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1		-XWiki.Edwin
	1	+XWiki.ting

Content

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64	64	* STM32L072xxxx MCU
65	65	* SX1276/78 Wireless Chip
66	66	* Power Consumption:
	67	+** Idle: 4mA@12v
	68	+** 20dB Transmit: 34mA@12v
	69	+* Operating Temperature: -40 ~~ 85 Degree, No Dew
67	67
68		-* Idle: 4mA@12v
69		-* 20dB Transmit: [[34mA@12v>>mailto:34mA@12v]]
70		-
71		-
72	72	(% style="color:#037691" %)**Interface for Model: LT22222-L:**
73	73
74	74	* 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
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78	78	* 2 x 0~~30V Analog Input (res:0.01v)
79	79	* Power Input 7~~ 24V DC.
80	80
81		-
82	82	(% style="color:#037691" %)**LoRa Spec:**
83	83
	82	+* Frequency Range:
	83	+** Band 1 (HF): 862 ~~ 1020 Mhz
	84	+** Band 2 (LF): 410 ~~ 528 Mhz
	85	+* 168 dB maximum link budget.
	86	+* +20 dBm - 100 mW constant RF output vs.
	87	+* +14 dBm high efficiency PA.
	88	+* Programmable bit rate up to 300 kbps.
	89	+* High sensitivity: down to -148 dBm.
	90	+* Bullet-proof front end: IIP3 = -12.5 dBm.
	91	+* Excellent blocking immunity.
	92	+* Low RX current of 10.3 mA, 200 nA register retention.
	93	+* Fully integrated synthesizer with a resolution of 61 Hz.
	94	+* FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
	95	+* Built-in bit synchronizer for clock recovery.
	96	+* Preamble detection.
	97	+* 127 dB Dynamic Range RSSI.
	98	+* Automatic RF Sense and CAD with ultra-fast AFC.
	99	+* Packet engine up to 256 bytes with CRC.
84	84
85		-* (((
86		-(((
87		-Frequency Range:
88		-)))
89		-
90		-* (((
91		-Band 1 (HF): 862 ~~ 1020 Mhz
92		-)))
93		-* (((
94		-Band 2 (LF): 410 ~~ 528 Mhz
95		-)))
96		-)))
97		-* (((
98		-168 dB maximum link budget.
99		-)))
100		-* (((
101		-+20 dBm - 100 mW constant RF output vs.
102		-)))
103		-* (((
104		-+14 dBm high efficiency PA.
105		-)))
106		-* (((
107		-Programmable bit rate up to 300 kbps.
108		-)))
109		-* (((
110		-High sensitivity: down to -148 dBm.
111		-)))
112		-* (((
113		-Bullet-proof front end: IIP3 = -12.5 dBm.
114		-)))
115		-* (((
116		-Excellent blocking immunity.
117		-)))
118		-* (((
119		-Low RX current of 10.3 mA, 200 nA register retention.
120		-)))
121		-* (((
122		-Fully integrated synthesizer with a resolution of 61 Hz.
123		-)))
124		-* (((
125		-FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
126		-)))
127		-* (((
128		-Built-in bit synchronizer for clock recovery.
129		-)))
130		-* (((
131		-Preamble detection.
132		-)))
133		-* (((
134		-127 dB Dynamic Range RSSI.
135		-)))
136		-* (((
137		-Automatic RF Sense and CAD with ultra-fast AFC.
138		-)))
139		-* (((
140		-Packet engine up to 256 bytes with CRC.
141		-
142		-
143		-
144		-)))
145		-
146	146	== 1.3 Features ==
147	147
148		-
149	149	* LoRaWAN Class A & Class C protocol
150		-
151	151	* Optional Customized LoRa Protocol
152		-
153	153	* Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865/MA869
154		-
155	155	* AT Commands to change parameters
156		-
157	157	* Remote configure parameters via LoRa Downlink
158		-
159	159	* Firmware upgradable via program port
160		-
161	161	* Counting
162	162
163	163	== 1.4 Applications ==
164	164
165		-
166	166	* Smart Buildings & Home Automation
167		-
168	168	* Logistics and Supply Chain Management
169		-
170	170	* Smart Metering
171		-
172	172	* Smart Agriculture
173		-
174	174	* Smart Cities
175		-
176	176	* Smart Factory
177	177
178	178	== 1.5 Hardware Variants ==
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194	194
195	195	= 2. Power ON Device =
196	196
197		-
198		-(((
199	199	The LT controller can be powered by 7 ~~ 24V DC power source. Connect VIN to Power Input V+ and GND to power input V- to power the LT controller.
200		-)))
201	201
202		-(((
203	203	PWR will on when device is properly powered.
204	204
205		-
206		-)))
207		-
208	208	[[image:1653297104069-180.png]]
209	209
210	210
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1634	1634	(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
1635	1635	|(% style="background-color:#4f81bd; color:white; width:50px" %)**LEDs**|(% style="background-color:#4f81bd; color:white; width:460px" %)**Feature**
1636	1636	|**PWR**|Always on if there is power
1637		-|**SYS**|(((
1638		-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.
1639		-)))
1640	1640	|**TX**|(((
1641	1641	(((
1642	1642	Device boot: TX blinks 5 times.
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1651	1651	)))
1652	1652	)))
1653	1653	|**RX**|RX blinks once when receive a packet.
1654		-|**DO1**|
1655		-|**DO2**|
1656		-|**DO3**|
1657		-|**DI2**|(((
1658		-For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
	1586	+|**DO1**|For LT-22222-L: ON when DO1 is low, LOW when DO1 is high
	1587	+|**DO2**|For LT-22222-L: ON when DO2 is low, LOW when DO2 is high
	1588	+|**DI1**|(((
	1589	+For LT-22222-L: ON when DI1 is high, LOW when DI1 is low
1659	1659	)))
1660	1660	|**DI2**|(((
1661	1661	For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1662	1662	)))
1663		-|**DI2**|(((
1664		-For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1665		-)))
1666	1666	|**RO1**|
1667	1667	|**RO2**|
1668	1668