Last modified by Saxer Lin on 2025/04/15 17:24
<
From version < 137.1 >
edited by Mengting Qiu
on 2024/09/12 08:51
To version < 132.1 >
edited by Mengting Qiu
on 2024/03/04 15:05
>
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... ... @@ -59,62 +59,153 @@
59 59  
60 60  == 1.2 Specifications ==
61 61  
62 +(((
63 +
64 +
62 62  (% style="color:#037691" %)**Hardware System:**
66 +)))
63 63  
64 -* STM32L072xxxx MCU
65 -* SX1276/78 Wireless Chip 
66 -* Power Consumption:
67 -** Idle: 4mA@12v
68 -** 20dB Transmit: 34mA@12v
69 -* Operating Temperature: -40 ~~ 85 Degree, No Dew
68 +* (((
69 +STM32L072xxxx MCU
70 +)))
71 +* (((
72 +SX1276/78 Wireless Chip 
73 +)))
74 +* (((
75 +(((
76 +Power Consumption:
77 +)))
70 70  
79 +* (((
80 +Idle: 4mA@12v
81 +)))
82 +* (((
83 +20dB Transmit: 34mA@12v
84 +)))
85 +)))
86 +
87 +(((
88 +
89 +
71 71  (% style="color:#037691" %)**Interface for Model: LT22222-L:**
91 +)))
72 72  
73 -* 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
74 -* 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
75 -* 2 x Relay Output (5A@250VAC / 30VDC)
76 -* 2 x 0~~20mA Analog Input (res:0.01mA)
77 -* 2 x 0~~30V Analog Input (res:0.01v)
78 -* Power Input 7~~ 24V DC. 
93 +* (((
94 +2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
95 +)))
96 +* (((
97 +2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
98 +)))
99 +* (((
100 +2 x Relay Output (5A@250VAC / 30VDC)
101 +)))
102 +* (((
103 +2 x 0~~20mA Analog Input (res:0.01mA)
104 +)))
105 +* (((
106 +2 x 0~~30V Analog Input (res:0.01v)
107 +)))
108 +* (((
109 +Power Input 7~~ 24V DC. 
110 +)))
79 79  
112 +(((
113 +
114 +
80 80  (% style="color:#037691" %)**LoRa Spec:**
116 +)))
81 81  
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.
118 +* (((
119 +(((
120 +Frequency Range:
121 +)))
100 100  
123 +* (((
124 +Band 1 (HF): 862 ~~ 1020 Mhz
125 +)))
126 +* (((
127 +Band 2 (LF): 410 ~~ 528 Mhz
128 +)))
129 +)))
130 +* (((
131 +168 dB maximum link budget.
132 +)))
133 +* (((
134 ++20 dBm - 100 mW constant RF output vs.
135 +)))
136 +* (((
137 ++14 dBm high efficiency PA.
138 +)))
139 +* (((
140 +Programmable bit rate up to 300 kbps.
141 +)))
142 +* (((
143 +High sensitivity: down to -148 dBm.
144 +)))
145 +* (((
146 +Bullet-proof front end: IIP3 = -12.5 dBm.
147 +)))
148 +* (((
149 +Excellent blocking immunity.
150 +)))
151 +* (((
152 +Low RX current of 10.3 mA, 200 nA register retention.
153 +)))
154 +* (((
155 +Fully integrated synthesizer with a resolution of 61 Hz.
156 +)))
157 +* (((
158 +FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
159 +)))
160 +* (((
161 +Built-in bit synchronizer for clock recovery.
162 +)))
163 +* (((
164 +Preamble detection.
165 +)))
166 +* (((
167 +127 dB Dynamic Range RSSI.
168 +)))
169 +* (((
170 +Automatic RF Sense and CAD with ultra-fast AFC.
171 +)))
172 +* (((
173 +Packet engine up to 256 bytes with CRC.
174 +
175 +
176 +
177 +)))
178 +
101 101  == 1.3 Features ==
102 102  
181 +
103 103  * LoRaWAN Class A & Class C protocol
183 +
104 104  * Optional Customized LoRa Protocol
185 +
105 105  * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865/MA869
187 +
106 106  * AT Commands to change parameters
189 +
107 107  * Remote configure parameters via LoRa Downlink
191 +
108 108  * Firmware upgradable via program port
193 +
109 109  * Counting
110 110  
111 111  == 1.4 Applications ==
112 112  
198 +
113 113  * Smart Buildings & Home Automation
200 +
114 114  * Logistics and Supply Chain Management
202 +
115 115  * Smart Metering
204 +
116 116  * Smart Agriculture
206 +
117 117  * Smart Cities
208 +
118 118  * Smart Factory
119 119  
120 120  == 1.5 Hardware Variants ==
... ... @@ -136,10 +136,17 @@
136 136  
137 137  = 2. Power ON Device =
138 138  
230 +
231 +(((
139 139  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.
233 +)))
140 140  
235 +(((
141 141  PWR will on when device is properly powered.
142 142  
238 +
239 +)))
240 +
143 143  [[image:1653297104069-180.png]]
144 144  
145 145  
... ... @@ -1566,9 +1566,12 @@
1566 1566  == 3.7 LEDs Indicators ==
1567 1567  
1568 1568  
1569 -(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
1570 -|(% style="background-color:#4f81bd; color:white; width:50px" %)**LEDs**|(% style="background-color:#4f81bd; color:white; width:460px" %)**Feature**
1667 +(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
1668 +|(% style="background-color:#4f81bd; color:white; width:50px" %)**LEDs**|(% style="background-color:#4f81bd; color:white; width:470px" %)**Feature**
1571 1571  |**PWR**|Always on if there is power
1670 +|**SYS**|(((
1671 +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.
1672 +)))
1572 1572  |**TX**|(((
1573 1573  (((
1574 1574  Device boot: TX blinks 5 times.
... ... @@ -1583,16 +1583,20 @@
1583 1583  )))
1584 1584  )))
1585 1585  |**RX**|RX blinks once when receive a packet.
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
1687 +|**DO1**|
1688 +|**DO2**|
1689 +|**DO3**|
1690 +|**DI2**|(((
1691 +For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1590 1590  )))
1591 1591  |**DI2**|(((
1592 -For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1694 +For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1593 1593  )))
1594 -|**RO1**|For LT-22222-L: ON when RO1 is closed, LOW when RO1 is open
1595 -|**RO2**|For LT-22222-L: ON when RO2 is closed, LOW when RO2 is open
1696 +|**DI2**|(((
1697 +For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1698 +)))
1699 +|**RO1**|
1700 +|**RO2**|
1596 1596  
1597 1597  = 4. Use AT Command =
1598 1598  
... ... @@ -1603,6 +1603,10 @@
1603 1603  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.
1604 1604  )))
1605 1605  
1711 +(((
1712 +
1713 +)))
1714 +
1606 1606  [[image:1653358238933-385.png]]
1607 1607  
1608 1608  

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