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1.3 | 1 | When you use NB-IoT module and run the command AT+CSG=99,99. It means the device doesn't attached to the NB-IoT network. If attached to network, the first 99 should be 2~~31. |
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1.4 | 3 | ((( |
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2.2 | 4 | Below is the definition for the **AT+CSQ** |
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1.4 | 5 | ))) |
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1.3 | 6 | |
| 7 | [[image:https://wiki.dragino.com/images/thumb/5/5d/NB-IoT-CSQ_11.png/600px-NB-IoT-CSQ_11.png||height="644" width="600"]] | ||
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| 9 | CSQ Definition | ||
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| 11 | In this case, you can check: | ||
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| 13 | * Whether the antenna connection is good. | ||
| 14 | * Whether you use a valid SIM Card | ||
| 15 | * Whether you the SIM card place correctly. | ||
| 16 | * Whether the NB-IoT Network you use match the End Device Module support network. | ||
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2.1 | 17 | * Whether you have select the correct band for your operator. See [[Specify_NB-IoT_Band>>http://8.211.40.43:8080/xwiki/bin/view/Main/Specify%20NB-IoT%20Band/]] |