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Changes for page Debug NB-IoT Connection

Last modified by Xiaoling on 2024/08/19 16:09
From version 5.1
edited by Xiaoling
on 2022/05/30 09:38
Change comment: Uploaded new attachment "image-20220530093821-4.png", version {1}
To version 10.1
edited by Xiaoling
on 2024/08/19 16:09
Change comment: There is no comment for this version

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Content
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1 -= For BC95-G =
1 +(% class="wikigeneratedid" %)
2 +**Table of Contents:**
2 2  
3 -~1. Check the reason why you can't access the network:
4 +{{toc/}}
4 4  
5 -1) AT+CEREG=5
6 6  
7 -2) AT+CEREG? ~/~/This process may be longer, please repeat the input
8 8  
9 -3) Mainly check the two parameters cause_type and reject_case
10 10  
11 -[[image:https://wiki.dragino.com/images/1/19/BC-95-G1.png||alt="BC-95-G1.png" height="366" width="558"]]
12 12  
13 -2. Network access operation:
10 += **For BC95-G** =
14 14  
15 -1) AT+CFUN=0
12 +----
16 16  
17 -2) AT+NBAND=X ~/~/X means the local frequency band number
18 18  
19 -3) AT+NRB
15 +== (% style="color:blue" %)**1. Check the reason why you can't access the network**(%%) ==
20 20  
21 -4) After waiting for a period of time, you can use AT+CSQ to query the network access
17 +(% style="color:#037691" %)**1) AT+CEREG=5**
22 22  
23 -[[image:https://wiki.dragino.com/images/2/24/BC-95-G2.png||alt="BC-95-G2.png" height="365" width="558"]]
19 +(% style="color:#037691" %)**2) AT+CEREG?**  (%%) ~/~/  This process may be longer, please repeat the input
24 24  
25 -Remarks:
21 +(% style="color:#037691" %)**3) Mainly check the two parameters **(% style="color:red" %)**cause_type and reject_case**
26 26  
27 -~1. The operating voltage of the SIM card used must be less than 3.0V
28 28  
29 -2. The network access time varies with the signal strength
24 +[[image:image-20220530093747-3.png]]
30 30  
31 -3. If you have not been able to access the network, please try to access the network manually
26 +
27 +== (% style="color:blue" %)**2. Network access operation:**(%%) ==
28 +
29 +(% style="color:#037691" %)**1) AT+CFUN=0**
30 +
31 +(% style="color:#037691" %)**2) AT+NBAND=X**  (%%) ~/~/  X means the local frequency band number
32 +
33 +(% style="color:#037691" %)**3) AT+NRB**
34 +
35 +(% style="color:#037691" %)**4) After waiting for a period of time, you can use **(% style="color:red" %)**AT+CSQ **(%%)**to query the network access**
36 +
37 +
38 +[[image:image-20220530093821-4.png]]
39 +
40 +
41 +(% style="color:blue" %)**Remarks:**
42 +
43 +~1. The operating voltage of the SIM card used must be less than 3.0V.
44 +
45 +2. The network access time varies with the signal strength.
46 +
47 +3. If you have not been able to access the network, please try to access the network manually.
48 +
49 +
50 +== (% style="color:blue" %)**3. Check the PS Attach or Detach  **(%%) ==
51 +
52 +(% style="color:#037691" %)**1) AT+CGATT?**
53 +
54 +(% style="color:#037691" %)**Response
55 ++CGATT: <state>
56 +OK**
57 +
58 +(% style="color:#037691" %)**Write Command
59 +AT+CGATT=<state>**
60 +
61 +(% style="color:#037691" %)**<state> Integer type. Indicates the state of PS attachment.
62 +0 Detached
63 +1 Attached**(%%)
64 +
65 +
66 +**Note:Generally, when registering with an operator, attaching GPRS is automatic, and CGATT can manually attach the network.**
67 +
68 +
69 +== (% style="color:blue" %)**4. Check the signaling connection status:**(%%) ==
70 +
71 +(% style="color:#037691" %)**1) AT+CSCON?**
72 +
73 +(% style="color:#037691" %)**Response
74 ++CSCON: <n>,<mode>
75 +OK**
76 +
77 +(% style="color:#037691" %)**<n> Enable/disable the URC. 
78 +0 Disable the URC
79 +1 Enable URC +CSCON: <mode> 
80 +<mode>Signaling connection status.
81 +0 Idle
82 +1 Connected**
83 +
84 +
85 +== (% style="color:blue" %)**5. Check the PDP Context Activate/Deactivate**(%%) ==
86 +
87 +(% style="color:#037691" %)**1) AT+CGACT?**
88 +
89 +(% style="color:#037691" %)**Response
90 +[+CGACT: <cid>,<state>]**
91 +
92 +(% style="color:#037691" %)**[+CGACT: <cid>,<state>]
93 +[…]
94 +OK**
95 +
96 +(% style="color:#037691" %)**<state> Integer type. The state of PDP context activation.
97 +0 Deactivated
98 +1 Activated
99 +<cid> Integer type. A numeric parameter which specifies a particular PDP context definition (see 
100 +AT+CGDCONT).**(%%)
101 +
102 +
103 +(% style="color:red" %)**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.**