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	7	+**Table of Contents：**
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	9	+{{toc/}}
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12		-
13		-
14	14	= 1. Introduction =
15	15
16	16	== 1.1 ​What is NDS01 NB-IoT Door Sensor ==
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78	78	* Micro SIM card slot for NB-IoT SIM
79	79	* 2 x AAA LR03 Batteries
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	83	+
81	81	== 1.4  ​Applications ==
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83	83
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86	86	* Smart Cities
87	87	* Smart Factory
88	88
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	94	+
89	89	= 2. Use NDS01 to communicate with IoT Server =
90	90
91	91	== 2.1 How it works ==
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145	145	In the PC, use below serial tool settings:
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147	147	* Baud:  (% style="color:green" %)**9600**
	154	+
148	148	* Data bits:**  (% style="color:green" %)8(%%)**
	156	+
149	149	* Stop bits:  (% style="color:green" %)**1**
	158	+
150	150	* Parity:  (% style="color:green" %)**None**
	160	+
151	151	* Flow Control: (% style="color:green" %)**None**
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153	153	After powering on the NDS01, the following information will be printed
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244	244	* (% style="color:blue" %)**AT+PRO=1   **(%%) ~/~/ Set to use UDP protocol to uplink
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245	245	* (% style="color:blue" %)**AT+SERVADDR=119.91.62.30,1999   ** (%%) ~/~/ to set UDP server address and port
246	246
247	247	[[image:1668231759500-524.png]]
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254	254	* (% style="color:blue" %)**AT+PRO=0   ** (%%) ~/~/ Set to use TCP protocol to uplink
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255	255	* (% style="color:blue" %)**AT+SERVADDR=119.91.62.30,2002   **(%%) ~/~/ to set TCP server address and port
256	256
257	257	[[image:1668231789502-211.png]]
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343	343	Hum decimal
344	344	)))|(% style="width:38px" %)tail
345	345
346		-
347	347	The payload is ASCII string, representative same HEX: **0x (% style="color:red" %)4B57 (% style="color:blue" %)10 (% style="color:green" %)02 (% style="color:#00b0f0" %)14 (% style="color:#7030a0" %)01 (% style="color:#d60093" %)383639393735303334343431303832 (% style="color:#a14d07" %)01 (% style="color:#0020b0" %)00 (% style="color:#420042" %)20 (% style="color:#663300" %)15 (% style="color:#660066" %)1c (% style="color:#aaaa40" %)55 (% style="color:#abaa70" %)23 (% style="color:#ba5a70" %)12 (% style="color:purple" %)454F54 (%%)**
348	348
349	349	**where:**
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410	410
411	411	* (% style="color:#037691" %)**Tail:** (%%)0x494F54(fixed)
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	426	+
413	413	== 2.4 Node-Red Example ==
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483	483	(2) The heartbeat time is reported once every 24 hours by default.
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486	486	= 3. FAQ =
487	487
488	488	== 3.1 How to Upgrade Firmware ==