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Changes for page Debug NB-IoT Connection

Last modified by Xiaoling on 2024/08/19 16:09
From version 6.1
edited by Xiaoling
on 2022/05/30 09:38
Change comment: There is no comment for this version
To version 7.4
edited by Xiaoling
on 2022/07/22 17:01
Change comment: There is no comment for this version

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1 1  = **For BC95-G** =
2 2  
3 -**~1. Check the reason why you can't access the network:**
3 +----
4 4  
5 +
6 +(% style="color:blue" %)**1. Check the reason why you can't access the network:**
7 +
5 5  1) AT+CEREG=5
6 6  
7 -2) AT+CEREG? ~/~/This process may be longer, please repeat the input
10 +2) AT+CEREG?  ~/~/This process may be longer, please repeat the input
8 8  
9 9  3) Mainly check the two parameters cause_type and reject_case
10 10  
... ... @@ -12,21 +12,24 @@
12 12  [[image:image-20220530093747-3.png]]
13 13  
14 14  
15 -**2. Network access operation:**
16 16  
19 +(% style="color:blue" %)**2. Network access operation:**
20 +
17 17  1) AT+CFUN=0
18 18  
19 -2) AT+NBAND=X ~/~/X means the local frequency band number
23 +2) AT+NBAND=X  ~/~/X means the local frequency band number
20 20  
21 21  3) AT+NRB
22 22  
23 23  4) After waiting for a period of time, you can use AT+CSQ to query the network access
24 24  
29 +
25 25  [[image:image-20220530093821-4.png]]
26 26  
27 27  
28 -**Remarks:**
29 29  
34 +(% style="color:blue" %)**Remarks:**
35 +
30 30  ~1. The operating voltage of the SIM card used must be less than 3.0V
31 31  
32 32  2. The network access time varies with the signal strength