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Author

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1		-XWiki.Xiaoling
	1	+XWiki.Edwin

Content

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45	45	|(% style="width:134px" %)**AS923**|(% style="width:400px" %)14dBm|(% style="width:362px" %)SF=12|(% style="width:102px" %)125Khz
46	46
47	47
48		-
49	49	== 2.2  Adaptive Data Rate (ADR) and set max distance ==
50	50
51	51
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86	86
87	87	Below are the settings for longest distance transmission. ( will reduce battery life)
88	88
89		-* (% style="color:#037691" %)AT+ADR=0     (%%)~/~/  Disable ADR
90		-* (% style="color:#037691" %)AT+DR=  0     (%%)~/~/  Use the smallest DR
91		-* (% style="color:#037691" %)AT+TXP=0    (%%) ~/~/  Use max power.
	88	+* (% style="color:#037691" %)**AT+ADR=0**     (%%)~/~/  Disable ADR
	89	+* (% style="color:#037691" %)**AT+DR=  0**     (%%)~/~/  Use the smallest DR
	90	+* (% style="color:#037691" %)**AT+TXP=0**    (%%) ~/~/  Use max power.
92	92
93	93
	93	+= 3.  Analyze at the hardware side =
94	94
95		-= 3.  Installation Guidelines =
	95	+== 3.1  Check if the antenna path is good ~-~- For LSn50v2 series end node ==
96	96
97		-== 3.1  Check the use environment ==
	97	+a) Open Enclosure and Check if the antenna connection to module is good.
98	98
	99	+b) check if the connector match.
99	99
	101	+[[image:image-20221016081725-1.png||height="426" width="706"]]
	102	+
	103	+
	104	+= 4.  Installation Guidelines =
	105	+
	106	+== 4.1  Check the use environment ==
	107	+
	108	+
100	100	First , User should notice: Radio link quality and performances are highly dependent of the environment.
101	101
102	102	(% style="color:blue" %)**Better performances can be reached with:**
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107	107	* At least 1 meter above the ground.
108	108
109	109
110		-
111	111	(% style="color:blue" %)**Radio performances are degraded with:**
112	112
113	113	* Obstacles: buildings, trees...
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116	116	* Radio communication are usually killed with bad topographic conditions. It is usually not possible to communicate through a hill, even very small.
117	117
118	118
	127	+== 4.2  Improve the Antenna ==
119	119
120		-== 3.2  Improve the Antenna ==
121	121
122		-
123	123	In some case, we have to install the device inside the chamber or next to a metal case. So the signal between the antenna and the receiver (gateway) is blocked by the metal. This will greatly reduce the signal. In such case, we can consider using antenna extend cable to extend the antenna to a better position.
124	124
125	125
126	126
127		-= 4.  Some real-world case =
	134	+= 5.  Some real-world case =
128	128
129		-== 4.1  Server reason cause end node has problem on Join. ==
	136	+== 5.1  Server reason cause end node has problem on Join. ==
130	130
131	131
132	132	In one case, the customer is using AWS IoT Core and gateway to connect to AWS via Basic Station Connection, Frequency Band is AU915 sub-band 2. For some unknown reason, AWS always set downlink power to 0dBm, which cause the gateway only emit a very low power and lead to a short distance for sensor.

image-20221016081725-1.png

Author

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	1	+XWiki.Edwin

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	1	+569.8 KB

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