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Last modified by Xiaoling on 2024/08/16 11:25
From version 9.1
edited by Edwin Chen
on 2022/10/06 19:11
Change comment: There is no comment for this version
To version 10.1
edited by Edwin Chen
on 2022/10/06 19:14
Change comment: There is no comment for this version

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72 72  
73 73  
74 74  
75 +== Best software settings for the longest distance ==
76 +
77 +Below are the settings for longest distance transmission. ( will reduce battery life)
78 +
79 +* AT+ADR=0 ~/~/ Disable ADR
80 +* AT+DR=0 ~/~/ Use the smallest DR
81 +* AT+TXP=0 ~/~/ Use max power.
82 +
83 +
84 +
75 75  = Installation Guidelines =
76 76  
77 77  == Check the use environment ==
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85 85  * No high level radio interferes in the ISM band you use.
86 86  * At least 1 meter above the ground.
87 87  
88 -
89 89  Radio performances are degraded with:
90 90  
91 91  * Obstacles: buildings, trees...
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93 93  * High ISM band usage by other technologies.
94 94  * Radio communication are usually killed with bad topographic conditions. It is usually not possible to communicate through a hill, even very small.
95 95  
96 -
97 97  == Improve the Antenna ==
98 98  
99 99  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.