Last modified by Saxer Lin on 2025/04/15 17:24
<
From version < 66.23 >
edited by Xiaoling
on 2022/05/24 13:57
To version < 57.1 >
edited by Xiaoling
on 2022/05/24 10:12
>
Change comment: Uploaded new attachment "1653358355238-883.png", version {1}

Summary

Details

Page properties
Content
... ... @@ -45,114 +45,44 @@
45 45  
46 46  == 1.2  Specifications ==
47 47  
48 -(((
49 49  **Hardware System:**
50 -)))
51 51  
52 -* (((
53 -STM32L072CZT6 MCU
54 -)))
55 -* (((
56 -SX1276/78 Wireless Chip 
57 -)))
58 -* (((
59 -(((
60 -Power Consumption:
61 -)))
50 +* STM32L072CZT6 MCU
51 +* SX1276/78 Wireless Chip 
52 +* Power Consumption:
53 +** Idle: 4mA@12v
54 +** 20dB Transmit: 34mA@12v
62 62  
63 -* (((
64 -Idle: 4mA@12v
65 -)))
66 -* (((
67 -20dB Transmit: 34mA@12v
68 -)))
69 -)))
70 -
71 -(((
72 72  **Interface for Model: LT22222-L:**
73 -)))
74 74  
75 -* (((
76 -2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
77 -)))
78 -* (((
79 -2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
80 -)))
81 -* (((
82 -2 x Relay Output (5A@250VAC / 30VDC)
83 -)))
84 -* (((
85 -2 x 0~~20mA Analog Input (res:0.01mA)
86 -)))
87 -* (((
88 -2 x 0~~30V Analog Input (res:0.01v)
89 -)))
90 -* (((
91 -Power Input 7~~ 24V DC. 
92 -)))
58 +* 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
59 +* 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
60 +* 2 x Relay Output (5A@250VAC / 30VDC)
61 +* 2 x 0~~20mA Analog Input (res:0.01mA)
62 +* 2 x 0~~30V Analog Input (res:0.01v)
63 +* Power Input 7~~ 24V DC. 
93 93  
94 -(((
95 95  **LoRa Spec:**
96 -)))
97 97  
98 -* (((
99 -(((
100 -Frequency Range:
101 -)))
67 +* Frequency Range:
68 +** Band 1 (HF): 862 ~~ 1020 Mhz
69 +** Band 2 (LF): 410 ~~ 528 Mhz
70 +* 168 dB maximum link budget.
71 +* +20 dBm - 100 mW constant RF output vs.
72 +* +14 dBm high efficiency PA.
73 +* Programmable bit rate up to 300 kbps.
74 +* High sensitivity: down to -148 dBm.
75 +* Bullet-proof front end: IIP3 = -12.5 dBm.
76 +* Excellent blocking immunity.
77 +* Low RX current of 10.3 mA, 200 nA register retention.
78 +* Fully integrated synthesizer with a resolution of 61 Hz.
79 +* FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
80 +* Built-in bit synchronizer for clock recovery.
81 +* Preamble detection.
82 +* 127 dB Dynamic Range RSSI.
83 +* Automatic RF Sense and CAD with ultra-fast AFC.
84 +* Packet engine up to 256 bytes with CRC.
102 102  
103 -* (((
104 -Band 1 (HF): 862 ~~ 1020 Mhz
105 -)))
106 -* (((
107 -Band 2 (LF): 410 ~~ 528 Mhz
108 -)))
109 -)))
110 -* (((
111 -168 dB maximum link budget.
112 -)))
113 -* (((
114 -+20 dBm - 100 mW constant RF output vs.
115 -)))
116 -* (((
117 -+14 dBm high efficiency PA.
118 -)))
119 -* (((
120 -Programmable bit rate up to 300 kbps.
121 -)))
122 -* (((
123 -High sensitivity: down to -148 dBm.
124 -)))
125 -* (((
126 -Bullet-proof front end: IIP3 = -12.5 dBm.
127 -)))
128 -* (((
129 -Excellent blocking immunity.
130 -)))
131 -* (((
132 -Low RX current of 10.3 mA, 200 nA register retention.
133 -)))
134 -* (((
135 -Fully integrated synthesizer with a resolution of 61 Hz.
136 -)))
137 -* (((
138 -FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
139 -)))
140 -* (((
141 -Built-in bit synchronizer for clock recovery.
142 -)))
143 -* (((
144 -Preamble detection.
145 -)))
146 -* (((
147 -127 dB Dynamic Range RSSI.
148 -)))
149 -* (((
150 -Automatic RF Sense and CAD with ultra-fast AFC.
151 -)))
152 -* (((
153 -Packet engine up to 256 bytes with CRC.
154 -)))
155 -
156 156  == 1.3 Features ==
157 157  
158 158  * LoRaWAN Class A & Class C protocol
... ... @@ -199,21 +199,13 @@
199 199  
200 200  == 3.1 How it works? ==
201 201  
202 -(((
203 203  The LT is configured as LoRaWAN OTAA Class C mode by default. It has OTAA keys to join network. To connect a local LoRaWAN network, user just need to input the OTAA keys in the network server and power on the LT. It will auto join the network via OTAA. For LT-22222-L, the LED will show the Join status: After power on **TX LED** will fast blink 5 times, LT-22222-L will enter working mode and start to JOIN LoRaWAN network. **TX LED** will be on for 5 seconds after joined in network. When there is message from server, the **RX LED** will be on for 1 second. 
204 -)))
205 205  
206 -(((
207 -In case user can’t set the OTAA keys in the network server and has to use the existing keys from server. User can [[use AT Command>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H4.UseATCommand]] to set the keys in the devices.
208 -)))
134 +In case user can’t set the OTAA keys in the network server and has to use the existing keys from server. User can [[use AT Command>>path:#AT_Command]] to set the keys in the devices.
209 209  
210 -(((
211 211  3.2 Example to join LoRaWAN network
212 -)))
213 213  
214 -(((
215 215  This chapter shows an example for how to join the TTN LoRaWAN Network. Below is the network structure, we use our LG308 as LoRaWAN gateway here. 
216 -)))
217 217  
218 218  [[image:image-20220523172350-1.png||height="266" width="864"]]
219 219  
... ... @@ -313,9 +313,7 @@
313 313  
314 314  **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
315 315  
316 -(((
317 317  Total : 11 bytes payload
318 -)))
319 319  
320 320  [[image:image-20220523180452-3.png]]
321 321  
... ... @@ -329,77 +329,53 @@
329 329  * FIRST: Indicate this is the first packet after join network.
330 330  * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
331 331  
332 -(((
333 333  (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
334 -)))
335 335  
336 -(((
337 337  **To use counting mode, please run:**
338 -)))
339 339  
340 340  (% class="box infomessage" %)
341 341  (((
342 -(((
343 343  **AT+MOD=2**
344 344  )))
345 -)))
346 346  
347 347  (% class="box infomessage" %)
348 348  (((
349 -(((
350 350  **ATZ**
351 351  )))
352 -)))
353 353  
354 -(((
355 355  (% style="color:#4f81bd" %)**AT Commands for counting:**
356 -)))
357 357  
358 -(((
359 359  **For LT22222-L:**
360 -)))
361 361  
362 362  (% class="box infomessage" %)
363 363  (((
364 -(((
365 365  **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
366 366  )))
367 -)))
368 368  
369 369  (% class="box infomessage" %)
370 370  (((
371 -(((
372 372  **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
373 373  )))
374 -)))
375 375  
376 376  (% class="box infomessage" %)
377 377  (((
378 -(((
379 379  **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
380 380  )))
381 -)))
382 382  
383 383  (% class="box infomessage" %)
384 384  (((
385 -(((
386 386  **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
387 387  )))
388 -)))
389 389  
390 390  (% class="box infomessage" %)
391 391  (((
392 -(((
393 393  **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
394 394  )))
395 -)))
396 396  
397 397  (% class="box infomessage" %)
398 398  (((
399 -(((
400 400  **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
401 401  )))
402 -)))
403 403  
404 404  === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
405 405  
... ... @@ -431,7 +431,7 @@
431 431  **ATZ**
432 432  )))
433 433  
434 -Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.2AT2BMOD3D22C28DoubleDICounting29]].
330 +Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:#COUNT_COMMAND]].
435 435  
436 436  === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
437 437  
... ... @@ -466,7 +466,7 @@
466 466  )))
467 467  
468 468  
469 -Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.2AT2BMOD3D22C28DoubleDICounting29]].
365 +Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:#COUNT_COMMAND]].
470 470  
471 471  **Plus below command for AVI1 Counting:**
472 472  
... ... @@ -518,7 +518,7 @@
518 518  **ATZ**
519 519  )))
520 520  
521 -Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.2AT2BMOD3D22C28DoubleDICounting29]].
417 +Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:#COUNT_COMMAND]].
522 522  
523 523  === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
524 524  
... ... @@ -567,7 +567,7 @@
567 567  
568 568  **Downlink Command to set Trigger Condition**
569 569  
570 -Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
466 +Type Code: 0xAA. Downlink command same as AT Command [[AT+AVLIM, AT+ACLIM>>path:#AT_Trigger]]
571 571  
572 572  Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
573 573  
... ... @@ -587,7 +587,7 @@
587 587  
588 588  Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
589 589  
590 -**Example2**: AA 02 01 00
486 +Example2: AA 02 01 00
591 591  
592 592  Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
593 593  
... ... @@ -1147,7 +1147,7 @@
1147 1147  
1148 1148  [[image:image-20220524094641-12.png||height="402" width="718"]]
1149 1149  
1150 -**Step 3**: Create an account or log in Mydevices.
1046 +**Step **3: Create an account or log in Mydevices.
1151 1151  
1152 1152  **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1153 1153  
... ... @@ -1157,6 +1157,7 @@
1157 1157  
1158 1158  After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1159 1159  
1056 +
1160 1160  [[image:image-20220524094909-1.png||height="335" width="729"]]
1161 1161  
1162 1162  [[image:image-20220524094909-2.png||height="337" width="729"]]
... ... @@ -1167,6 +1167,10 @@
1167 1167  
1168 1168  [[image:image-20220524094909-5.png||height="341" width="734"]]
1169 1169  
1067 +
1068 +
1069 +
1070 +
1170 1170  == 3.6 Interface Detail ==
1171 1171  
1172 1172  === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
... ... @@ -1182,10 +1182,8 @@
1182 1182  )))
1183 1183  
1184 1184  (((
1185 -(((
1186 1186  Internal circuit as below, the NEC2501 is a photocoupler, the Active current (from NEC2501 pin 1 to pin 2 is 1ma and the max current is 50mA. When there is active current pass NEC2501 pin1 to pin2. The DI will be active high
1187 1187  )))
1188 -)))
1189 1189  
1190 1190  [[image:1653357170703-587.png]]
1191 1191  
... ... @@ -1217,9 +1217,9 @@
1217 1217  
1218 1218  So when sensor active, the current between NEC2501 pin1 and pin2 is:
1219 1219  
1220 -[[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:/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.**
1119 +[[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png]]** [[image:image-20220524095628-8.png]]= DI1+ / 1K.**
1221 1221  
1222 -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:/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]]** = 24mA , So the LT-22222-L will be able to detect this high active signal.
1121 +If **DI1+ = 24v**, the [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png]]**[[image:image-20220524095628-8.png]]** = 24mA , So the LT-22222-L will be able to detect this high active signal.
1223 1223  
1224 1224  
1225 1225  **Example3**: Connect to a 220v high active sensor.
... ... @@ -1231,9 +1231,9 @@
1231 1231  
1232 1232  So when sensor active, the current between NEC2501 pin1 and pin2 is:
1233 1233  
1234 - [[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:/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.**
1133 + [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png]]**[[image:image-20220524095628-8.png]] = DI1+ / 51K.**
1235 1235  
1236 -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.
1135 +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.
1237 1237  
1238 1238  === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1239 1239  
... ... @@ -1274,10 +1274,12 @@
1274 1274  The LT serial controller has two relay interfaces; each interface uses two pins of the screw terminal. User can connect other device’s Power Line to in serial of RO1_1 and RO_2. Such as below:
1275 1275  )))
1276 1276  
1176 +
1277 1277  [[image:image-20220524100215-9.png]]
1278 1278  
1279 1279  [[image:image-20220524100215-10.png||height="382" width="723"]]
1280 1280  
1181 +
1281 1281  == 3.7 LEDs Indicators ==
1282 1282  
1283 1283  [[image:image-20220524100748-11.png]]
... ... @@ -1288,555 +1288,360 @@
1288 1288  
1289 1289  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.
1290 1290  
1291 -[[image:1653358238933-385.png]]
1192 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
1292 1292  
1293 -In PC, User needs to set (% style="color:#4f81bd" %)**serial tool**(%%)(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to (% style="color:green" %)**9600**(%%) to access to access serial console for LT. The AT commands are disable by default and need to enter password (default:(% style="color:green" %)**123456**)(%%) to active it. As shown below:
1294 1294  
1295 -[[image:1653358355238-883.png]]
1195 +In PC, User needs to set **serial tool**(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to **9600** to access to access serial console for LT. The AT commands are disable by default and need to enter password (default:**123456**) to active it. As shown below:
1296 1296  
1197 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image030.png]]
1198 +
1199 +
1297 1297  More detail AT Command manual can be found at [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1298 1298  
1299 -(((
1300 1300  AT+<CMD>?        : Help on <CMD>
1301 -)))
1302 1302  
1303 -(((
1304 1304  AT+<CMD>         : Run <CMD>
1305 -)))
1306 1306  
1307 -(((
1308 1308  AT+<CMD>=<value> : Set the value
1309 -)))
1310 1310  
1311 -(((
1312 1312  AT+<CMD>=?       : Get the value
1313 -)))
1314 1314  
1315 -(((
1316 1316  ATZ: Trig a reset of the MCU
1317 -)))
1318 1318  
1319 -(((
1320 1320  AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1321 -)))
1322 1322  
1323 -(((
1324 1324  AT+DEUI: Get or Set the Device EUI
1325 -)))
1326 1326  
1327 -(((
1328 1328  AT+DADDR: Get or Set the Device Address
1329 -)))
1330 1330  
1331 -(((
1332 1332  AT+APPKEY: Get or Set the Application Key
1333 -)))
1334 1334  
1335 -(((
1336 1336  AT+NWKSKEY: Get or Set the Network Session Key
1337 -)))
1338 1338  
1339 -(((
1340 1340  AT+APPSKEY: Get or Set the Application Session Key
1341 -)))
1342 1342  
1343 -(((
1344 1344  AT+APPEUI: Get or Set the Application EUI
1345 -)))
1346 1346  
1347 -(((
1348 1348  AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1349 -)))
1350 1350  
1351 -(((
1352 1352  AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1353 -)))
1354 1354  
1355 -(((
1356 1356  AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1357 -)))
1358 1358  
1359 -(((
1360 1360  AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1361 -)))
1362 1362  
1363 -(((
1364 1364  AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1365 -)))
1366 1366  
1367 -(((
1368 1368  AT+RX2FQ: Get or Set the Rx2 window frequency
1369 -)))
1370 1370  
1371 -(((
1372 1372  AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1373 -)))
1374 1374  
1375 -(((
1376 1376  AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1377 -)))
1378 1378  
1379 -(((
1380 1380  AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1381 -)))
1382 1382  
1383 -(((
1384 1384  AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1385 -)))
1386 1386  
1387 -(((
1388 1388  AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1389 -)))
1390 1390  
1391 -(((
1392 1392  AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1393 -)))
1394 1394  
1395 -(((
1396 1396  AT+NWKID: Get or Set the Network ID
1397 -)))
1398 1398  
1399 -(((
1400 1400  AT+FCU: Get or Set the Frame Counter Uplink
1401 -)))
1402 1402  
1403 -(((
1404 1404  AT+FCD: Get or Set the Frame Counter Downlink
1405 -)))
1406 1406  
1407 -(((
1408 1408  AT+CLASS: Get or Set the Device Class
1409 -)))
1410 1410  
1411 -(((
1412 1412  AT+JOIN: Join network
1413 -)))
1414 1414  
1415 -(((
1416 1416  AT+NJS: Get OTAA Join Status
1417 -)))
1418 1418  
1419 -(((
1420 1420  AT+SENDB: Send hexadecimal data along with the application port
1421 -)))
1422 1422  
1423 -(((
1424 1424  AT+SEND: Send text data along with the application port
1425 -)))
1426 1426  
1427 -(((
1428 1428  AT+RECVB: Print last received data in binary format (with hexadecimal values)
1429 -)))
1430 1430  
1431 -(((
1432 1432  AT+RECV: Print last received data in raw format
1433 -)))
1434 1434  
1435 -(((
1436 1436  AT+VER: Get current image version and Frequency Band
1437 -)))
1438 1438  
1439 -(((
1440 1440  AT+CFM: Get or Set the confirmation mode (0-1)
1441 -)))
1442 1442  
1443 -(((
1444 1444  AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1445 -)))
1446 1446  
1447 -(((
1448 1448  AT+SNR: Get the SNR of the last received packet
1449 -)))
1450 1450  
1451 -(((
1452 1452  AT+RSSI: Get the RSSI of the last received packet
1453 -)))
1454 1454  
1455 -(((
1456 1456  AT+TDC: Get or set the application data transmission interval in ms
1457 -)))
1458 1458  
1459 -(((
1460 1460  AT+PORT: Get or set the application port
1461 -)))
1462 1462  
1463 -(((
1464 1464  AT+DISAT: Disable AT commands
1465 -)))
1466 1466  
1467 -(((
1468 1468  AT+PWORD: Set password, max 9 digits
1469 -)))
1470 1470  
1471 -(((
1472 1472  AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1473 -)))
1474 1474  
1475 -(((
1476 1476  AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1477 -)))
1478 1478  
1479 -(((
1480 1480  AT+CFG: Print all settings
1481 -)))
1482 1482  
1483 -== 4.2 Common AT Command Sequence ==
1484 1484  
1485 -=== 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1486 1486  
1487 -(((
1296 +1.
1297 +11. Common AT Command Sequence
1298 +111. Multi-channel ABP mode (Use with SX1301/LG308)
1299 +
1488 1488  If device has not joined network yet:
1489 -)))
1490 1490  
1491 -(((
1492 -(% style="background-color:#dcdcdc" %)123456
1493 -)))
1302 +123456
1494 1494  
1495 -(((
1496 -(% style="background-color:#dcdcdc" %)AT+FDR
1497 -)))
1304 +AT+FDR
1498 1498  
1499 -(((
1500 -(% style="background-color:#dcdcdc" %)123456
1501 -)))
1306 +123456
1502 1502  
1503 -(((
1504 -(% style="background-color:#dcdcdc" %)AT+NJM=0
1505 -)))
1308 +AT+NJM=0
1506 1506  
1507 -(((
1508 -(% style="background-color:#dcdcdc" %)ATZ
1509 -)))
1310 +ATZ
1510 1510  
1511 1511  
1512 -(((
1513 1513  If device already joined network:
1514 -)))
1515 1515  
1516 -(((
1517 -(% style="background-color:#dcdcdc" %)AT+NJM=0
1518 -)))
1315 +AT+NJM=0
1519 1519  
1520 -(((
1521 -(% style="background-color:#dcdcdc" %)ATZ
1522 -)))
1317 +ATZ
1523 1523  
1524 -=== 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1319 +1.
1320 +11.
1321 +111. Single-channel ABP mode (Use with LG01/LG02)
1525 1525  
1526 -(((
1527 -(% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1528 -)))
1323 +123456   Enter Password to have AT access.
1529 1529  
1530 -(((
1531 -(% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1532 -)))
1325 +AT+FDR   Reset Parameters to Factory Default, Keys Reserve
1533 1533  
1534 -(((
1535 -(% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1536 -)))
1327 +123456   Enter Password to have AT access.
1537 1537  
1538 -(((
1539 -(% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1540 -)))
1329 +AT+CLASS=C Set to work in CLASS C
1541 1541  
1542 -(((
1543 -(% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1544 -)))
1331 +AT+NJM=0 Set to ABP mode
1545 1545  
1546 -(((
1547 -(% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1548 -)))
1333 +AT+ADR=0 Set the Adaptive Data Rate Off
1549 1549  
1550 -(((
1551 -(% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1552 -)))
1335 +AT+DR=5  Set Data Rate
1553 1553  
1554 -(((
1555 -(% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1556 -)))
1337 +AT+TDC=60000  Set transmit interval to 60 seconds
1557 1557  
1558 -(((
1559 -(% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1560 -)))
1339 +AT+CHS=868400000 Set transmit frequency to 868.4Mhz
1561 1561  
1562 -(((
1563 -(% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1564 -)))
1341 +AT+RX2FQ=868400000 Set RX2Frequency to 868.4Mhz (according to the result from server)
1565 1565  
1566 -(((
1567 -(% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1568 -)))
1343 +AT+RX2DR=5  Set RX2DR to match the downlink DR from server. see below
1569 1569  
1570 -(((
1571 -(% style="background-color:#dcdcdc" %) AT+DADDR=26 01 1A F1 (%%)Set Device Address to 26 01 1A F1, this ID can be found in the LoRa Server portal.
1572 -)))
1345 +AT+DADDR=26 01 1A F1 Set Device Address to 26 01 1A F1, this ID can be found in the LoRa Server portal.
1573 1573  
1574 -(((
1575 -(% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1576 -)))
1347 +ATZ          Reset MCU
1577 1577  
1578 -(((
1579 -(% style="color:red" %)**Note:**
1580 -)))
1349 +**Note:**
1581 1581  
1582 -(((
1583 -(% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1584 -2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1585 -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.
1586 -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
1587 -)))
1351 +1. Make sure the device is set to ABP mode in the IoT Server.
1352 +1. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1353 +1. 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.
1354 +1. 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
1588 1588  
1589 -(((
1590 -[[image:1653359097980-169.png||height="188" width="729"]]
1591 -)))
1356 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image031.png]]
1592 1592  
1593 -(((
1594 -
1595 -)))
1596 1596  
1597 -=== 4.2.3 Change to Class A ===
1359 +1.
1360 +11.
1361 +111. Change to Class A
1598 1598  
1599 1599  If sensor JOINED
1600 -(% style="background-color:#dcdcdc" %)AT+CLASS=A
1364 +
1365 +AT+CLASS=A
1366 +
1601 1601  ATZ
1602 1602  
1603 -= 5. FAQ =
1604 1604  
1605 -== 5.1 How to upgrade the image? ==
1606 1606  
1371 +
1372 +
1373 +1. FAQ
1374 +
1375 +1.
1376 +11. How to upgrade the image?
1377 +
1607 1607  The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1608 1608  
1609 1609  * Support new features
1610 1610  * For bug fix
1611 1611  * Change LoRaWAN bands.
1383 +
1612 1612  Below shows the hardware connection for how to upload an image to the LT:
1613 -* [[image:1653359603330-121.png]]
1614 1614  
1386 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
1387 +
1388 +
1615 1615  **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]].
1390 +
1616 1616  **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1392 +
1617 1617  **Step3: **Open flashloader; choose the correct COM port to update.
1618 -**For LT-22222-L**:
1619 -Hold down the PRO button and then momentarily press the RST reset button and the **DO1 led** will change from OFF to ON. When **DO1 LED** is on, it means the device is in download mode.
1620 1620  
1621 - [[image:image-20220524103407-12.png]]
1395 +**For LT-33222-L**:
1622 1622  
1623 -[[image:image-20220524103429-13.png]]
1397 +Hold down the PRO button and then momentarily press the RST reset button and the **DO2 led** will change from OFF to ON. When **DO2 LED** is on, it means the device is in download mode.
1624 1624  
1625 -[[image:image-20220524104033-15.png]]
1399 +**For LT-22222-L**:
1626 1626  
1627 -(% 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:
1401 +Hold down the PRO button and then momentarily press the RST reset button and the **DO1 led** will change from OFF to ON. When **DO1 LED** is on, it means the device is in download mode.
1628 1628  
1629 -[[image:1653360054704-518.png||height="186" width="745"]]
1630 1630  
1631 -(((
1632 -(((
1633 -== 5.2 How to change the LoRa Frequency Bands/Region? ==
1634 -)))
1635 -)))
1636 1636  
1637 -(((
1638 -User can follow the introduction for [[how to upgrade image>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H5.1Howtoupgradetheimage3F]]. When download the images, choose the required image file for download.
1405 +|(((
1406 +Board detected
1639 1639  )))
1640 1640  
1641 -(((
1642 -== 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1409 +|(((
1410 +
1643 1643  )))
1644 1644  
1645 -(((
1646 -(((
1413 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image032.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image033.png]]
1414 +
1415 +
1416 +
1417 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image034.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image035.png]]
1418 +
1419 +
1420 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image036.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image037.png]]
1421 +
1422 +
1423 +**Notice**: In case user has lost the program cable. User can hand made one from a 3.5mm cable. The pin mapping is:
1424 +
1425 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image038.png]]
1426 +
1427 +
1428 +1.
1429 +11. How to change the LoRa Frequency Bands/Region?
1430 +
1431 +User can follow the introduction for [[how to upgrade image>>path:#upgrade_image]]. When download the images, choose the required image file for download.
1432 +
1433 +
1434 +1.
1435 +11. How to set up LT to work with Single Channel Gateway such as LG01/LG02?
1436 +
1647 1647  In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1648 -)))
1649 -)))
1650 1650  
1651 -(((
1652 -(((
1653 1653  Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1654 -)))
1655 -)))
1656 1656  
1657 -(((
1658 -(% style="color:#4f81bd" %)**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.
1659 -)))
1660 1660  
1661 -(((
1662 -[[image:1653360231087-571.png||height="401" width="727"]]
1663 -)))
1442 +**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.
1664 1664  
1665 -(% style="color:red" %)Note: user just need to make sure above three keys match, User can change either in TTN or Device to make then match. In TTN, NETSKEY and APPSKEY can be configured by user in setting page, but Device Addr is generated by TTN.
1444 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image039.png]]
1666 1666  
1667 -(% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1446 +Note: user just need to make sure above three keys match, User can change either in TTN or Device to make then match. In TTN, NETSKEY and APPSKEY can be configured by user in setting page, but Device Addr is generated by TTN.
1668 1668  
1669 -(% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1670 -(% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1671 -(% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1672 -(% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1673 -(% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1674 -(% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1675 -(% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1676 -(% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1677 -(% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1678 -(% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1679 1679  
1449 +**Step2: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1450 +
1451 +123456   Enter Password to have AT access.
1452 +
1453 +AT+FDR   Reset Parameters to Factory Default, Keys Reserve
1454 +
1455 +123456   Enter Password to have AT access.
1456 +
1457 +AT+NJM=0 Set to ABP mode
1458 +
1459 +AT+ADR=0 Set the Adaptive Data Rate Off
1460 +
1461 +AT+DR=5  Set Data Rate (Set AT+DR=3 for 915 band)
1462 +
1463 +AT+TDC=60000  Set transmit interval to 60 seconds
1464 +
1465 +AT+CHS=868400000 Set transmit frequency to 868.4Mhz
1466 +
1467 +AT+DADDR=26 01 1A F1 Set Device Address to 26 01 1A F1
1468 +
1469 +ATZ                Reset MCU
1470 +
1680 1680  As shown in below:
1681 1681  
1682 -[[image:1653360498588-932.png||height="485" width="726"]]
1473 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image040.png]]
1683 1683  
1684 -== 5.4 Can I see counting event in Serial? ==
1685 1685  
1686 -(((
1476 +
1477 +1.
1478 +11. Can I see counting event in Serial?
1479 +
1687 1687  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.
1688 -)))
1689 1689  
1690 -(((
1691 -= 6. Trouble Shooting =
1692 -)))
1693 1693  
1694 -(((
1695 -(((
1696 -== 6.1 Downlink doesn’t work, how to solve it? ==
1697 -)))
1698 -)))
1699 1699  
1700 -(((
1701 -Please see this link for how to debug:
1702 1702  
1703 -[[http:~~/~~/8.211.40.43:8080/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/>>http://8.211.40.43:8080/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/]]
1704 -)))
1485 +1. Trouble Shooting     
1486 +11. Downlink doesn’t work, how to solve it?
1705 1705  
1706 -(((
1488 +Please see this link for how to debug:
1489 +
1707 1707  [[http:~~/~~/wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#How_it_work>>url:http://wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#How_it_work]]
1708 -)))
1709 1709  
1710 -(((
1711 -== 6.2 Have trouble to upload image. ==
1712 -)))
1713 1713  
1714 -(((
1493 +1.
1494 +11. Have trouble to upload image.
1495 +
1715 1715  See this link for trouble shooting:
1716 -)))
1717 1717  
1718 -(((
1719 1719  [[http:~~/~~/wiki.dragino.com/index.php?title=Firmware_Upgrade_Trouble_Shooting#UART_upgrade_trouble_shooting>>url:http://wiki.dragino.com/index.php?title=Firmware_Upgrade_Trouble_Shooting#UART_upgrade_trouble_shooting]]
1720 -)))
1721 1721  
1722 -(((
1723 -== 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1724 -)))
1725 1725  
1726 -(((
1501 +1.
1502 +11. Why I can’t join TTN in US915 /AU915 bands?
1503 +
1727 1727  It might be about the channels mapping. Please see this link for detail:
1728 -)))
1729 1729  
1730 -(((
1731 1731  [[http:~~/~~/wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#Notice_of_US915.2FCN470.2FAU915_Frequency_band>>url:http://wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#Notice_of_US915.2FCN470.2FAU915_Frequency_band]]
1732 -)))
1733 1733  
1734 -(((
1735 -= 7. Order Info =
1736 -)))
1737 1737  
1738 -(((
1739 -(((
1740 -(% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1741 -)))
1742 -)))
1743 1743  
1744 -(((
1745 -(((
1746 -(% style="color:#4f81bd" %)**XXX:**
1747 -)))
1748 -)))
1749 1749  
1750 -* (((
1751 -(% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1752 -)))
1753 -* (((
1754 -(% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1755 -)))
1756 -* (((
1757 -(% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1758 -)))
1759 -* (((
1760 -(% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1761 -)))
1762 -* (((
1763 -(% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1764 -)))
1765 -* (((
1766 -(% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1767 -)))
1768 -* (((
1769 -(% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1770 -)))
1771 -* (((
1772 -(% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1773 -)))
1511 +1. Order Info
1774 1774  
1775 -(((
1776 -* (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1513 +**For LT-33222-L-XXX or LT-22222-L-XXX:**
1777 1777  
1778 -= 8. Packing Info =
1779 -)))
1515 +**XXX:**
1780 1780  
1781 -(((
1782 -(((
1517 +* **EU433**: LT with frequency bands EU433
1518 +* **EU868**: LT with frequency bands EU868
1519 +* **KR920**: LT with frequency bands KR920
1520 +* **CN470**: LT with frequency bands CN470
1521 +* **AS923**: LT with frequency bands AS923
1522 +* **AU915**: LT with frequency bands AU915
1523 +* **US915**: LT with frequency bands US915
1524 +* **IN865**: LT with frequency bands IN865
1525 +* **CN779**: LT with frequency bands CN779
1526 +
1527 +1. Packing Info
1528 +
1783 1783  **Package Includes**:
1784 -)))
1785 -)))
1786 1786  
1787 -(((
1788 -(((
1789 -* LT-22222-L I/O Controller x 1
1531 +* LT I/O Controller x 1
1790 1790  * Stick Antenna for LoRa RF part x 1
1791 1791  * Bracket for controller x1
1792 1792  * Program cable x 1
1793 -)))
1794 -)))
1795 1795  
1796 -(((
1797 -(((
1798 1798  **Dimension and weight**:
1799 -)))
1800 -)))
1801 1801  
1802 -(((
1803 -(((
1804 1804  * Device Size: 13.5 x 7 x 3 cm
1805 1805  * Device Weight: 105g
1806 1806  * Package Size / pcs : 14.5 x 8 x 5 cm
1807 1807  * Weight / pcs : 170g
1808 -)))
1809 -)))
1810 1810  
1811 -(((
1812 -= 9. Support =
1813 -)))
1543 +1. Support
1814 1814  
1815 -* (((
1816 -(((
1817 -Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
1818 -)))
1819 -)))
1820 -* (((
1821 -(((
1822 -Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to
1823 -)))
1824 -)))
1545 +* Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
1546 +* Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to
1825 1825  
1826 -(((
1827 -(((
1828 - [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
1829 -)))
1830 -
1831 -(((
1832 -= 10. Reference​​​​​ =
1833 -
1834 -* Product Page:
1835 -
1836 -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]]
1837 -
1838 -* [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
1839 -* [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1840 -* [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
1841 -)))
1842 -)))
1548 +[[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
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