Last modified by Saxer Lin on 2025/04/15 17:24
<
From version < 126.28 >
edited by Xiaoling
on 2023/06/19 16:43
To version < 136.1 >
edited by Mengting Qiu
on 2024/09/02 18:13
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Summary

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Title
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1 -LT-22222-L LoRa IO Controller User Manual
1 +LT-22222-L -- LoRa IO Controller User Manual
Author
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1 -XWiki.Xiaoling
1 +XWiki.ting
Content
... ... @@ -3,6 +3,10 @@
3 3  
4 4  
5 5  
6 +
7 +
8 +
9 +
6 6  **Table of Contents:**
7 7  
8 8  {{toc/}}
... ... @@ -53,166 +53,71 @@
53 53  
54 54  )))
55 55  
56 -== 1.2  Specifications ==
60 +== 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:
67 +** Idle: 4mA@12v
68 +** 20dB Transmit: 34mA@12v
69 +* Operating Temperature: -40 ~~ 85 Degree, No Dew
74 74  
75 -* (((
76 -Idle: 4mA@12v
77 -)))
78 -* (((
79 -20dB Transmit: 34mA@12v
80 -)))
81 -)))
82 -
83 -(((
84 -
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 -)))
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. 
107 107  
108 -(((
109 -
110 -
111 111  (% style="color:#037691" %)**LoRa Spec:**
112 -)))
113 113  
114 -* (((
115 -(((
116 -Frequency Range:
117 -)))
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.
118 118  
119 -* (((
120 -Band 1 (HF): 862 ~~ 1020 Mhz
121 -)))
122 -* (((
123 -Band 2 (LF): 410 ~~ 528 Mhz
124 -)))
125 -)))
126 -* (((
127 -168 dB maximum link budget.
128 -)))
129 -* (((
130 -+20 dBm - 100 mW constant RF output vs.
131 -)))
132 -* (((
133 -+14 dBm high efficiency PA.
134 -)))
135 -* (((
136 -Programmable bit rate up to 300 kbps.
137 -)))
138 -* (((
139 -High sensitivity: down to -148 dBm.
140 -)))
141 -* (((
142 -Bullet-proof front end: IIP3 = -12.5 dBm.
143 -)))
144 -* (((
145 -Excellent blocking immunity.
146 -)))
147 -* (((
148 -Low RX current of 10.3 mA, 200 nA register retention.
149 -)))
150 -* (((
151 -Fully integrated synthesizer with a resolution of 61 Hz.
152 -)))
153 -* (((
154 -FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
155 -)))
156 -* (((
157 -Built-in bit synchronizer for clock recovery.
158 -)))
159 -* (((
160 -Preamble detection.
161 -)))
162 -* (((
163 -127 dB Dynamic Range RSSI.
164 -)))
165 -* (((
166 -Automatic RF Sense and CAD with ultra-fast AFC.
167 -)))
168 -* (((
169 -Packet engine up to 256 bytes with CRC.
170 -
171 -
172 -
173 -)))
174 -
175 175  == 1.3 Features ==
176 176  
177 -
178 178  * LoRaWAN Class A & Class C protocol
179 -
180 180  * Optional Customized LoRa Protocol
181 -
182 182  * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865/MA869
183 -
184 184  * AT Commands to change parameters
185 -
186 186  * Remote configure parameters via LoRa Downlink
187 -
188 188  * Firmware upgradable via program port
189 -
190 190  * Counting
191 191  
111 +== 1.4 Applications ==
192 192  
193 -
194 -== 1.4  Applications ==
195 -
196 -
197 197  * Smart Buildings & Home Automation
198 -
199 199  * Logistics and Supply Chain Management
200 -
201 201  * Smart Metering
202 -
203 203  * Smart Agriculture
204 -
205 205  * Smart Cities
206 -
207 207  * Smart Factory
208 208  
209 -
210 -
211 211  == 1.5 Hardware Variants ==
212 212  
213 213  
214 214  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
215 -|(% style="background-color:#d9e2f3; color:#0070c0; width:103px" %)**Model**|(% style="background-color:#d9e2f3; color:#0070c0; width:131px" %)**Photo**|(% style="background-color:#d9e2f3; color:#0070c0; width:266px" %)**Description**
124 +|(% style="background-color:#4f81bd; color:white; width:103px" %)**Model**|(% style="background-color:#4f81bd; color:white; width:131px" %)**Photo**|(% style="background-color:#4f81bd; color:white; width:266px" %)**Description**
216 216  |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)(((
217 217  (% style="text-align:center" %)
218 218  [[image:image-20230424115112-1.png||height="106" width="58"]]
... ... @@ -225,21 +225,12 @@
225 225  * 1 x Counting Port
226 226  )))
227 227  
228 -
229 -
230 230  = 2. Power ON Device =
231 231  
232 -
233 -(((
234 234  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.
235 -)))
236 236  
237 -(((
238 238  PWR will on when device is properly powered.
239 239  
240 -
241 -)))
242 -
243 243  [[image:1653297104069-180.png]]
244 244  
245 245  
... ... @@ -324,8 +324,6 @@
324 324  
325 325  * (% style="color:blue" %)**ADDMOD6**(%%): Trigger Mode, Optional, used together with MOD1 ~~ MOD5
326 326  
327 -
328 -
329 329  === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
330 330  
331 331  
... ... @@ -333,7 +333,7 @@
333 333  The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default. (% style="display:none" %)
334 334  
335 335  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
336 -|(% style="background-color:#d9e2f3; color:#0070c0" %)**Size(bytes)**|(% style="background-color:#d9e2f3; color:#0070c0" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0" %)**1**
234 +|(% style="background-color:#4f81bd; color:white" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**
337 337  |Value|(((
338 338  AVI1 voltage
339 339  )))|(((
... ... @@ -394,8 +394,6 @@
394 394  ** DO1 is high in case there is load between DO1 and V+.
395 395  ** DO1 LED is off in both case
396 396  
397 -
398 -
399 399  === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
400 400  
401 401  
... ... @@ -407,7 +407,7 @@
407 407  Total : 11 bytes payload
408 408  
409 409  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
410 -|(% style="background-color:#d9e2f3; color:#0070c0" %)**Size(bytes)**|(% style="background-color:#d9e2f3; color:#0070c0" %)**4**|(% style="background-color:#d9e2f3; color:#0070c0" %)**4**|(% style="background-color:#d9e2f3; color:#0070c0" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0" %)**1**
306 +|(% style="background-color:#4f81bd; color:white" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white" %)**4**|(% style="background-color:#4f81bd; color:white" %)**4**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**
411 411  |Value|COUNT1|COUNT2 |DIDORO*|(((
412 412  Reserve
413 413  )))|MOD
... ... @@ -474,7 +474,7 @@
474 474  **LT22222-L**: This mode the DI1 is used as a counting pin.
475 475  
476 476  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
477 -|(% style="background-color:#d9e2f3; color:#0070c0" %)**Size(bytes)**|(% style="background-color:#d9e2f3; color:#0070c0" %)**4**|(% style="background-color:#d9e2f3; color:#0070c0" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0" %)**1**
373 +|(% style="background-color:#4f81bd; color:white" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white" %)**4**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**
478 478  |Value|COUNT1|(((
479 479  ACI1 Current
480 480  )))|(((
... ... @@ -527,7 +527,7 @@
527 527  The AVI1 is also used for counting. AVI1 is used to monitor the voltage. It will check the voltage **every 60s**, if voltage is higher or lower than VOLMAX mV, the AVI1 Counting increase 1, so AVI1 counting can be used to measure a machine working hour.
528 528  
529 529  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
530 -|(% style="background-color:#d9e2f3; color:#0070c0" %)**Size(bytes)**|(% style="background-color:#d9e2f3; color:#0070c0" %)**4**|(% style="background-color:#d9e2f3; color:#0070c0" %)**4**|(% style="background-color:#d9e2f3; color:#0070c0" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0" %)**1**
426 +|(% style="background-color:#4f81bd; color:white" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white" %)**4**|(% style="background-color:#4f81bd; color:white" %)**4**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**
531 531  |Value|COUNT1|AVI1 Counting|DIDORO*|(((
532 532  Reserve
533 533  )))|MOD
... ... @@ -587,7 +587,7 @@
587 587  **LT22222-L**: This mode the DI1 is used as a counting pin.
588 588  
589 589  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
590 -|(% style="background-color:#d9e2f3; color:#0070c0" %)**Size(bytes)**|(% style="background-color:#d9e2f3; color:#0070c0" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0" %)**1**
486 +|(% style="background-color:#4f81bd; color:white" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**
591 591  |Value|(((
592 592  AVI1 voltage
593 593  )))|(((
... ... @@ -723,7 +723,7 @@
723 723  MOD6 Payload : total 11 bytes payload
724 724  
725 725  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:515px" %)
726 -|(% style="background-color:#d9e2f3; color:#0070c0; width:60px" %)**Size(bytes)**|(% style="background-color:#d9e2f3; color:#0070c0; width:69px" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0; width:69px" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0; width:109px" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0; width:49px" %)**6**|(% style="background-color:#d9e2f3; color:#0070c0; width:109px" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0; width:50px" %)**1**
622 +|(% style="background-color:#4f81bd; color:white; width:60px" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white; width:69px" %)**1**|(% style="background-color:#4f81bd; color:white; width:69px" %)**1**|(% style="background-color:#4f81bd; color:white; width:109px" %)**1**|(% style="background-color:#4f81bd; color:white; width:49px" %)**6**|(% style="background-color:#4f81bd; color:white; width:109px" %)**1**|(% style="background-color:#4f81bd; color:white; width:50px" %)**1**
727 727  |Value|(((
728 728  TRI_A FLAG
729 729  )))|(((
... ... @@ -842,8 +842,6 @@
842 842  
843 843  * (% style="color:blue" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
844 844  
845 -
846 -
847 847  === 3.4.1 Common Commands ===
848 848  
849 849  
... ... @@ -1053,7 +1053,7 @@
1053 1053  01: Low,  00: High ,  11: No action
1054 1054  
1055 1055  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
1056 -|(% style="background-color:#d9e2f3; color:#0070c0" %)**Downlink Code**|(% style="background-color:#d9e2f3; color:#0070c0" %)**DO1**|(% style="background-color:#d9e2f3; color:#0070c0" %)**DO2**|(% style="background-color:#d9e2f3; color:#0070c0" %)**DO3**
950 +|(% style="background-color:#4f81bd; color:white" %)**Downlink Code**|(% style="background-color:#4f81bd; color:white" %)**DO1**|(% style="background-color:#4f81bd; color:white" %)**DO2**|(% style="background-color:#4f81bd; color:white" %)**DO3**
1057 1057  |02  01  00  11|Low|High|No Action
1058 1058  |02  00  11  01|High|No Action|Low
1059 1059  |02  11  01  00|No Action|Low|High
... ... @@ -1096,7 +1096,7 @@
1096 1096  (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1097 1097  
1098 1098  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1099 -|(% style="background-color:#d9e2f3; color:#0070c0" %)**Second Byte**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Status**
993 +|(% style="background-color:#4f81bd; color:white" %)**Second Byte**|(% style="background-color:#4f81bd; color:white" %)**Status**
1100 1100  |0x01|DO1 set to low
1101 1101  |0x00|DO1 set to high
1102 1102  |0x11|DO1 NO Action
... ... @@ -1104,7 +1104,7 @@
1104 1104  (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1105 1105  
1106 1106  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1107 -|(% style="background-color:#d9e2f3; color:#0070c0" %)**Second Byte**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Status**
1001 +|(% style="background-color:#4f81bd; color:white" %)**Second Byte**|(% style="background-color:#4f81bd; color:white" %)**Status**
1108 1108  |0x01|DO2 set to low
1109 1109  |0x00|DO2 set to high
1110 1110  |0x11|DO2 NO Action
... ... @@ -1112,7 +1112,7 @@
1112 1112  (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1113 1113  
1114 1114  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1115 -|(% style="background-color:#d9e2f3; color:#0070c0" %)**Second Byte**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Status**
1009 +|(% style="background-color:#4f81bd; color:white" %)**Second Byte**|(% style="background-color:#4f81bd; color:white" %)**Status**
1116 1116  |0x01|DO3 set to low
1117 1117  |0x00|DO3 set to high
1118 1118  |0x11|DO3 NO Action
... ... @@ -1149,7 +1149,7 @@
1149 1149  
1150 1150  
1151 1151  
1152 -==== 3.4.2. 14 Relay ~-~- Control Relay Output RO1/RO2 ====
1046 +==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1153 1153  
1154 1154  
1155 1155  * (% style="color:#037691" %)**AT Command:**
... ... @@ -1167,10 +1167,10 @@
1167 1167  )))
1168 1168  
1169 1169  (((
1170 -01: Close ,  00: Open , 11: No action
1064 +00: Close ,  01: Open , 11: No action
1171 1171  
1172 1172  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:320px" %)
1173 -|(% style="background-color:#d9e2f3; color:#0070c0" %)**Downlink Code**|(% style="background-color:#d9e2f3; color:#0070c0" %)**RO1**|(% style="background-color:#d9e2f3; color:#0070c0" %)**RO2**
1067 +|(% style="background-color:#4f81bd; color:white" %)**Downlink Code**|(% style="background-color:#4f81bd; color:white" %)**RO1**|(% style="background-color:#4f81bd; color:white" %)**RO2**
1174 1174  |03  00  11|Open|No Action
1175 1175  |03  01  11|Close|No Action
1176 1176  |03  11  00|No Action|Open
... ... @@ -1593,7 +1593,11 @@
1593 1593  
1594 1594  [[image:image-20230616235145-1.png]]
1595 1595  
1490 +(% style="color:blue" %)**Example5**(%%): Connect to Open Colleactor
1596 1596  
1492 +[[image:image-20240219115718-1.png]]
1493 +
1494 +
1597 1597  === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1598 1598  
1599 1599  
... ... @@ -1668,12 +1668,9 @@
1668 1668  == 3.7 LEDs Indicators ==
1669 1669  
1670 1670  
1671 -(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
1672 -|(% style="background-color:#d9e2f3; color:#0070c0; width:50px" %)**LEDs**|(% style="background-color:#d9e2f3; color:#0070c0; width:470px" %)**Feature**
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**
1673 1673  |**PWR**|Always on if there is power
1674 -|**SYS**|(((
1675 -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.
1676 -)))
1677 1677  |**TX**|(((
1678 1678  (((
1679 1679  Device boot: TX blinks 5 times.
... ... @@ -1688,23 +1688,17 @@
1688 1688  )))
1689 1689  )))
1690 1690  |**RX**|RX blinks once when receive a packet.
1691 -|**DO1**|
1692 -|**DO2**|
1693 -|**DO3**|
1694 -|**DI2**|(((
1695 -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
1696 1696  )))
1697 1697  |**DI2**|(((
1698 -For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1592 +For LT-22222-L: ON when DI2 is high, OFF when DI2 is low
1699 1699  )))
1700 -|**DI2**|(((
1701 -For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1702 -)))
1703 -|**RO1**|
1704 -|**RO2**|
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
1705 1705  
1706 -
1707 -
1708 1708  = 4. Use AT Command =
1709 1709  
1710 1710  == 4.1 Access AT Command ==
... ... @@ -1714,10 +1714,6 @@
1714 1714  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.
1715 1715  )))
1716 1716  
1717 -(((
1718 -
1719 -)))
1720 -
1721 1721  [[image:1653358238933-385.png]]
1722 1722  
1723 1723  
... ... @@ -2104,7 +2104,6 @@
2104 2104  
2105 2105  (% style="color:red" %)**Notice**(%%): In case user has lost the program cable. User can hand made one from a 3.5mm cable. The pin mapping is:
2106 2106  
2107 -
2108 2108  [[image:1653360054704-518.png||height="186" width="745"]]
2109 2109  
2110 2110  
... ... @@ -2243,6 +2243,12 @@
2243 2243  Firmware version needs to be no less than 1.6.0.
2244 2244  
2245 2245  
2130 +== 6.10 Why does the LT22222 always report 15.585V when measuring AVI? ==
2131 +
2132 +
2133 +It is likely that the GND is not connected during the measurement, or the wire connected to the GND is loose.
2134 +
2135 +
2246 2246  = 7. Trouble Shooting =
2247 2247  )))
2248 2248  
... ... @@ -2283,6 +2283,13 @@
2283 2283  )))
2284 2284  
2285 2285  
2176 +== 7.4 Why can LT22222 perform Uplink normally, but cannot receive Downlink? ==
2177 +
2178 +
2179 +The FCD count of the gateway is inconsistent with the FCD count of the node, causing the downlink to remain in the queue state.
2180 +Use this command to bring their counts back together: [[Resets the downlink packet count>>||anchor="H3.4.2.23Resetsthedownlinkpacketcount"]]
2181 +
2182 +
2286 2286  = 8. Order Info =
2287 2287  
2288 2288  
... ... @@ -2300,8 +2300,6 @@
2300 2300  * (% style="color:red" %)**IN865**(%%):  LT with frequency bands IN865
2301 2301  * (% style="color:red" %)**CN779**(%%):  LT with frequency bands CN779
2302 2302  
2303 -
2304 -
2305 2305  = 9. Packing Info =
2306 2306  
2307 2307  
... ... @@ -2319,8 +2319,6 @@
2319 2319  * Package Size / pcs : 14.5 x 8 x 5 cm
2320 2320  * Weight / pcs : 170g
2321 2321  
2322 -
2323 -
2324 2324  = 10. Support =
2325 2325  
2326 2326  
... ... @@ -2340,5 +2340,3 @@
2340 2340  * LT-22222-L: [[http:~~/~~/www.dragino.com/products/lora-lorawan-end-node/item/156-lt-22222-l.html>>url:http://www.dragino.com/products/lora-lorawan-end-node/item/156-lt-22222-l.html]]
2341 2341  * [[Datasheet, Document Base>>https://www.dropbox.com/sh/gxxmgks42tqfr3a/AACEdsj_mqzeoTOXARRlwYZ2a?dl=0]]
2342 2342  * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2343 -
2344 -
image-20240219115718-1.png
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... ... @@ -1,0 +1,1 @@
1 +XWiki.Edwin
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