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214		-=== 2.2.3 Connect USB – TTL to NDDS75 to configure it ===
	214	+=== 2.2.4  Connect USB – TTL to N95S31B to configure it ===
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216	216	(((
217	217	(((
218		-User need to configure NDDS75 via serial port to set the (% style="color:blue" %)**Server Address** / **Uplink Topic** (%%)to define where and how-to uplink packets. NDDS75 support AT Commands, user can use a USB to TTL adapter to connect to NDDS75 and use AT Commands to configure it, as below.
	218	+User need to configure N95S31B via serial port to set the (% style="color:blue" %)**Server Address** / **Uplink Topic** (%%)to define where and how-to uplink packets. N95S31B support AT Commands, user can use a USB to TTL adapter to connect to N95S31B and use AT Commands to configure it, as below.
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222		-[[image:image-20220709092052-2.png]]
	222	+[[image:1657351312545-300.png]]
223	223
224	224	**Connection:**
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239	239	* Flow Control: (% style="color:green" %)**None**
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241	241	(((
242		-Make sure the switch is in FLASH position, then power on device by connecting the jumper on NDDS75. NDDS75 will output system info once power on as below, we can enter the (% style="color:green" %)**password: 12345678**(%%) to access AT Command input.
	242	+Make sure the switch is in FLASH position, then power on device by connecting the jumper on N95S31B. N95S31B will output system info once power on as below, we can enter the (% style="color:green" %)**password: 12345678**(%%) to access AT Command input.
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245	245	[[image:1657329814315-101.png]]
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247	247	(((
248		-(% style="color:red" %)Note: the valid AT Commands can be found at: (%%)[[https:~~/~~/www.dragino.com/downloads/index.php?dir=NB-IoT/NDDS75/>>url:https://www.dragino.com/downloads/index.php?dir=NB-IoT/NDDS75/]]
	248	+(% style="color:red" %)Note: the valid AT Commands can be found at:  (%%)[[https:~~/~~/www.dragino.com/downloads/index.php?dir=NB-IoT/N95S31B/>>url:https://www.dragino.com/downloads/index.php?dir=NB-IoT/N95S31B/]]
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253		-=== 2.2.4 Use CoAP protocol to uplink data ===
	253	+=== 2.2.5  Use CoAP protocol to uplink data ===
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255	255	(% style="color:red" %)Note: if you don't have CoAP server, you can refer this link to set up one: (%%)[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Set%20up%20CoAP%20Server/>>http://wiki.dragino.com/xwiki/bin/view/Main/Set%20up%20CoAP%20Server/]]
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270	270	)))
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273	273	For parameter description, please refer to AT command set
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276		-[[image:1657330452568-615.png]]
	278	+[[image:1657352146020-183.png]]
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280	280	After configure the server address and (% style="color:green" %)**reset the device**(%%) (via AT+ATZ ), NDDS75 will start to uplink sensor values to CoAP server.
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283		-[[image:1657330472797-498.png]]
	285	+[[image:1657352185396-303.png]]
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287		-=== 2.2.5 Use UDP protocol to uplink data(Default protocol) ===
	289	+=== 2.2.6  Use UDP protocol to uplink data(Default protocol) ===
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290	290	* (% style="color:blue" %)**AT+PRO=2   ** (%%) ~/~/ Set to use UDP protocol to uplink

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