Last modified by Saxer Lin on 2025/04/15 17:24
<
From version < 48.1 >
edited by Xiaoling
on 2022/05/24 09:56
To version < 57.2 >
edited by Xiaoling
on 2022/05/24 10:14
>
Change comment: There is no comment for this version

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... ... @@ -1100,11 +1100,11 @@
1100 1100  * Connect sensor’s output to DI1-
1101 1101  * Connect sensor’s VCC to DI1+.
1102 1102  
1103 -So when sensor active, the current between NEC2501 pin1 and pin2 is:
1103 +So when sensor active, the current between NEC2501 pin1 and pin2 is： ​​
1104 1104  
1105 - //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.
1105 + //IF// = DI1+ / 1K.
1106 1106  
1107 -If DI1+ = 12v, the //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image022.png]] = 12mA , So the LT-22222-L will be able to detect this active signal.
1107 +If DI1+ = 12v, the //IF// = 12mA , So the LT-22222-L will be able to detect this active signal.
1108 1108  
1109 1109  
1110 1110  **Example2**: Connect to a High active sensor.
... ... @@ -1116,12 +1116,12 @@
1116 1116  
1117 1117  So when sensor active, the current between NEC2501 pin1 and pin2 is:
1118 1118  
1119 - //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.
1119 +[[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/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.**
1120 1120  
1121 -If DI1+ = 24v, the //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image022.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:/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.
1122 1122  
1123 1123  
1124 -**Example3**: Connect to a 220v high active sensor.公司测试一下
1124 +**Example3**: Connect to a 220v high active sensor.
1125 1125  
1126 1126  Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1127 1127  
... ... @@ -1130,34 +1130,24 @@
1130 1130  
1131 1131  So when sensor active, the current between NEC2501 pin1 and pin2 is:
1132 1132  
1133 - //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 51K.
1133 + [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/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.**
1134 1134  
1135 -If sensor output is 220v, the //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image022.png]] = 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.
1136 1136  
1137 +=== 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1137 1137  
1138 -1.
1139 -11.
1140 -111. Digital Output Port: DO1/DO2 /DO3
1141 -
1142 1142  NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1143 1143  
1144 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]
1141 +[[image:1653357531600-905.png]]
1145 1145  
1143 +=== 3.6.4 Analog Input Interface ===
1146 1146  
1147 -
1148 -
1149 -1.
1150 -11.
1151 -111. Analog Input Interface
1152 -
1153 1153  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:
1154 1154  
1155 -AC2 = (IN2 voltage )/12
1147 +**AC2 = (IN2 voltage )/12**
1156 1156  
1157 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image024.png]]
1149 +[[image:1653357592296-182.png]]
1158 1158  
1159 -
1160 -
1161 1161  Example to connect a 4~~20mA sensor
1162 1162  
1163 1163  We take the wind speed sensor as an example for reference only.
... ... @@ -1173,174 +1173,225 @@
1173 1173  
1174 1174  Connection diagram:
1175 1175  
1176 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image025.jpg]]
1166 +[[image:1653357640609-758.png]]
1177 1177  
1178 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image026.png]]
1168 +[[image:1653357648330-671.png||height="155" width="733"]]
1179 1179  
1170 +=== 3.6.5 Relay Output ===
1180 1180  
1181 -
1182 -1.
1183 -11.
1184 -111. Relay Output
1185 -
1172 +(((
1186 1186  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:
1174 +)))
1187 1187  
1188 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image027.png]]
1176 +[[image:image-20220524100215-9.png]]
1189 1189  
1178 +[[image:image-20220524100215-10.png||height="382" width="723"]]
1190 1190  
1191 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image028.png]]
1180 +== 3.7 LEDs Indicators ==
1192 1192  
1182 +[[image:image-20220524100748-11.png]]
1193 1193  
1184 += 4. Use AT Command =
1194 1194  
1186 +== 4.1 Access AT Command ==
1195 1195  
1196 -
1197 -1.
1198 -11. LEDs Indicators
1199 -
1200 -(% border="1" style="background-color:#f7faff" %)
1201 -|**LEDs**|**Feature**
1202 -|**PWR**|Always on if there is power
1203 -|**SYS**|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.
1204 -|**TX**|(((
1205 -Device boot: TX blinks 5 times.
1206 -
1207 -Successful join network: TX ON for 5 seconds.
1208 -
1209 -Transmit a LoRa packet: TX blinks once
1210 -)))
1211 -|**RX**|RX blinks once when receive a packet.
1212 -|**DO1**|
1213 -|**DO2**|
1214 -|**DO3**|
1215 -|**DI2**|(((
1216 -For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1217 -
1218 -For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1219 -)))
1220 -|**DI2**|(((
1221 -For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1222 -
1223 -For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1224 -)))
1225 -|**DI3**|For LT-33222-L ONLY: ON when DI3 is low, LOW when DI3 is high
1226 -|**DI2**|(((
1227 -For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1228 -
1229 -For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1230 -)))
1231 -|**RO1**|
1232 -|**RO2**|
1233 -
1234 -1. Use AT Command
1235 -11. Access AT Command
1236 -
1237 1237  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.
1238 1238  
1239 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
1190 +[[image:1653358238933-385.png]]
1240 1240  
1192 +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:
1241 1241  
1242 -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:
1194 +[[image:1653358355238-883.png]]
1243 1243  
1244 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image030.png]]
1245 -
1246 -
1247 1247  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/]]
1248 1248  
1198 +(((
1249 1249  AT+<CMD>?        : Help on <CMD>
1200 +)))
1250 1250  
1202 +(((
1251 1251  AT+<CMD>         : Run <CMD>
1204 +)))
1252 1252  
1206 +(((
1253 1253  AT+<CMD>=<value> : Set the value
1208 +)))
1254 1254  
1210 +(((
1255 1255  AT+<CMD>=?       : Get the value
1212 +)))
1256 1256  
1214 +(((
1257 1257  ATZ: Trig a reset of the MCU
1216 +)))
1258 1258  
1218 +(((
1259 1259  AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1220 +)))
1260 1260  
1222 +(((
1261 1261  AT+DEUI: Get or Set the Device EUI
1224 +)))
1262 1262  
1226 +(((
1263 1263  AT+DADDR: Get or Set the Device Address
1228 +)))
1264 1264  
1230 +(((
1265 1265  AT+APPKEY: Get or Set the Application Key
1232 +)))
1266 1266  
1234 +(((
1267 1267  AT+NWKSKEY: Get or Set the Network Session Key
1236 +)))
1268 1268  
1238 +(((
1269 1269  AT+APPSKEY: Get or Set the Application Session Key
1240 +)))
1270 1270  
1242 +(((
1271 1271  AT+APPEUI: Get or Set the Application EUI
1244 +)))
1272 1272  
1246 +(((
1273 1273  AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1248 +)))
1274 1274  
1250 +(((
1275 1275  AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1252 +)))
1276 1276  
1254 +(((
1277 1277  AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1256 +)))
1278 1278  
1258 +(((
1279 1279  AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1260 +)))
1280 1280  
1262 +(((
1281 1281  AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1264 +)))
1282 1282  
1266 +(((
1283 1283  AT+RX2FQ: Get or Set the Rx2 window frequency
1268 +)))
1284 1284  
1270 +(((
1285 1285  AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1272 +)))
1286 1286  
1274 +(((
1287 1287  AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1276 +)))
1288 1288  
1278 +(((
1289 1289  AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1280 +)))
1290 1290  
1282 +(((
1291 1291  AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1284 +)))
1292 1292  
1286 +(((
1293 1293  AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1288 +)))
1294 1294  
1290 +(((
1295 1295  AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1292 +)))
1296 1296  
1294 +(((
1297 1297  AT+NWKID: Get or Set the Network ID
1296 +)))
1298 1298  
1298 +(((
1299 1299  AT+FCU: Get or Set the Frame Counter Uplink
1300 +)))
1300 1300  
1302 +(((
1301 1301  AT+FCD: Get or Set the Frame Counter Downlink
1304 +)))
1302 1302  
1306 +(((
1303 1303  AT+CLASS: Get or Set the Device Class
1308 +)))
1304 1304  
1310 +(((
1305 1305  AT+JOIN: Join network
1312 +)))
1306 1306  
1314 +(((
1307 1307  AT+NJS: Get OTAA Join Status
1316 +)))
1308 1308  
1318 +(((
1309 1309  AT+SENDB: Send hexadecimal data along with the application port
1320 +)))
1310 1310  
1322 +(((
1311 1311  AT+SEND: Send text data along with the application port
1324 +)))
1312 1312  
1326 +(((
1313 1313  AT+RECVB: Print last received data in binary format (with hexadecimal values)
1328 +)))
1314 1314  
1330 +(((
1315 1315  AT+RECV: Print last received data in raw format
1332 +)))
1316 1316  
1334 +(((
1317 1317  AT+VER: Get current image version and Frequency Band
1336 +)))
1318 1318  
1338 +(((
1319 1319  AT+CFM: Get or Set the confirmation mode (0-1)
1340 +)))
1320 1320  
1342 +(((
1321 1321  AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1344 +)))
1322 1322  
1346 +(((
1323 1323  AT+SNR: Get the SNR of the last received packet
1348 +)))
1324 1324  
1350 +(((
1325 1325  AT+RSSI: Get the RSSI of the last received packet
1352 +)))
1326 1326  
1354 +(((
1327 1327  AT+TDC: Get or set the application data transmission interval in ms
1356 +)))
1328 1328  
1358 +(((
1329 1329  AT+PORT: Get or set the application port
1360 +)))
1330 1330  
1362 +(((
1331 1331  AT+DISAT: Disable AT commands
1364 +)))
1332 1332  
1366 +(((
1333 1333  AT+PWORD: Set password, max 9 digits
1368 +)))
1334 1334  
1370 +(((
1335 1335  AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1372 +)))
1336 1336  
1374 +(((
1337 1337  AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1376 +)))
1338 1338  
1378 +(((
1339 1339  AT+CFG: Print all settings
1380 +)))
1340 1340  
1341 1341  
1342 1342  
1343 -1.
1384 +1.
1344 1344  11. Common AT Command Sequence
1345 1345  111. Multi-channel ABP mode (Use with SX1301/LG308)
1346 1346  
... ... @@ -1363,8 +1363,8 @@
1363 1363  
1364 1364  ATZ
1365 1365  
1366 -1.
1367 -11.
1407 +1.
1408 +11.
1368 1368  111. Single-channel ABP mode (Use with LG01/LG02)
1369 1369  
1370 1370  123456   Enter Password to have AT access.
... ... @@ -1404,7 +1404,7 @@
1404 1404  
1405 1405  
1406 1406  1.
1407 -11.
1448 +11.
1408 1408  111. Change to Class A
1409 1409  
1410 1410  If sensor JOINED
... ... @@ -1419,7 +1419,7 @@
1419 1419  
1420 1420  1. FAQ
1421 1421  
1422 -1.
1463 +1.
1423 1423  11. How to upgrade the image?
1424 1424  
1425 1425  The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
... ... @@ -1478,7 +1478,7 @@
1478 1478  User can follow the introduction for [[how to upgrade image>>path:#upgrade_image]]. When download the images, choose the required image file for download.
1479 1479  
1480 1480  
1481 -1.
1522 +1.
1482 1482  11. How to set up LT to work with Single Channel Gateway such as LG01/LG02?
1483 1483  
1484 1484  In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
... ... @@ -1537,7 +1537,7 @@
1537 1537  [[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]]
1538 1538  
1539 1539  
1540 -1.
1581 +1.
1541 1541  11. Have trouble to upload image.
1542 1542  
1543 1543  See this link for trouble shooting:
... ... @@ -1545,7 +1545,7 @@
1545 1545  [[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]]
1546 1546  
1547 1547  
1548 -1.
1589 +1.
1549 1549  11. Why I can’t join TTN in US915 /AU915 bands?
1550 1550  
1551 1551  It might be about the channels mapping. Please see this link for detail:
1653357531600-905.png
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