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...	...	@@ -27,38 +27,30 @@
27	27
28	28	a. Fill in any name
29	29
30		-b. Configure the policy you created
31	31
32		-[[image:image-20240528173144-3.png||height="572" width="931"]]
	31	+b. Fill in * to Policy action and Policy resource (* stands for all)
33	33
	33	+[[image:image-20250103152135-2.png||height="777" width="1544"]]
34	34
	35	+
35	35	c. After clicking to enter the policy configuration page, follow the clicking sequence below to go to the json configuration interface, and then fill in the following fields in the "statement" keyword:
36	36
37	37
38		-**{**
	39	+**{
	40	+ "Version": "2012-10-17",
	41	+ "Statement": [
	42	+ {
	43	+ "Effect": "Allow",
	44	+ "Action": "iot:*",
	45	+ "Resource": "*"
	46	+ }
	47	+ ]
	48	+}**
39	39
40		-**~ "Version": "2012-10-17",**
41	41
42		-**~ "Statement": [**
43	43
44		-**~ {**
	52	+[[image:image-20250103151957-1.png||height="529" width="935"]]
45	45
46		-**~ "Effect": "Allow",**
47		-
48		-**~ "Action": "",**
49		-
50		-**~ "Resource": ""**
51		-
52		-**~ }**
53		-
54		-**~ ]**
55		-
56		-**}**
57		-
58		-
59		-[[image:image-20240528173203-4.png||height="517" width="942"]]
60		-
61		-
62	62	d. Create this policy
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117	117
118	118	(% id="cke_bm_37736S" style="color:red; display:none" %)** **(% style="color:red" %)**Note: **(%%)In order to avoid problems with certificate writing, you need to set the serial port assistant to automatically add a newline character when sending commands, if there is no such newline character, the certificate written will be invalid.(Using the serial port assistant as an example)
119	119
120		-[[image:image-20240814155410-1.png||height="328" width="563"]]
	112	+[[image:image-20240822090554-1.png||height="501" width="656"]]
121	121
122	122
123	123	== 4.1 For -NB /-NS model ==
124	124
125		-=== 4.1.1 Upgrade the firmware to configure TTS firmware to set the certificate ===
	117	+=== 4.1.1 Upgrade the firmware to configure TLS firmware to set the certificate ===
126	126
127	127
128	128	User can change device firmware to::
...	...	@@ -327,12 +327,12 @@
327	327	==== 4.1.2.4 Re-upgrade the firmware ====
328	328
329	329
330		-After the certificate configuration is completed, Re-upgrade to the firmware you originally used.
	322	+After completing the certificate configuration, Burn the [[bootloader>>https://www.dropbox.com/sh/u0uzvvnn58yrie4/AAAvvF_KRveNgmDejzp23ziLa/NB-IoT/Bootloader?dl=0&subfolder_nav_tracking=1]] firmware first, then re-burn the original working [[firmware>>https://www.dropbox.com/sh/u0uzvvnn58yrie4/AACREHllkTe0rATD4ZOqddyga/NB-IoT?dl=0]].
331	331
332	332
333	333	== 4.2  For -CB /-CS model ==
334	334
335		-=== 4.2.1 Upgrade the firmware to configure TTS firmware to set the certificate ===
	327	+=== 4.2.1 Upgrade the firmware to configure TLS firmware to set the certificate ===
336	336
337	337
338	338	User can change device firmware to::

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