Last modified by Saxer Lin on 2025/04/15 17:24
<
From version < 44.2 >
edited by Xiaoling
on 2022/05/24 09:50
To version < 57.4 >
edited by Xiaoling
on 2022/05/24 10:24
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... ... @@ -1051,29 +1051,23 @@
1051 1051  
1052 1052  [[image:1653356838789-523.png||height="337" width="740"]]
1053 1053  
1054 -
1055 1055  After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1056 1056  
1057 1057  
1058 -[[image:image-20220524094909-1.png]]
1057 +[[image:image-20220524094909-1.png||height="335" width="729"]]
1059 1059  
1059 +[[image:image-20220524094909-2.png||height="337" width="729"]]
1060 1060  
1061 -[[image:image-20220524094909-2.png]]
1061 +[[image:image-20220524094909-3.png||height="338" width="727"]]
1062 1062  
1063 +[[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1063 1063  
1064 -[[image:image-20220524094909-3.png]]
1065 +[[image:image-20220524094909-5.png||height="341" width="734"]]
1065 1065  
1066 1066  
1067 -[[image:image-20220524094909-4.png]]
1068 1068  
1069 1069  
1070 -[[image:image-20220524094909-5.png]]
1071 1071  
1072 -
1073 -
1074 -
1075 -
1076 -
1077 1077  == 3.6 Interface Detail ==
1078 1078  
1079 1079  === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
... ... @@ -1082,19 +1082,21 @@
1082 1082  
1083 1083  [[image:1653356991268-289.png]]
1084 1084  
1079 +=== 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1085 1085  
1086 -
1087 -1.
1088 -11.
1089 -111. Digital Input Port: DI1/DI2 ( For LT-22222-L)
1090 -
1081 +(((
1091 1091  The DI port of LT-22222-L can support NPN or PNP output sensor.
1083 +)))
1092 1092  
1085 +(((
1093 1093  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
1087 +)))
1094 1094  
1095 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image020.png]]
1089 +[[image:1653357170703-587.png]]
1096 1096  
1091 +(((
1097 1097  When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1093 +)))
1098 1098  
1099 1099  
1100 1100  **Example1**: Connect to a Low active sensor.
... ... @@ -1104,11 +1104,11 @@
1104 1104  * Connect sensor’s output to DI1-
1105 1105  * Connect sensor’s VCC to DI1+.
1106 1106  
1107 -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： ​​
1108 1108  
1109 - //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.
1105 + //IF// = DI1+ / 1K.
1110 1110  
1111 -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.
1112 1112  
1113 1113  
1114 1114  **Example2**: Connect to a High active sensor.
... ... @@ -1120,12 +1120,12 @@
1120 1120  
1121 1121  So when sensor active, the current between NEC2501 pin1 and pin2 is:
1122 1122  
1123 - //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:/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.**
1124 1124  
1125 -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:/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.
1126 1126  
1127 1127  
1128 -**Example3**: Connect to a 220v high active sensor.公司测试一下
1124 +**Example3**: Connect to a 220v high active sensor.
1129 1129  
1130 1130  Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1131 1131  
... ... @@ -1134,34 +1134,24 @@
1134 1134  
1135 1135  So when sensor active, the current between NEC2501 pin1 and pin2 is:
1136 1136  
1137 - //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:/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.**
1138 1138  
1139 -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.
1140 1140  
1137 +=== 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1141 1141  
1142 -1.
1143 -11.
1144 -111. Digital Output Port: DO1/DO2 /DO3
1145 -
1146 1146  NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1147 1147  
1148 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]
1141 +[[image:1653357531600-905.png]]
1149 1149  
1143 +=== 3.6.4 Analog Input Interface ===
1150 1150  
1151 -
1152 -
1153 -1.
1154 -11.
1155 -111. Analog Input Interface
1156 -
1157 1157  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:
1158 1158  
1159 -AC2 = (IN2 voltage )/12
1147 +**AC2 = (IN2 voltage )/12**
1160 1160  
1161 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image024.png]]
1149 +[[image:1653357592296-182.png]]
1162 1162  
1163 -
1164 -
1165 1165  Example to connect a 4~~20mA sensor
1166 1166  
1167 1167  We take the wind speed sensor as an example for reference only.
... ... @@ -1177,232 +1177,279 @@
1177 1177  
1178 1178  Connection diagram:
1179 1179  
1180 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image025.jpg]]
1166 +[[image:1653357640609-758.png]]
1181 1181  
1182 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image026.png]]
1168 +[[image:1653357648330-671.png||height="155" width="733"]]
1183 1183  
1170 +=== 3.6.5 Relay Output ===
1184 1184  
1185 -
1186 -1.
1187 -11.
1188 -111. Relay Output
1189 -
1172 +(((
1190 1190  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 +)))
1191 1191  
1192 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image027.png]]
1176 +[[image:image-20220524100215-9.png]]
1193 1193  
1178 +[[image:image-20220524100215-10.png||height="382" width="723"]]
1194 1194  
1195 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image028.png]]
1180 +== 3.7 LEDs Indicators ==
1196 1196  
1182 +[[image:image-20220524100748-11.png]]
1197 1197  
1184 += 4. Use AT Command =
1198 1198  
1186 +== 4.1 Access AT Command ==
1199 1199  
1200 -
1201 -1.
1202 -11. LEDs Indicators
1203 -
1204 -(% border="1" style="background-color:#f7faff" %)
1205 -|**LEDs**|**Feature**
1206 -|**PWR**|Always on if there is power
1207 -|**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.
1208 -|**TX**|(((
1209 -Device boot: TX blinks 5 times.
1210 -
1211 -Successful join network: TX ON for 5 seconds.
1212 -
1213 -Transmit a LoRa packet: TX blinks once
1214 -)))
1215 -|**RX**|RX blinks once when receive a packet.
1216 -|**DO1**|
1217 -|**DO2**|
1218 -|**DO3**|
1219 -|**DI2**|(((
1220 -For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1221 -
1222 -For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1223 -)))
1224 -|**DI2**|(((
1225 -For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1226 -
1227 -For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1228 -)))
1229 -|**DI3**|For LT-33222-L ONLY: ON when DI3 is low, LOW when DI3 is high
1230 -|**DI2**|(((
1231 -For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1232 -
1233 -For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1234 -)))
1235 -|**RO1**|
1236 -|**RO2**|
1237 -
1238 -1. Use AT Command
1239 -11. Access AT Command
1240 -
1241 1241  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.
1242 1242  
1243 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
1190 +[[image:1653358238933-385.png]]
1244 1244  
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:
1245 1245  
1246 -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]]
1247 1247  
1248 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image030.png]]
1249 -
1250 -
1251 1251  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/]]
1252 1252  
1198 +(((
1253 1253  AT+<CMD>?        : Help on <CMD>
1200 +)))
1254 1254  
1202 +(((
1255 1255  AT+<CMD>         : Run <CMD>
1204 +)))
1256 1256  
1206 +(((
1257 1257  AT+<CMD>=<value> : Set the value
1208 +)))
1258 1258  
1210 +(((
1259 1259  AT+<CMD>=?       : Get the value
1212 +)))
1260 1260  
1214 +(((
1261 1261  ATZ: Trig a reset of the MCU
1216 +)))
1262 1262  
1218 +(((
1263 1263  AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1220 +)))
1264 1264  
1222 +(((
1265 1265  AT+DEUI: Get or Set the Device EUI
1224 +)))
1266 1266  
1226 +(((
1267 1267  AT+DADDR: Get or Set the Device Address
1228 +)))
1268 1268  
1230 +(((
1269 1269  AT+APPKEY: Get or Set the Application Key
1232 +)))
1270 1270  
1234 +(((
1271 1271  AT+NWKSKEY: Get or Set the Network Session Key
1236 +)))
1272 1272  
1238 +(((
1273 1273  AT+APPSKEY: Get or Set the Application Session Key
1240 +)))
1274 1274  
1242 +(((
1275 1275  AT+APPEUI: Get or Set the Application EUI
1244 +)))
1276 1276  
1246 +(((
1277 1277  AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1248 +)))
1278 1278  
1250 +(((
1279 1279  AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1252 +)))
1280 1280  
1254 +(((
1281 1281  AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1256 +)))
1282 1282  
1258 +(((
1283 1283  AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1260 +)))
1284 1284  
1262 +(((
1285 1285  AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1264 +)))
1286 1286  
1266 +(((
1287 1287  AT+RX2FQ: Get or Set the Rx2 window frequency
1268 +)))
1288 1288  
1270 +(((
1289 1289  AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1272 +)))
1290 1290  
1274 +(((
1291 1291  AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1276 +)))
1292 1292  
1278 +(((
1293 1293  AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1280 +)))
1294 1294  
1282 +(((
1295 1295  AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1284 +)))
1296 1296  
1286 +(((
1297 1297  AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1288 +)))
1298 1298  
1290 +(((
1299 1299  AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1292 +)))
1300 1300  
1294 +(((
1301 1301  AT+NWKID: Get or Set the Network ID
1296 +)))
1302 1302  
1298 +(((
1303 1303  AT+FCU: Get or Set the Frame Counter Uplink
1300 +)))
1304 1304  
1302 +(((
1305 1305  AT+FCD: Get or Set the Frame Counter Downlink
1304 +)))
1306 1306  
1306 +(((
1307 1307  AT+CLASS: Get or Set the Device Class
1308 +)))
1308 1308  
1310 +(((
1309 1309  AT+JOIN: Join network
1312 +)))
1310 1310  
1314 +(((
1311 1311  AT+NJS: Get OTAA Join Status
1316 +)))
1312 1312  
1318 +(((
1313 1313  AT+SENDB: Send hexadecimal data along with the application port
1320 +)))
1314 1314  
1322 +(((
1315 1315  AT+SEND: Send text data along with the application port
1324 +)))
1316 1316  
1326 +(((
1317 1317  AT+RECVB: Print last received data in binary format (with hexadecimal values)
1328 +)))
1318 1318  
1330 +(((
1319 1319  AT+RECV: Print last received data in raw format
1332 +)))
1320 1320  
1334 +(((
1321 1321  AT+VER: Get current image version and Frequency Band
1336 +)))
1322 1322  
1338 +(((
1323 1323  AT+CFM: Get or Set the confirmation mode (0-1)
1340 +)))
1324 1324  
1342 +(((
1325 1325  AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1344 +)))
1326 1326  
1346 +(((
1327 1327  AT+SNR: Get the SNR of the last received packet
1348 +)))
1328 1328  
1350 +(((
1329 1329  AT+RSSI: Get the RSSI of the last received packet
1352 +)))
1330 1330  
1354 +(((
1331 1331  AT+TDC: Get or set the application data transmission interval in ms
1356 +)))
1332 1332  
1358 +(((
1333 1333  AT+PORT: Get or set the application port
1360 +)))
1334 1334  
1362 +(((
1335 1335  AT+DISAT: Disable AT commands
1364 +)))
1336 1336  
1366 +(((
1337 1337  AT+PWORD: Set password, max 9 digits
1368 +)))
1338 1338  
1370 +(((
1339 1339  AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1372 +)))
1340 1340  
1374 +(((
1341 1341  AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1376 +)))
1342 1342  
1378 +(((
1343 1343  AT+CFG: Print all settings
1380 +)))
1344 1344  
1382 +== 4.2 Common AT Command Sequence ==
1345 1345  
1384 +=== 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1346 1346  
1347 -1.
1348 -11. Common AT Command Sequence
1349 -111. Multi-channel ABP mode (Use with SX1301/LG308)
1350 -
1351 1351  If device has not joined network yet:
1352 1352  
1353 -123456
1388 +(% style="background-color:#dcdcdc" %)123456
1354 1354  
1355 -AT+FDR
1390 +(% style="background-color:#dcdcdc" %)AT+FDR
1356 1356  
1357 -123456
1392 +(% style="background-color:#dcdcdc" %)123456
1358 1358  
1359 -AT+NJM=0
1394 +(% style="background-color:#dcdcdc" %)AT+NJM=0
1360 1360  
1361 -ATZ
1396 +(% style="background-color:#dcdcdc" %)ATZ
1362 1362  
1363 1363  
1364 1364  If device already joined network:
1365 1365  
1366 -AT+NJM=0
1401 +(% style="background-color:#dcdcdc" %)AT+NJM=0
1367 1367  
1368 -ATZ
1403 +(% style="background-color:#dcdcdc" %)ATZ
1369 1369  
1370 -1.
1371 -11.
1372 -111. Single-channel ABP mode (Use with LG01/LG02)
1405 +=== 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1373 1373  
1374 -123456   Enter Password to have AT access.
1407 +(% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1375 1375  
1376 -AT+FDR   Reset Parameters to Factory Default, Keys Reserve
1409 +(% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1377 1377  
1378 -123456   Enter Password to have AT access.
1411 +(% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1379 1379  
1380 -AT+CLASS=C Set to work in CLASS C
1413 +(% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1381 1381  
1382 -AT+NJM=0 Set to ABP mode
1415 +(% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1383 1383  
1384 -AT+ADR=0 Set the Adaptive Data Rate Off
1417 +(% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1385 1385  
1386 -AT+DR=5  Set Data Rate
1419 +(% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1387 1387  
1388 -AT+TDC=60000  Set transmit interval to 60 seconds
1421 +(% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1389 1389  
1390 -AT+CHS=868400000 Set transmit frequency to 868.4Mhz
1423 +(% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1391 1391  
1392 -AT+RX2FQ=868400000 Set RX2Frequency to 868.4Mhz (according to the result from server)
1425 +(% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1393 1393  
1394 -AT+RX2DR=5  Set RX2DR to match the downlink DR from server. see below
1427 +(% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1395 1395  
1396 -AT+DADDR=26 01 1A F1 Set Device Address to 26 01 1A F1, this ID can be found in the LoRa Server portal.
1429 +(% 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.
1397 1397  
1398 -ATZ          Reset MCU
1431 +(% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1399 1399  
1400 -**Note:**
1433 +(% style="color:red" %)**Note:**
1401 1401  
1402 -1. Make sure the device is set to ABP mode in the IoT Server.
1403 -1. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1404 -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.
1405 -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
1435 +(% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1436 +2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1437 +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.
1438 +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
1406 1406  
1407 1407  [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image031.png]]
1408 1408  
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