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Changes for page Debug NB-IoT Connection

Last modified by Xiaoling on 2024/08/19 16:09
From version 9.1
edited by David Huang
on 2023/09/28 16:17
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

Details

Page properties
Author
... ... @@ -1,1 +1,1 @@
1 -XWiki.David
1 +XWiki.Xiaoling
Content
... ... @@ -5,90 +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.
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.**
40 +3. If you have not been able to access the network, please try to access the network manually