Summary

• Page properties (2 modified, 0 added, 0 removed)

Details

Page properties

Author

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1		-XWiki.David
	1	+XWiki.Xiaoling

Content

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9	9
10	10	(% style="color:#037691" %)**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	+(% style="color:#037691" %)**3) Mainly check the two parameters (% style="color:red" %)cause_type and (% style="color:red" %)reject_case**
13	13
14	14
15	15	[[image:image-20220530093747-3.png]]
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17	17
18	18	(% style="color:blue" %)**2. Network access operation:**
19	19
20		-(% style="color:#037691" %)**1) AT+CFUN=0**
	20	+(% style="color:#037691" %)1) AT+CFUN=0
21	21
22		-(% style="color:#037691" %)**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
23	23
24		-(% style="color:#037691" %)**3) AT+NRB**
	24	+(% style="color:#037691" %)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**
	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	27
28	28
29	29	[[image:image-20220530093821-4.png]]
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31	31
32	32	(% style="color:blue" %)**Remarks:**
33	33
34		-~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
35	35
36		-2. The network access time varies with the signal strength.
	36	+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 signaling connection status:**
42		-
43		-(% style="color:#037691" %)**1) AT+CSCON?**
44		-
45		-(% style="color:#037691" %)**Response
46		-+CSCON: <n>,<mode>
47		-OK**
48		-
49		-(% style="color:#037691" %)**<n> Enable/disable the URC.
50		-0 Disable the URC
51		-1 Enable URC +CSCON: <mode>
52		-<mode>Signaling connection status.
53		-0 Idle
54		-1 Connected**
55		-
56		-
57		-(% style="color:blue" %)**4. Check the PDP Context Activate/Deactivate**
58		-
59		-(% style="color:#037691" %)**1) AT+CGACT?**
60		-
61		-(% style="color:#037691" %)**Response
62		-[+CGACT: <cid>,<state>]**
63		-
64		-(% style="color:#037691" %)**[+CGACT: <cid>,<state>]
65		-[…]
66		-OK**
67		-
68		-(% style="color:#037691" %)**<state> Integer type. The state of PDP context activation.
69		-0 Deactivated
70		-1 Activated
71		-<cid> Integer type. A numeric parameter which specifies a particular PDP context definition (see
72		-AT+CGDCONT).**(%%)
73		-
74		-
75		-
	38	+3. If you have not been able to access the network, please try to access the network manually