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Author

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1		-XWiki.kai
	1	+XWiki.Xiaoling

Content

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100	100	(% style="color:blue" %)**5. When you click to create things, the certificate download page will pop up**
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103		-**This certificate is very important.** After creating the device, you must download the certificate of the device so that our NB device can connect normally.
	103	+**This certificate is very important.**(%%) After creating the device, you must download the certificate of the device so that our NB device can connect normally.
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105	105	Please download all the following certificates and put them in a folder.
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135	135
136	136	=== 4.1.2 Configure certificate ===
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138		-(% 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)
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140		-[[image:image-20240814155410-1.png||height="328" width="563"]]
141		-
142	142	After upgrade the firmware, the serial port displays as follows：
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144	144	[[image:image-20240528174330-13.png||height="286" width="568"]]
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347	347	* Update through UART TTL interface : **[[Instruction>>url:http://wiki.dragino.com/xwiki/bin/view/Main/UART_Access_for_NB_ST_BC660K-GL/#H4.2UpdateFirmware28Assumethedevicealreadyhaveabootloader29]]**.
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	346	+
	347	+
349	349	=== 4.2.2 Configure certificate ===
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357	357	==== 4.2.2.1 Configure CA certificate ====
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359		-(% style="color:red" %)**Note:You should select one of the certificates.Either CA1 or CA3 can be used**
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361	361	Please input the certificate in PEM format for the user.
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543	543	(% style="color:blue" %)**AT+DELCLICERT}**
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545		-(% style="color:blue" %)**AT+DELCACERT}**(%%)
546		-(% style="color:blue" %)
	543	+(% style="color:blue" %)**AT+DELCACERT}**
	544	+
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548	548	(% style="color:red" %)**Note: 1.When there is no certificate on the device, a deletion error will be displayed.
549	549	2.When the device already has a certificate, using the command to configure the certificate again will display a configuration error.**

image-20240814155410-1.png

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1		-XWiki.kai

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