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1		-XWiki.Xiaoling
	1	+XWiki.Edwin

Content

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6	6	**Table of Contents:**
7	7
8	8	{{toc/}}
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55	55
56	56	== 1.2 Specifications ==
57	57
58		-(((
59		-
60		-
61	61	(% style="color:#037691" %)**Hardware System:**
62		-)))
63	63
64		-* (((
65		-STM32L072xxxx MCU
66		-)))
67		-* (((
68		-SX1276/78 Wireless Chip
69		-)))
70		-* (((
71		-(((
72		-Power Consumption:
73		-)))
	64	+* STM32L072xxxx MCU
	65	+* SX1276/78 Wireless Chip
	66	+* Power Consumption:
74	74
75		-* (((
76		-Idle: 4mA@12v
77		-)))
78		-* (((
79		-20dB Transmit: 34mA@12v
80		-)))
81		-)))
	68	+* Idle: 4mA@12v
	69	+* 20dB Transmit: [[34mA@12v>>mailto:34mA@12v]]
82	82
83		-(((
84		-
85	85
86	86	(% style="color:#037691" %)**Interface for Model: LT22222-L:**
87		-)))
88	88
89		-* (((
90		-2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
91		-)))
92		-* (((
93		-2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
94		-)))
95		-* (((
96		-2 x Relay Output (5A@250VAC / 30VDC)
97		-)))
98		-* (((
99		-2 x 0~~20mA Analog Input (res:0.01mA)
100		-)))
101		-* (((
102		-2 x 0~~30V Analog Input (res:0.01v)
103		-)))
104		-* (((
105		-Power Input 7~~ 24V DC.
106		-)))
	74	+* 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
	75	+* 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
	76	+* 2 x Relay Output (5A@250VAC / 30VDC)
	77	+* 2 x 0~~20mA Analog Input (res:0.01mA)
	78	+* 2 x 0~~30V Analog Input (res:0.01v)
	79	+* Power Input 7~~ 24V DC.
107	107
108		-(((
109		-
110	110
111	111	(% style="color:#037691" %)**LoRa Spec:**
112		-)))
113	113
	84	+
114	114	* (((
115	115	(((
116	116	Frequency Range:
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1155	1155	)))
1156	1156
1157	1157	(((
1158		-01: Close ,  00: Open , 11: No action
	1129	+00: Close ,  01: Open , 11: No action
1159	1159
1160	1160	(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:320px" %)
1161	1161	|(% style="background-color:#4f81bd; color:white" %)**Downlink Code**|(% style="background-color:#4f81bd; color:white" %)**RO1**|(% style="background-color:#4f81bd; color:white" %)**RO2**
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1586	1586	[[image:image-20240219115718-1.png]]
1587	1587
1588	1588
1589		-
1590	1590	=== 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1591	1591
1592	1592
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1661	1661	== 3.7 LEDs Indicators ==
1662	1662
1663	1663
1664		-(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
1665		-|(% style="background-color:#4f81bd; color:white; width:50px" %)**LEDs**|(% style="background-color:#4f81bd; color:white; width:470px" %)**Feature**
	1634	+(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
	1635	+|(% style="background-color:#4f81bd; color:white; width:50px" %)**LEDs**|(% style="background-color:#4f81bd; color:white; width:460px" %)**Feature**
1666	1666	|**PWR**|Always on if there is power
1667	1667	|**SYS**|(((
1668	1668	After device is powered on, the SYS will **fast blink in GREEN** for 5 times, means RS485-LN start to join LoRaWAN network. If join success, SYS will be **on GREEN for 5 seconds. **SYS will **blink Blue** on every upload and **blink Green** once receive a downlink message.
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1705	1705	LT supports AT Command set. User can use a USB to TTL adapter plus the 3.5mm Program Cable to connect to LT for using AT command, as below.
1706	1706	)))
1707	1707
1708		-(((
1709		-
1710		-)))
1711		-
1712	1712	[[image:1653358238933-385.png]]
1713	1713
1714	1714