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Last modified by Mengting Qiu on 2025/06/04 18:42
From version 70.1
edited by Xiaoling
on 2022/05/31 11:27
Change comment: There is no comment for this version
To version 77.31
edited by Xiaoling
on 2022/06/10 08:43
Change comment: There is no comment for this version

Summary

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Content
... ... @@ -11,12 +11,15 @@
11 11  
12 12  
13 13  
14 +
15 +
16 +
14 14  = 1.Introduction =
15 15  
16 16  == 1.1 What is LT Series I/O Controller ==
17 17  
18 18  (((
19 -The Dragino LT series I/O Modules are Long Range LoRaWAN I/O Controller. It contains different I/O Interfaces such as: analog current Input, analog voltage input, relay output, digital input and digital output etc. The LT I/O Modules are designed to simplify the installation of I/O monitoring.
22 +The Dragino (% style="color:blue" %)**LT series I/O Modules**(%%) are Long Range LoRaWAN I/O Controller. It contains different I/O Interfaces such as:** (% style="color:blue" %)analog current Input, analog voltage input(%%)**(% style="color:blue" %), **relay output**, **digital input**(%%) and (% style="color:blue" %)**digital output**(%%) etc. The LT I/O Modules are designed to simplify the installation of I/O monitoring.
20 20  )))
21 21  
22 22  (((
... ... @@ -24,7 +24,7 @@
24 24  )))
25 25  
26 26  (((
27 -The LT I/O Controllers is aiming to provide a simple plug and play, low cost installation by using LoRaWAN wireless technology.
30 +The LT I/O Controllers is aiming to provide an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa wireless technology.
28 28  )))
29 29  
30 30  (((
... ... @@ -48,6 +48,8 @@
48 48  == 1.2  Specifications ==
49 49  
50 50  (((
54 +
55 +
51 51  **Hardware System:**
52 52  )))
53 53  
... ... @@ -70,6 +70,7 @@
70 70  )))
71 71  )))
72 72  
78 +
73 73  (((
74 74  **Interface for Model: LT22222-L:**
75 75  )))
... ... @@ -93,6 +93,7 @@
93 93  Power Input 7~~ 24V DC. 
94 94  )))
95 95  
102 +
96 96  (((
97 97  **LoRa Spec:**
98 98  )))
... ... @@ -157,6 +157,8 @@
157 157  
158 158  )))
159 159  
167 +
168 +
160 160  == 1.3 Features ==
161 161  
162 162  * LoRaWAN Class A & Class C protocol
... ... @@ -167,6 +167,8 @@
167 167  * Firmware upgradable via program port
168 168  * Counting
169 169  
179 +
180 +
170 170  == 1.4  Applications ==
171 171  
172 172  * Smart Buildings & Home Automation
... ... @@ -176,6 +176,8 @@
176 176  * Smart Cities
177 177  * Smart Factory
178 178  
190 +
191 +
179 179  == 1.5 Hardware Variants ==
180 180  
181 181  (% border="1" style="background-color:#f7faff; width:500px" %)
... ... @@ -189,6 +189,8 @@
189 189  * 1 x Counting Port
190 190  )))
191 191  
205 +
206 +
192 192  = 2. Power ON Device =
193 193  
194 194  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.
... ... @@ -200,6 +200,7 @@
200 200  [[image:1653297104069-180.png]]
201 201  
202 202  
218 +
203 203  = 3. Operation Mode =
204 204  
205 205  == 3.1 How it works? ==
... ... @@ -214,6 +214,8 @@
214 214  
215 215  )))
216 216  
233 +
234 +
217 217  == 3.2 Example to join LoRaWAN network ==
218 218  
219 219  (((
... ... @@ -255,6 +255,7 @@
255 255  [[image:1653298044601-602.png||height="405" width="709"]]
256 256  
257 257  
276 +
258 258  == 3.3 Uplink Payload ==
259 259  
260 260  There are five working modes + one interrupt mode on LT for different type application:
... ... @@ -266,6 +266,8 @@
266 266  * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
267 267  * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
268 268  
288 +
289 +
269 269  === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
270 270  
271 271  The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
... ... @@ -301,6 +301,7 @@
301 301  * [1] RO1 relay channel is close and the RO1 LED is ON.
302 302  * [0] RO2 relay channel is open and RO2 LED is OFF;
303 303  
325 +
304 304  **LT22222-L:**
305 305  
306 306  * [1] DI2 channel is high input and DI2 LED is ON;
... ... @@ -316,6 +316,8 @@
316 316  ** DO1 is high in case there is load between DO1 and V+.
317 317  ** DO1 LED is off in both case
318 318  
341 +
342 +
319 319  === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
320 320  
321 321  **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
... ... @@ -409,6 +409,7 @@
409 409  )))
410 410  
411 411  
436 +
412 412  === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
413 413  
414 414  **LT22222-L**: This mode the DI1 is used as a counting pin.
... ... @@ -453,6 +453,8 @@
453 453  
454 454  )))
455 455  
481 +
482 +
456 456  === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
457 457  
458 458  **LT22222-L**: This mode the DI1 is used as a counting pin.
... ... @@ -534,6 +534,7 @@
534 534  )))
535 535  
536 536  
564 +
537 537  === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
538 538  
539 539  **LT22222-L**: This mode the DI1 is used as a counting pin.
... ... @@ -578,6 +578,8 @@
578 578  
579 579  )))
580 580  
609 +
610 +
581 581  === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
582 582  
583 583  (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
... ... @@ -604,6 +604,7 @@
604 604  
605 605  AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
606 606  
637 +
607 607  (% style="color:#4f81bd" %)**Trigger base on current**:
608 608  
609 609  Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
... ... @@ -612,6 +612,7 @@
612 612  
613 613  AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
614 614  
646 +
615 615  (% style="color:#4f81bd" %)**Trigger base on DI status**:
616 616  
617 617  DI status trigger Flag.
... ... @@ -699,6 +699,7 @@
699 699  When device got this command, it will send the MOD6 payload.
700 700  
701 701  
734 +
702 702  === 3.3.7 Payload Decoder ===
703 703  
704 704  (((
... ... @@ -707,6 +707,8 @@
707 707  
708 708  )))
709 709  
743 +
744 +
710 710  == 3.4 ​Configure LT via AT or Downlink ==
711 711  
712 712  User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
... ... @@ -715,15 +715,18 @@
715 715  There are two kinds of Commands:
716 716  )))
717 717  
718 -* (% style="color:#4f81bd" %)**Common Commands**(%%): They should be available for each sensor, such as: change uplink interval, reset device. For firmware v1.5.4, user can find what common commands it supports: http:~/~/wiki.dragino.com/index.php?title=End_Device_AT_Commands_and_Downlink_Commands
753 +* (% style="color:#4f81bd" %)**Common Commands**(%%): They should be available for each sensor, such as: change uplink interval, reset device. For firmware v1.5.4, user can find what common commands it supports: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
719 719  
720 720  * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
721 721  
757 +
758 +
722 722  === 3.4.1 Common Commands ===
723 723  
724 724  They should be available for each of Dragino Sensors, such as: change uplink interval, reset device. For firmware v1.5.4, user can find what common commands it supports: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
725 725  
726 726  
764 +
727 727  === 3.4.2 Sensor related commands ===
728 728  
729 729  ==== 3.4.2.1 Set Transmit Interval ====
... ... @@ -747,6 +747,7 @@
747 747  )))
748 748  
749 749  
788 +
750 750  ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
751 751  
752 752  Set work mode.
... ... @@ -768,6 +768,7 @@
768 768  )))
769 769  
770 770  
810 +
771 771  ==== 3.4.2.3 Poll an uplink ====
772 772  
773 773  * AT Command:
... ... @@ -784,9 +784,10 @@
784 784  **Example**: 0x08FF, ask device to send an Uplink
785 785  
786 786  
827 +
787 787  ==== 3.4.2.4 Enable Trigger Mode ====
788 788  
789 -Use of trigger mode, please check [[ADDMOD6>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
830 +Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
790 790  
791 791  * AT Command:
792 792  
... ... @@ -807,6 +807,7 @@
807 807  )))
808 808  
809 809  
851 +
810 810  ==== 3.4.2.5 Poll trigger settings ====
811 811  
812 812  Poll trigger settings,
... ... @@ -823,6 +823,7 @@
823 823  )))
824 824  
825 825  
868 +
826 826  ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
827 827  
828 828  Enable Disable DI1/DI2/DI2 as trigger,
... ... @@ -846,6 +846,7 @@
846 846  )))
847 847  
848 848  
892 +
849 849  ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
850 850  
851 851  Set DI1 or DI3(for LT-33222-L) trigger.
... ... @@ -873,6 +873,7 @@
873 873  )))
874 874  
875 875  
920 +
876 876  ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
877 877  
878 878  Set DI2 trigger.
... ... @@ -900,9 +900,10 @@
900 900  )))
901 901  
902 902  
948 +
903 903  ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
904 904  
905 -Set current trigger , base on AC port. See [[trigger mode>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
951 +Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
906 906  
907 907  * AT Command:
908 908  
... ... @@ -915,19 +915,20 @@
915 915  
916 916  (% class="box infomessage" %)
917 917  (((
918 -**0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]**
964 +**0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
919 919  )))
920 920  
921 921  
968 +
922 922  ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
923 923  
924 -Set current trigger , base on AV port. See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
971 +Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
925 925  
926 926  * AT Command:
927 927  
928 928  (% class="box infomessage" %)
929 929  (((
930 -**AT+AVLIM. See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]**
977 +**AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
931 931  )))
932 932  
933 933  * Downlink Payload (prefix 0xAA 00 ):
... ... @@ -934,10 +934,11 @@
934 934  
935 935  (% class="box infomessage" %)
936 936  (((
937 -**0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]] **
984 +**0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
938 938  )))
939 939  
940 940  
988 +
941 941  ==== 3.4.2.11 Trigger – Set minimum interval ====
942 942  
943 943  Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
... ... @@ -957,6 +957,7 @@
957 957  )))
958 958  
959 959  
1008 +
960 960  ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
961 961  
962 962  * AT Command:
... ... @@ -989,6 +989,7 @@
989 989  )))
990 990  
991 991  
1041 +
992 992  ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
993 993  
994 994  * AT Command:
... ... @@ -1051,6 +1051,7 @@
1051 1051  DO1 pin no action, DO2 pin set low, DO3 pin set high, last 2 seconds, then DO1 pin no action, DO2 pin set high, DO3 pin set low
1052 1052  
1053 1053  
1104 +
1054 1054  === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1055 1055  
1056 1056  * AT Command:
... ... @@ -1079,6 +1079,7 @@
1079 1079  Device will upload a packet if downlink code executes successfully.
1080 1080  
1081 1081  
1133 +
1082 1082  ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1083 1083  
1084 1084  * AT Command:
... ... @@ -1129,15 +1129,16 @@
1129 1129  Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1130 1130  
1131 1131  
1184 +
1132 1132  ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1133 1133  
1134 -When voltage exceed the threshold, count. Feature see [[MOD4>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting]]
1187 +When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1135 1135  
1136 1136  * AT Command:
1137 1137  
1138 1138  (% class="box infomessage" %)
1139 1139  (((
1140 -**AT+VOLMAX    ~/~/ See [[MOD4>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting]]**
1193 +**AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1141 1141  )))
1142 1142  
1143 1143  * Downlink Payload (prefix 0xA5):
... ... @@ -1148,6 +1148,7 @@
1148 1148  )))
1149 1149  
1150 1150  
1204 +
1151 1151  ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1152 1152  
1153 1153  * AT Command:
... ... @@ -1173,6 +1173,7 @@
1173 1173  )))
1174 1174  
1175 1175  
1230 +
1176 1176  ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1177 1177  
1178 1178  Clear counting for counting mode
... ... @@ -1192,6 +1192,7 @@
1192 1192  )))
1193 1193  
1194 1194  
1250 +
1195 1195  ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1196 1196  
1197 1197  * AT Command:
... ... @@ -1214,6 +1214,8 @@
1214 1214  
1215 1215  )))
1216 1216  
1273 +
1274 +
1217 1217  == 3.5 Integrate with Mydevice ==
1218 1218  
1219 1219  Mydevices provides a human friendly interface to show the sensor data, once we have data in TTN, we can use Mydevices to connect to TTN and see the data in Mydevices. Below are the steps:
... ... @@ -1232,6 +1232,7 @@
1232 1232  
1233 1233  [[image:image-20220524094641-12.png||height="402" width="718"]]
1234 1234  
1293 +
1235 1235  **Step 3**: Create an account or log in Mydevices.
1236 1236  
1237 1237  **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
... ... @@ -1254,6 +1254,7 @@
1254 1254  [[image:image-20220524094909-5.png||height="341" width="734"]]
1255 1255  
1256 1256  
1316 +
1257 1257  == 3.6 Interface Detail ==
1258 1258  
1259 1259  === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
... ... @@ -1263,6 +1263,7 @@
1263 1263  [[image:1653356991268-289.png]]
1264 1264  
1265 1265  
1326 +
1266 1266  === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1267 1267  
1268 1268  (((
... ... @@ -1278,52 +1278,106 @@
1278 1278  [[image:1653357170703-587.png]]
1279 1279  
1280 1280  (((
1342 +(((
1281 1281  When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1282 1282  )))
1345 +)))
1283 1283  
1347 +(((
1348 +
1349 +)))
1284 1284  
1351 +(((
1285 1285  **Example1**: Connect to a Low active sensor.
1353 +)))
1286 1286  
1355 +(((
1287 1287  This type of sensor will output a low signal GND when active.
1357 +)))
1288 1288  
1289 -* Connect sensor’s output to DI1-
1290 -* Connect sensor’s VCC to DI1+.
1359 +* (((
1360 +Connect sensor’s output to DI1-
1361 +)))
1362 +* (((
1363 +Connect sensor’s VCC to DI1+.
1364 +)))
1291 1291  
1292 -So when sensor active, the current between NEC2501 pin1 and pin2 is： ​​
1366 +(((
1367 +So when sensor active, the current between NEC2501 pin1 and pin2 is：
1368 +)))
1293 1293  
1294 -[[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]** [[image:image-20220524095628-8.png]] = DI1+ / 1K.**
1370 +(((
1371 +[[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1372 +)))
1295 1295  
1296 -If DI1+ = 12v, the //IF// = 12mA , So the LT-22222-L will be able to detect this active signal.
1374 +(((
1375 +If DI1+ = 12v, the [[image:1653968155772-850.png||height="23" width="19"]]= 12mA , So the LT-22222-L will be able to detect this active signal.
1376 +)))
1297 1297  
1378 +(((
1379 +
1380 +)))
1298 1298  
1382 +(((
1299 1299  **Example2**: Connect to a High active sensor.
1384 +)))
1300 1300  
1386 +(((
1301 1301  This type of sensor will output a high signal (example 24v) when active.
1388 +)))
1302 1302  
1303 -* Connect sensor’s output to DI1+
1304 -* Connect sensor’s GND DI1-.
1390 +* (((
1391 +Connect sensor’s output to DI1+
1392 +)))
1393 +* (((
1394 +Connect sensor’s GND DI1-.
1395 +)))
1305 1305  
1397 +(((
1306 1306  So when sensor active, the current between NEC2501 pin1 and pin2 is:
1399 +)))
1307 1307  
1308 -[[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]** [[image:image-20220524095628-8.png]]= DI1+ / 1K.**
1401 +(((
1402 +[[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1403 +)))
1309 1309  
1310 -If **DI1+ = 24v**, the [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]**[[image:image-20220524095628-8.png]]** = 24mA , So the LT-22222-L will be able to detect this high active signal.
1405 +(((
1406 +If **DI1+ = 24v**, the[[image:1653968155772-850.png||height="23" width="19"]] 24mA , So the LT-22222-L will be able to detect this high active signal.
1407 +)))
1311 1311  
1409 +(((
1410 +
1411 +)))
1312 1312  
1413 +(((
1313 1313  **Example3**: Connect to a 220v high active sensor.
1415 +)))
1314 1314  
1417 +(((
1315 1315  Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1419 +)))
1316 1316  
1317 -* Connect sensor’s output to DI1+ with a serial 50K resistor
1318 -* Connect sensor’s GND DI1-.
1421 +* (((
1422 +Connect sensor’s output to DI1+ with a serial 50K resistor
1423 +)))
1424 +* (((
1425 +Connect sensor’s GND DI1-.
1426 +)))
1319 1319  
1428 +(((
1320 1320  So when sensor active, the current between NEC2501 pin1 and pin2 is:
1430 +)))
1321 1321  
1322 - [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]**[[image:image-20220524095628-8.png]] = DI1+ / 51K.**
1432 +(((
1433 + [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1434 +)))
1323 1323  
1324 -If sensor output is 220v, the (% id="cke_bm_243359S" style="display:none" %)[[image:image-20220524095628-8.png]](%%) = DI1+ / 51K.  = 4.3mA , So the LT-22222-L will be able to detect this high active signal safely.
1436 +(((
1437 +If sensor output is 220v, the [[image:1653968155772-850.png||height="23" width="19"]](% id="cke_bm_243359S" style="display:none" %)[[image:image-20220524095628-8.png]](%%) = DI1+ / 51K.  = 4.3mA , So the LT-22222-L will be able to detect this high active signal safely.
1438 +)))
1325 1325  
1326 1326  
1441 +
1327 1327  === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1328 1328  
1329 1329  NPN output: GND or Float. Max voltage can apply to output pin is 36v.
... ... @@ -1331,6 +1331,7 @@
1331 1331  [[image:1653357531600-905.png]]
1332 1332  
1333 1333  
1449 +
1334 1334  === 3.6.4 Analog Input Interface ===
1335 1335  
1336 1336  The analog input interface is as below. The LT will measure the IN2 voltage so to calculate the current pass the Load. The formula is:
... ... @@ -1359,6 +1359,7 @@
1359 1359  [[image:1653357648330-671.png||height="155" width="733"]]
1360 1360  
1361 1361  
1478 +
1362 1362  === 3.6.5 Relay Output ===
1363 1363  
1364 1364  (((
... ... @@ -1802,6 +1802,11 @@
1802 1802  (((
1803 1803  User can run AT+DEBUG command to see the counting event in serial. If firmware too old and doesn’t support AT+DEBUG. User can update to latest firmware first.
1804 1804  
1922 +
1923 +== 5.5 Can i use point to point communication for LT-22222-L? ==
1924 +
1925 +Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1926 +
1805 1805  
1806 1806  )))
1807 1807  
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