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Changes for page Debug NB-IoT Connection

Last modified by Xiaoling on 2024/08/19 16:09
From version 7.7
edited by Xiaoling
on 2023/04/21 11:45
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

Summary

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Content
... ... @@ -5,34 +5,36 @@
5 5  
6 6  (% style="color:blue" %)**1. Check the reason why you can't access the network:**
7 7  
8 -(% style="color:#037691" %)**1) AT+CEREG=5**
8 +1) AT+CEREG=5
9 9  
10 -(% style="color:#037691" %)**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
11 11  
12 -(% style="color:#037691" %)**3) Mainly check the two parameters **(% style="color:red" %)**cause_type and reject_case**
12 +3) Mainly check the two parameters cause_type and reject_case
13 13  
14 14  
15 15  [[image:image-20220530093747-3.png]]
16 16  
17 17  
18 +
18 18  (% style="color:blue" %)**2. Network access operation:**
19 19  
20 -(% style="color:#037691" %)**1) AT+CFUN=0**
21 +1) AT+CFUN=0
21 21  
22 -(% style="color:#037691" %)**2) AT+NBAND=X**  (%%) ~/~/  X means the local frequency band number
23 +2) AT+NBAND=X  ~/~/X means the local frequency band number
23 23  
24 -(% style="color:#037691" %)**3) AT+NRB**
25 +3) AT+NRB
25 25  
26 -(% style="color:#037691" %)**4) After waiting for a period of time, you can use **(% style="color:red" %)**AT+CSQ **(%%)**to query the network access**
27 +4) After waiting for a period of time, you can use AT+CSQ to query the network access
27 27  
28 28  
29 29  [[image:image-20220530093821-4.png]]
30 30  
31 31  
33 +
32 32  (% style="color:blue" %)**Remarks:**
33 33  
34 -~1. The operating voltage of the SIM card used must be less than 3.0V.
36 +~1. The operating voltage of the SIM card used must be less than 3.0V
35 35  
36 -2. The network access time varies with the signal strength.
38 +2. The network access time varies with the signal strength
37 37  
38 -3. If you have not been able to access the network, please try to access the network manually.
40 +3. If you have not been able to access the network, please try to access the network manually