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Changes for page Debug NB-IoT Connection

Last modified by Xiaoling on 2024/08/19 16:09
From version 7.2
edited by Xiaoling
on 2022/07/22 16:59
Change comment: There is no comment for this version
To version 9.1
edited by David Huang
on 2023/09/28 16:17
Change comment: There is no comment for this version

Summary

Details

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Author
... ... @@ -1,1 +1,1 @@
1 -XWiki.Xiaoling
1 +XWiki.David
Content
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1 1  = **For BC95-G** =
2 2  
3 +----
3 3  
5 +
4 4  (% style="color:blue" %)**1. Check the reason why you can't access the network:**
5 5  
6 -1) AT+CEREG=5
8 +(% style="color:#037691" %)**1) AT+CEREG=5**
7 7  
8 -2) AT+CEREG? ~/~/This process may be longer, please repeat the input
10 +(% style="color:#037691" %)**2) AT+CEREG?**  (%%) ~/~/  This process may be longer, please repeat the input
9 9  
10 -3) Mainly check the two parameters cause_type and reject_case
12 +(% style="color:#037691" %)**3) Mainly check the two parameters **(% style="color:red" %)**cause_type and reject_case**
11 11  
12 12  
13 13  [[image:image-20220530093747-3.png]]
... ... @@ -15,21 +15,78 @@
15 15  
16 16  (% style="color:blue" %)**2. Network access operation:**
17 17  
18 -1) AT+CFUN=0
20 +(% style="color:#037691" %)**1) AT+CFUN=0**
19 19  
20 -2) AT+NBAND=X ~/~/X means the local frequency band number
22 +(% style="color:#037691" %)**2) AT+NBAND=X**  (%%) ~/~/  X means the local frequency band number
21 21  
22 -3) AT+NRB
24 +(% style="color:#037691" %)**3) AT+NRB**
23 23  
24 -4) After waiting for a period of time, you can use AT+CSQ to query the network access
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**
25 25  
28 +
26 26  [[image:image-20220530093821-4.png]]
27 27  
28 28  
29 29  (% style="color:blue" %)**Remarks:**
30 30  
31 -~1. The operating voltage of the SIM card used must be less than 3.0V
34 +~1. The operating voltage of the SIM card used must be less than 3.0V.
32 32  
33 -2. The network access time varies with the signal strength
36 +2. The network access time varies with the signal strength.
34 34  
35 -3. If you have not been able to access the network, please try to access the network manually
38 +3. If you have not been able to access the network, please try to access the network manually.
39 +
40 +
41 +(% style="color:blue" %)**3. Check the PS Attach or Detach  **
42 +
43 +(% style="color:#037691" %)**1) AT+CGATT?**
44 +
45 +(% style="color:#037691" %)**Response
46 ++CGATT: <state>
47 +OK**
48 +
49 +(% style="color:#037691" %)**Write Command
50 +AT+CGATT=<state>**
51 +
52 +(% style="color:#037691" %)**<state> Integer type. Indicates the state of PS attachment.
53 +0 Detached
54 +1 Attached**(%%)
55 +
56 +
57 +**Note:Generally, when registering with an operator, attaching GPRS is automatic, and CGATT can manually attach the network.**
58 +
59 +
60 +(% style="color:blue" %)**4. Check the signaling connection status:**
61 +
62 +(% style="color:#037691" %)**1) AT+CSCON?**
63 +
64 +(% style="color:#037691" %)**Response
65 ++CSCON: <n>,<mode>
66 +OK**
67 +
68 +(% style="color:#037691" %)**<n> Enable/disable the URC. 
69 +0 Disable the URC
70 +1 Enable URC +CSCON: <mode> 
71 +<mode>Signaling connection status.
72 +0 Idle
73 +1 Connected**
74 +
75 +
76 +(% style="color:blue" %)**5. Check the PDP Context Activate/Deactivate**
77 +
78 +(% style="color:#037691" %)**1) AT+CGACT?**
79 +
80 +(% style="color:#037691" %)**Response
81 +[+CGACT: <cid>,<state>]**
82 +
83 +(% style="color:#037691" %)**[+CGACT: <cid>,<state>]
84 +[…]
85 +OK**
86 +
87 +(% style="color:#037691" %)**<state> Integer type. The state of PDP context activation.
88 +0 Deactivated
89 +1 Activated
90 +<cid> Integer type. A numeric parameter which specifies a particular PDP context definition (see 
91 +AT+CGDCONT).**(%%)
92 +
93 +
94 +**Note:Note that having a cell ID attached to the network does not necessarily mean successful activation. For data exchange, such as initiating HTTP requests, activation is necessary to use them.**