Wiki source code of Debug NB-IoT Connection
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1.2 | 1 | = For BC95-G = |
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1.1 | 2 | |
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1.2 | 3 | ~1. Check the reason why you can't access the network: |
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1.1 | 4 | |
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1.2 | 5 | 1) AT+CEREG=5 |
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1.1 | 6 | |
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1.2 | 7 | 2) AT+CEREG? ~/~/This process may be longer, please repeat the input |
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1.1 | 8 | |
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1.2 | 9 | 3) Mainly check the two parameters cause_type and reject_case |
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1.1 | 10 | |
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1.2 | 11 | [[image:https://wiki.dragino.com/images/1/19/BC-95-G1.png||alt="BC-95-G1.png" height="366" width="558"]] |
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1.1 | 12 | |
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1.2 | 13 | 2. Network access operation: |
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1.1 | 14 | |
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1.2 | 15 | 1) AT+CFUN=0 |
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1.1 | 16 | |
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1.2 | 17 | 2) AT+NBAND=X ~/~/X means the local frequency band number |
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1.1 | 18 | |
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1.2 | 19 | 3) AT+NRB |
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1.1 | 20 | |
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1.2 | 21 | 4) After waiting for a period of time, you can use AT+CSQ to query the network access |
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1.1 | 22 | |
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1.2 | 23 | [[image:https://wiki.dragino.com/images/2/24/BC-95-G2.png||alt="BC-95-G2.png" height="365" width="558"]] |
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1.1 | 24 | |
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1.2 | 25 | Remarks: |
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1.1 | 26 | |
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1.2 | 27 | ~1. The operating voltage of the SIM card used must be less than 3.0V |
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1.1 | 28 | |
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1.2 | 29 | 2. The network access time varies with the signal strength |
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1.1 | 30 | |
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1.2 | 31 | 3. If you have not been able to access the network, please try to access the network manually |