Wiki source code of Debug NB-IoT Connection

Last modified by Xiaoling on 2024/08/19 16:09

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10.1	1	(% class="wikigeneratedid" %)
	2	Table of Contents:
	3
	4	{{toc/}}
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6.1	10	= For BC95-G =
1.1	11
7.4	12	----
7.1	13
7.4	14
10.1	15	== (% style="color:blue" %)1. Check the reason why you can't access the network(%%) ==
1.1	16
7.6	17	(% style="color:#037691" %)1) AT+CEREG=5
1.1	18
7.6	19	(% style="color:#037691" %)2) AT+CEREG? (%%) ~/~/ This process may be longer, please repeat the input
1.1	20
7.7	21	(% style="color:#037691" %)3) Mainly check the two parameters (% style="color:red" %)cause_type and reject_case
1.1	22
	23
6.1	24	[[image:image-20220530093747-3.png]]
1.1	25
6.1	26
10.1	27	== (% style="color:blue" %)2. Network access operation:(%%) ==
6.1	28
7.7	29	(% style="color:#037691" %)1) AT+CFUN=0
1.1	30
7.7	31	(% style="color:#037691" %)2) AT+NBAND=X (%%) ~/~/ X means the local frequency band number
1.1	32
7.7	33	(% style="color:#037691" %)3) AT+NRB
1.1	34
7.7	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
1.1	36
7.3	37
6.1	38	[[image:image-20220530093821-4.png]]
1.1	39
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7.2	41	(% style="color:blue" %)Remarks:
6.1	42
7.7	43	~1. The operating voltage of the SIM card used must be less than 3.0V.
1.1	44
7.7	45	2. The network access time varies with the signal strength.
1.1	46
7.7	47	3. If you have not been able to access the network, please try to access the network manually.
8.1	48
	49
10.1	50	== (% style="color:blue" %)3. Check the PS Attach or Detach (%%) ==
8.1	51
9.1	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
10.1	69	== (% style="color:blue" %)4. Check the signaling connection status:(%%) ==
9.1	70
8.1	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
10.1	85	== (% style="color:blue" %)5. Check the PDP Context Activate/Deactivate(%%) ==
8.1	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
10.1	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.

Wiki source code of Debug NB-IoT Connection

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