Wiki source code of Debug NB-IoT Connection
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| author | version | line-number | content |
|---|---|---|---|
| 1 | = For BC95-G = | ||
| 2 | |||
| 3 | ~1. Check the reason why you can't access the network: | ||
| 4 | |||
| 5 | 1) AT+CEREG=5 | ||
| 6 | |||
| 7 | 2) AT+CEREG? ~/~/This process may be longer, please repeat the input | ||
| 8 | |||
| 9 | 3) Mainly check the two parameters cause_type and reject_case | ||
| 10 | |||
| 11 | [[image:https://wiki.dragino.com/images/1/19/BC-95-G1.png||alt="BC-95-G1.png" height="366" width="558"]] | ||
| 12 | |||
| 13 | 2. Network access operation: | ||
| 14 | |||
| 15 | 1) AT+CFUN=0 | ||
| 16 | |||
| 17 | 2) AT+NBAND=X ~/~/X means the local frequency band number | ||
| 18 | |||
| 19 | 3) AT+NRB | ||
| 20 | |||
| 21 | 4) After waiting for a period of time, you can use AT+CSQ to query the network access | ||
| 22 | |||
| 23 | [[image:https://wiki.dragino.com/images/2/24/BC-95-G2.png||alt="BC-95-G2.png" height="365" width="558"]] | ||
| 24 | |||
| 25 | Remarks: | ||
| 26 | |||
| 27 | ~1. The operating voltage of the SIM card used must be less than 3.0V | ||
| 28 | |||
| 29 | 2. The network access time varies with the signal strength | ||
| 30 | |||
| 31 | 3. If you have not been able to access the network, please try to access the network manually |