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| author | version | line-number | content |
|---|---|---|---|
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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. |
| 2 | |||
| 3 | Below is the definition for the AT+CSQ | ||
| 4 | |||
| 5 | [[image:https://wiki.dragino.com/images/thumb/5/5d/NB-IoT-CSQ_11.png/600px-NB-IoT-CSQ_11.png||height="644" width="600"]] | ||
| 6 | |||
| 7 | CSQ Definition | ||
| 8 | |||
| 9 | In this case, you can check: | ||
| 10 | |||
| 11 | * Whether the antenna connection is good. | ||
| 12 | * Whether you use a valid SIM Card | ||
| 13 | * Whether you the SIM card place correctly. | ||
| 14 | * Whether the NB-IoT Network you use match the End Device Module support network. | ||
| 15 | * Whether you have select the correct band for your operator. See [[Specify_NB-IoT_Band>>url:https://wiki.dragino.com/index.php/Specify_NB-IoT_Band]] |