Last modified by Saxer Lin on 2025/04/15 17:24
<
From version < 90.9 >
edited by Xiaoling
on 2022/08/18 13:43
To version < 100.1 >
edited by Bei Jinggeng
on 2022/10/08 09:59
>
Change comment: Uploaded new attachment "image-20221008095908-1.png", version {1}

Summary

Details

Page properties
Author
... ... @@ -1,1 +1,1 @@
1 -XWiki.Xiaoling
1 +XWiki.Bei
Content
... ... @@ -15,6 +15,7 @@
15 15  
16 16  = 1.Introduction =
17 17  
18 +
18 18  == 1.1 What is LT Series I/O Controller ==
19 19  
20 20  (((
... ... @@ -57,7 +57,7 @@
57 57  (((
58 58  
59 59  
60 -**Hardware System:**
61 +(% style="color:#037691" %)**Hardware System:**
61 61  )))
62 62  
63 63  * (((
... ... @@ -82,7 +82,7 @@
82 82  (((
83 83  
84 84  
85 -**Interface for Model: LT22222-L:**
86 +(% style="color:#037691" %)**Interface for Model: LT22222-L:**
86 86  )))
87 87  
88 88  * (((
... ... @@ -107,7 +107,7 @@
107 107  (((
108 108  
109 109  
110 -**LoRa Spec:**
111 +(% style="color:#037691" %)**LoRa Spec:**
111 111  )))
112 112  
113 113  * (((
... ... @@ -177,7 +177,7 @@
177 177  
178 178  * LoRaWAN Class A & Class C protocol
179 179  * Optional Customized LoRa Protocol
180 -* Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
181 +* Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865/MA869
181 181  * AT Commands to change parameters
182 182  * Remote configure parameters via LoRa Downlink
183 183  * Firmware upgradable via program port
... ... @@ -184,6 +184,7 @@
184 184  * Counting
185 185  
186 186  
188 +
187 187  == 1.4  Applications ==
188 188  
189 189  
... ... @@ -195,6 +195,7 @@
195 195  * Smart Factory
196 196  
197 197  
200 +
198 198  == 1.5 Hardware Variants ==
199 199  
200 200  
... ... @@ -209,6 +209,8 @@
209 209  * 1 x Counting Port
210 210  )))
211 211  
215 +
216 +
212 212  = 2. Power ON Device =
213 213  
214 214  
... ... @@ -216,6 +216,8 @@
216 216  
217 217  (((
218 218  PWR will on when device is properly powered.
224 +
225 +
219 219  )))
220 220  
221 221  [[image:1653297104069-180.png]]
... ... @@ -224,6 +224,7 @@
224 224  
225 225  = 3. Operation Mode =
226 226  
234 +
227 227  == 3.1 How it works? ==
228 228  
229 229  
... ... @@ -300,6 +300,7 @@
300 300  * (% style="color:blue" %)**ADDMOD6**(%%): Trigger Mode, Optional, used together with MOD1 ~~ MOD5
301 301  
302 302  
311 +
303 303  === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
304 304  
305 305  
... ... @@ -319,8 +319,9 @@
319 319  * DI is for digital input. DIx=1: high or float, DIx=0: low.
320 320  * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
321 321  
322 -(% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
323 323  
332 +(% style="color:red" %)**Note: DI3 and DO3 bit are not valid for LT-22222-L**
333 +
324 324  For example if payload is: [[image:image-20220523175847-2.png]]
325 325  
326 326  
... ... @@ -339,6 +339,7 @@
339 339  * [1] RO1 relay channel is close and the RO1 LED is ON.
340 340  * [0] RO2 relay channel is open and RO2 LED is OFF;
341 341  
352 +
342 342  **LT22222-L:**
343 343  
344 344  * [1] DI2 channel is high input and DI2 LED is ON;
... ... @@ -355,6 +355,8 @@
355 355  ** DO1 LED is off in both case
356 356  
357 357  
369 +
370 +
358 358  === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
359 359  
360 360  
... ... @@ -378,7 +378,7 @@
378 378  * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
379 379  
380 380  (((
381 -(% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
394 +(% style="color:red" %)**Note: DO3 bit is not valid for LT-22222-L.**
382 382  )))
383 383  
384 384  (((
... ... @@ -400,6 +400,8 @@
400 400  
401 401  
402 402  (% style="color:#4f81bd" %)**AT Commands for counting:**
416 +
417 +
403 403  )))
404 404  
405 405  (((
... ... @@ -441,7 +441,7 @@
441 441  * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
442 442  
443 443  (((
444 -(% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
459 +(% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
445 445  )))
446 446  
447 447  
... ... @@ -485,7 +485,7 @@
485 485  * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
486 486  
487 487  (((
488 -(% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
503 +(% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
489 489  )))
490 490  
491 491  (((
... ... @@ -546,7 +546,7 @@
546 546  )))
547 547  
548 548  (((
549 -(% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
564 +(% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
550 550  )))
551 551  
552 552  (((
... ... @@ -580,11 +580,14 @@
580 580  * **AT+MOD=1 ** **~-~->**  The normal working mode
581 581  * **AT+ADDMOD6=1**   **~-~->**  Enable trigger
582 582  
598 +
583 583  LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
584 584  
585 585  1. Periodically uplink (Base on TDC time). Payload is same as the normal MOD (MOD 1 for above command). This uplink uses LoRaWAN (% style="color:#4f81bd" %)**unconfirmed**(%%) data type
586 586  1. Trigger uplink when meet the trigger condition. LT will sent two packets in this case, the first uplink use payload specify in this mod (mod=6), the second packets use the normal mod payload(MOD=1 for above settings). Both Uplinks use LoRaWAN (% style="color:#4f81bd" %)**CONFIRMED data type.**
587 587  
604 +
605 +
588 588  (% style="color:#037691" %)**AT Command to set Trigger Condition**:
589 589  
590 590  
... ... @@ -592,6 +592,7 @@
592 592  
593 593  Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
594 594  
613 +
595 595  **Example:**
596 596  
597 597  AT+AVLIM=3000,6000,0,2000   (If AVI1 voltage lower than 3v or higher than 6v. or AV2 voltage is higher than 2v, LT will trigger Uplink)
... ... @@ -604,6 +604,7 @@
604 604  
605 605  Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
606 606  
626 +
607 607  **Example:**
608 608  
609 609  AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
... ... @@ -622,6 +622,7 @@
622 622  AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
623 623  
624 624  
645 +
625 625  (% style="color:#037691" %)**Downlink Command to set Trigger Condition:**
626 626  
627 627  Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
... ... @@ -665,11 +665,13 @@
665 665  
666 666  * Each bits shows if the corresponding trigger has been configured.
667 667  
689 +
668 668  **Example:**
669 669  
670 670  10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
671 671  
672 672  
695 +
673 673  (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
674 674  
675 675  [[image:image-20220524090249-3.png]]
... ... @@ -676,11 +676,13 @@
676 676  
677 677  * Each bits shows which status has been trigger on this uplink.
678 678  
702 +
679 679  **Example:**
680 680  
681 681  10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
682 682  
683 683  
708 +
684 684  (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
685 685  
686 686  [[image:image-20220524090456-4.png]]
... ... @@ -687,6 +687,7 @@
687 687  
688 688  * Each bits shows which status has been trigger on this uplink.
689 689  
715 +
690 690  **Example:**
691 691  
692 692  00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
... ... @@ -694,6 +694,7 @@
694 694  00000101: Means both DI1 and DI2 trigger are enabled.
695 695  
696 696  
723 +
697 697  (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
698 698  
699 699  Downlink command to poll MOD6 status:
... ... @@ -704,6 +704,7 @@
704 704  
705 705  
706 706  
734 +
707 707  === 3.3.7 Payload Decoder ===
708 708  
709 709  (((
... ... @@ -791,6 +791,7 @@
791 791  
792 792  **0x08 FF     **~/~/ Poll an uplink
793 793  
822 +
794 794  **Example**: 0x08FF, ask device to send an Uplink
795 795  
796 796  
... ... @@ -878,6 +878,7 @@
878 878  * **0x09 01 aa bb cc    ** ~/~/ same as AT+TRIG1=aa,0x(bb cc)
879 879  
880 880  
910 +
881 881  ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
882 882  
883 883  
... ... @@ -956,7 +956,7 @@
956 956  (((
957 957  
958 958  
959 -(% style="color:red" %)Note: ATDC setting must be more than 5min
989 +(% style="color:red" %)**Note: ATDC setting must be more than 5min**
960 960  )))
961 961  
962 962  
... ... @@ -984,11 +984,11 @@
984 984  [[image:image-20220524092754-5.png]]
985 985  
986 986  (((
987 -(% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1017 +(% style="color:red" %)**Note: For LT-22222-L, there is no DO3, the last byte can use any value.**
988 988  )))
989 989  
990 990  (((
991 -(% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1021 +(% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
992 992  )))
993 993  
994 994  
... ... @@ -1033,11 +1033,11 @@
1033 1033  [[image:image-20220524093351-8.png]]
1034 1034  
1035 1035  
1036 -(% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1066 +(% style="color:#4f81bd" %)**Sixth and Seventh and Eighth and Ninth Byte**:
1037 1037  
1038 1038   Latching time. Unit: ms
1039 1039  
1040 -Device will upload a packet if downlink code executes successfully.
1070 +(% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1041 1041  
1042 1042  
1043 1043  **Example payload:**
... ... @@ -1086,7 +1086,7 @@
1086 1086  [[image:image-20220524093724-9.png]]
1087 1087  )))
1088 1088  
1089 -Device will upload a packet if downlink code executes successfully.
1119 +(% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1090 1090  
1091 1091  
1092 1092  
... ... @@ -1120,9 +1120,9 @@
1120 1120  [[image:image-20220714135731-1.png||height="406" width="627"]]
1121 1121  
1122 1122  
1123 -(% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1153 +(% style="color:#4f81bd" %)**Fourth/Fifth/Sixth/Seventh Bytes(cc)**(%%): Latching time. Unit: ms
1124 1124  
1125 -Device will upload a packet if downlink code executes successfully.
1155 +(% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1126 1126  
1127 1127  
1128 1128  **Example payload:**
... ... @@ -1145,7 +1145,6 @@
1145 1145  
1146 1146  
1147 1147  
1148 -
1149 1149  ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1150 1150  
1151 1151  
... ... @@ -1218,11 +1218,121 @@
1218 1218  (((
1219 1219  range: aa bb cc:0 to 16777215,  (unit:second)
1220 1220  
1250 +
1251 +
1221 1221  
1222 1222  )))
1223 1223  
1255 +==== 3.4.2.20 Reset save DR DO state ====
1224 1224  
1225 1225  
1258 +* (% style="color:#037691" %)**AT Command:**
1259 +
1260 +**AT+RODORET=1  **~/~/ RODO will close when the device joining the network. (default)
1261 +
1262 +**AT+RODORET=0  **~/~/After the device is reset, the previously saved RODO state (only MOD2 to MOD5) is read, and its state is not changed when it is reconnected to the network.
1263 +
1264 +
1265 +* (% style="color:#037691" %)**Downlink Payload (prefix 0xAD):**
1266 +
1267 +**0x AD aa      **~/~/ same as AT+RODORET =aa
1268 +
1269 +(((
1270 +
1271 +
1272 +
1273 +
1274 +==== 3.4.2.21 Encrypted payload ====
1275 +
1276 +
1277 +* (% style="color:#037691" %)**AT Command:**
1278 +
1279 +**AT+DECRYPT=1  **~/~/ The payload is uploaded without encryption
1280 +
1281 +**AT+DECRYPT=0  **~/~/Encrypt when uploading payload (default)
1282 +
1283 +
1284 +
1285 +
1286 +==== 3.4.2.22 Get sensor value ====
1287 +
1288 +
1289 +* (% style="color:#037691" %)**AT Command:**
1290 +
1291 +**AT+GETSENSORVALUE=0  **~/~/ The serial port gets the reading of the current sensor
1292 +
1293 +**AT+GETSENSORVALUE=1  **~/~/The serial port gets the current sensor reading and uploads it.
1294 +
1295 +
1296 +
1297 +
1298 +==== 3.4.2.23 Resets the downlink packet count ====
1299 +
1300 +
1301 +* (% style="color:#037691" %)**AT Command:**
1302 +
1303 +**AT+DISFCNTCHECK=0  **~/~/ When the downlink packet count sent by the server is less than the node downlink packet count or exceeds 16384, the node will no longer receive downlink packets (default)
1304 +
1305 +**AT+DISFCNTCHECK=1  **~/~/When the downlink packet count sent by the server is less than the node downlink packet count or exceeds 16384, the node resets the downlink packet count and keeps it consistent with the server downlink packet count.
1306 +
1307 +
1308 +
1309 +
1310 +==== 3.4.2.24 When the limit bytes are exceeded, upload in batches ====
1311 +
1312 +
1313 +* (% style="color:#037691" %)**AT Command:**
1314 +
1315 + **AT+DISMACANS=0**  ~/~/ When the MACANS of the reply server plus the payload exceeds the maximum number of bytes of 11 bytes (DR0 of US915, DR2 of AS923, DR2 of AU195), the node will send a packet with a payload of 00 and a port of 4. (default)
1316 +
1317 + **AT+DISMACANS=1**      ~/~/ When the MACANS of the reply server plus the payload exceeds the maximum number of bytes of the DR, the node will ignore the MACANS and not reply, and only upload the payload part.
1318 +
1319 +
1320 +* (% style="color:#037691" %)**Downlink Payload **(%%)**:**
1321 +
1322 +**0x21 00 01 ** ~/~/ Set  the DISMACANS=1
1323 +
1324 +
1325 +
1326 +
1327 +==== 3.4.2.25 Copy downlink to uplink ====
1328 +
1329 +
1330 +* (% style="color:#037691" %)**AT Command**(%%)**:**
1331 +
1332 + **AT+RPL=5**  ~/~/ After receiving the package from the server, it will immediately upload the content of the package to the server, the port number is 100.
1333 +
1334 +Example：**aa xx xx xx xx**         ~/~/ aa indicates whether the configuration has changed, 00 is yes, 01 is no; xx xx xx xx are the bytes sent.
1335 +
1336 +[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220823173747-6.png?width=1124&height=165&rev=1.1||alt="image-20220823173747-6.png"]]
1337 +
1338 +For example, sending 11 22 33 44 55 66 77 will return invalid configuration 00 11 22 33 44 55 66 77.
1339 +
1340 +[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220823173833-7.png?width=1124&height=149&rev=1.1||alt="image-20220823173833-7.png"]]
1341 +
1342 +For example, if 01 00 02 58 is issued, a valid configuration of 01 01 00 02 58 will be returned.
1343 +
1344 +
1345 +
1346 +==== 3.4.2.26 Query version number and frequency band 、TDC ====
1347 +
1348 +
1349 +* (((
1350 +(% style="color:#037691" %)**Downlink Payload**(%%)**:**
1351 +
1352 +**26 01  ** ~/~/ Downlink 26 01 can query device upload frequency, frequency band, software version number, TDC time.
1353 +
1354 +
1355 +)))
1356 +
1357 +**Example：**
1358 +
1359 +[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220823173929-8.png?width=1205&height=76&rev=1.1||alt="image-20220823173929-8.png"]]
1360 +
1361 +
1362 +
1363 +)))
1364 +
1226 1226  == 3.5 Integrate with Mydevice ==
1227 1227  
1228 1228  
... ... @@ -1321,10 +1321,10 @@
1321 1321  )))
1322 1322  
1323 1323  * (((
1324 -Connect sensor’s output to DI1-
1463 +Connect sensor's output to DI1-
1325 1325  )))
1326 1326  * (((
1327 -Connect sensor’s VCC to DI1+.
1466 +Connect sensor's VCC to DI1+.
1328 1328  )))
1329 1329  
1330 1330  (((
... ... @@ -1332,11 +1332,11 @@
1332 1332  )))
1333 1333  
1334 1334  (((
1335 -[[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1474 +[[image:1653968155772-850.png||height="23" width="19"]]**= DI1**+** / 1K.**
1336 1336  )))
1337 1337  
1338 1338  (((
1339 -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.
1478 +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.
1340 1340  )))
1341 1341  
1342 1342  (((
... ... @@ -1354,10 +1354,10 @@
1354 1354  )))
1355 1355  
1356 1356  * (((
1357 -Connect sensor’s output to DI1+
1496 +Connect sensor's output to DI1+
1358 1358  )))
1359 1359  * (((
1360 -Connect sensor’s GND DI1-.
1499 +Connect sensor's GND DI1-.
1361 1361  )))
1362 1362  
1363 1363  (((
... ... @@ -1387,10 +1387,10 @@
1387 1387  )))
1388 1388  
1389 1389  * (((
1390 -Connect sensor’s output to DI1+ with a serial 50K resistor
1529 +Connect sensor's output to DI1+ with a serial 50K resistor
1391 1391  )))
1392 1392  * (((
1393 -Connect sensor’s GND DI1-.
1532 +Connect sensor's GND DI1-.
1394 1394  )))
1395 1395  
1396 1396  (((
... ... @@ -1457,6 +1457,7 @@
1457 1457  
1458 1458  [[image:image-20220524100215-9.png]]
1459 1459  
1599 +
1460 1460  [[image:image-20220524100215-10.png||height="382" width="723"]]
1461 1461  
1462 1462  
... ... @@ -1789,6 +1789,8 @@
1789 1789  2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1790 1790  3. Make sure SF / bandwidth setting in LG01/LG02 match the settings of AT+DR. refer [[this link>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.
1791 1791  4. The command AT+RX2FQ and AT+RX2DR is to let downlink work. to set the correct parameters, user can check the actually downlink parameters to be used. As below. Which shows the RX2FQ should use 868400000 and RX2DR should be 5
1932 +
1933 +
1792 1792  )))
1793 1793  
1794 1794  (((
... ... @@ -1828,7 +1828,7 @@
1828 1828  
1829 1829  (((
1830 1830  (% style="color:blue" %)**Step1**(%%)**:** Download [[flash loader>>url:https://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-programmers/flasher-stm32.html]].
1831 -(% style="color:blue" %)**Step2**(%%)**:** Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1973 +(% style="color:blue" %)**Step2**(%%)**:** Download the [[LT Image files>>url:https://www.dropbox.com/sh/g99v0fxcltn9r1y/AADKXQ2v5ZT-S3sxdmbvE7UAa/LT-22222-L/image?dl=0&subfolder_nav_tracking=1]].
1832 1832  (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1833 1833  
1834 1834  
... ... @@ -1884,6 +1884,7 @@
1884 1884  (((
1885 1885  Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1886 1886  
2029 +
1887 1887  
1888 1888  )))
1889 1889  )))
... ... @@ -1890,10 +1890,14 @@
1890 1890  
1891 1891  (((
1892 1892  (% style="color:blue" %)**Step1**(%%):  Log in TTN, Create an ABP device in the application and input the network session key (NETSKEY), app session key (APPSKEY) from the device.
2036 +
2037 +
1893 1893  )))
1894 1894  
1895 1895  (((
1896 1896  [[image:1653360231087-571.png||height="401" width="727"]]
2042 +
2043 +
1897 1897  )))
1898 1898  
1899 1899  (((
... ... @@ -1901,8 +1901,11 @@
1901 1901  )))
1902 1902  
1903 1903  
2051 +
1904 1904  (((
1905 1905  (% style="color:blue" %)**Step2**(%%)**:  **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
2054 +
2055 +
1906 1906  )))
1907 1907  
1908 1908  (((
... ... @@ -1957,8 +1957,18 @@
1957 1957  After restart, the status before power failure will be read from flash.
1958 1958  
1959 1959  
2110 +== 5.7 Can i set up LT-22222-L as a NC(Normal Close) Relay? ==
1960 1960  
2112 +LT-22222-L built-in relay is NO (Normal Open). User can use an external relay to achieve Normal Close purpose. Diagram as below:
2113 +
2114 +[[image:image-20221006170630-1.png||height="610" width="945"]]
2115 +
2116 +
2117 +
2118 +
1961 1961  = 6. Trouble Shooting =
2120 +
2121 +
1962 1962  )))
1963 1963  
1964 1964  (((
... ... @@ -2060,4 +2060,3 @@
2060 2060  * [[Datasheet, Document Base>>https://www.dropbox.com/sh/gxxmgks42tqfr3a/AACEdsj_mqzeoTOXARRlwYZ2a?dl=0]]
2061 2061  * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2062 2062  
2063 -
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