51	)))
52	52
53	53	[[image:image-20220623140335-1.png||height="241" width="378"]]
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55	55	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]].
56	56
57	57
58		-**SX1301 Change Power for LoRaWAN Basic Station Connection example:**
	80	+(% style="color:blue" %)**SX1301 Change Power for LoRaWAN Basic Station Connection example:**
59	59
60		-Gateway maintains a power index in the file: /etc/station/station-sx1301.conf for example:
	82	+Gateway maintains a power index in the file: /etc/station/station-sx1301.conf
61	61
62	62	(% class="box" %)
63	63	(((
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87	87	},
88	88	)))
89	89
90		-**Add parameters:"tx_gain_lut"  :  [ TX_GAIN_LUT, .. ]**
91	91
	113	+Add parameters:**"(% style="color:blue" %)tx_gain_lut": [ TX_GAIN_LUT, .. ](%%)**
	114	+
92	92	(% class="box" %)
93	93	(((
94	94	{
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100	100	"device": "/dev/spidev1.0",
101	101	/* freq/enable provided by LNS - only HW specific settings listed here */
102	102	"tx_gain_lut":[
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
	126	+ {"rf_power": 12, "pa_gain": 2, "mix_gain": 11, "dig_gain": 2, "dac_gain": 3},
104	104	{"rf_power": 13, "pa_gain": 2, "mix_gain": 10, "dig_gain": 0, "dac_gain": 3},
105	105	{"rf_power": 14, "pa_gain": 2, "mix_gain": 12, "dig_gain": 2, "dac_gain": 3},
106	106	{"rf_power": 15, "pa_gain": 2, "mix_gain": 13, "dig_gain": 2, "dac_gain": 3},
	130	+
	131	+/* Index 3 refer to rf_power: 15dB. device will set the pa_gain,mix_gain,dig_gain */
	132	+
	133	+/* to the value mentioned here so as to generate 15dB output power.*/
107	107	{"rf_power": 16, "pa_gain": 2, "mix_gain": 13, "dig_gain": 1, "dac_gain": 3},
108	108	{"rf_power": 17, "pa_gain": 2, "mix_gain": 14, "dig_gain": 1, "dac_gain": 3},
109	109	{"rf_power": 18, "pa_gain": 2, "mix_gain": 15, "dig_gain": 2, "dac_gain": 3},
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132	132	},
133	133	)))
134	134
	162	+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]]
	163	+
	164	+
135	135	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.
136	136
	167	+(% style="color:red" %)**Note: When the Settings are complete, click "Save&Apply" on the gateway's Web UI**
	168	+
	169	+
	170	+= 4.  Checking station Logs =
	171	+
	172	+
	173	+Run the command:
	174	+
	175	+(% class="box infomessage" %)
	176	+(((
	177	+**tail -f /var/iot/station.log**
	178	+)))
	179	+
	180	+[[image:image-20220623145437-2.png||height="501" width="694"]]
	181	+
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