Summary

• Page properties (1 modified, 0 added, 0 removed)

Details

Page properties

Content

...	...	@@ -5,11 +5,11 @@
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 (% style="color:red" %)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]]
...	...	@@ -17,13 +17,13 @@
17	17
18	18	(% style="color:blue" %)**2. Network access operation:**
19	19
20		-(% style="color:#037691" %)1) AT+CFUN=0
	20	+1) AT+CFUN=0
21	21
22		-(% style="color:#037691" %)2) AT+NBAND=X  (%%) ~/~/  X means the local frequency band number
	22	+2) AT+NBAND=X  ~/~/  X means the local frequency band number
23	23
24		-(% style="color:#037691" %)3) AT+NRB
	24	+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	+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]]