Last modified by Saxer Lin on 2025/04/15 17:24
<
From version < 44.3 >
edited by Xiaoling
on 2022/05/24 09:51
To version < 58.1 >
edited by Xiaoling
on 2022/05/24 10:24
>
Change comment: Uploaded new attachment "1653359097980-169.png", version {1}

Summary

Details

Page properties
Content
... ... @@ -1051,23 +1051,17 @@
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]]
1062 -
1063 -
1064 1064  [[image:image-20220524094909-3.png||height="338" width="727"]]
1065 1065  
1063 +[[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1066 1066  
1067 -[[image:image-20220524094909-4.png||height="339" width="728"]]
1068 -
1069 -(% style="display:none" %) (%%)
1070 -
1071 1071  [[image:image-20220524094909-5.png||height="341" width="734"]]
1072 1072  
1073 1073  
... ... @@ -1074,7 +1074,6 @@
1074 1074  
1075 1075  
1076 1076  
1077 -
1078 1078  == 3.6 Interface Detail ==
1079 1079  
1080 1080  === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
... ... @@ -1083,19 +1083,21 @@
1083 1083  
1084 1084  [[image:1653356991268-289.png]]
1085 1085  
1079 +=== 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1086 1086  
1087 -
1088 -1.
1089 -11.
1090 -111. Digital Input Port: DI1/DI2 ( For LT-22222-L)
1091 -
1081 +(((
1092 1092  The DI port of LT-22222-L can support NPN or PNP output sensor.
1083 +)))
1093 1093  
1085 +(((
1094 1094  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 +)))
1095 1095  
1096 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image020.png]]
1089 +[[image:1653357170703-587.png]]
1097 1097  
1091 +(((
1098 1098  When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1093 +)))
1099 1099  
1100 1100  
1101 1101  **Example1**: Connect to a Low active sensor.
... ... @@ -1105,11 +1105,11 @@
1105 1105  * Connect sensor’s output to DI1-
1106 1106  * Connect sensor’s VCC to DI1+.
1107 1107  
1108 -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： ​​
1109 1109  
1110 - //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.
1105 + //IF// = DI1+ / 1K.
1111 1111  
1112 -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.
1113 1113  
1114 1114  
1115 1115  **Example2**: Connect to a High active sensor.
... ... @@ -1121,12 +1121,12 @@
1121 1121  
1122 1122  So when sensor active, the current between NEC2501 pin1 and pin2 is:
1123 1123  
1124 - //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.**
1125 1125  
1126 -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.
1127 1127  
1128 1128  
1129 -**Example3**: Connect to a 220v high active sensor.公司测试一下
1124 +**Example3**: Connect to a 220v high active sensor.
1130 1130  
1131 1131  Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1132 1132  
... ... @@ -1135,34 +1135,24 @@
1135 1135  
1136 1136  So when sensor active, the current between NEC2501 pin1 and pin2 is:
1137 1137  
1138 - //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.**
1139 1139  
1140 -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.
1141 1141  
1137 +=== 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1142 1142  
1143 -1.
1144 -11.
1145 -111. Digital Output Port: DO1/DO2 /DO3
1146 -
1147 1147  NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1148 1148  
1149 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]
1141 +[[image:1653357531600-905.png]]
1150 1150  
1143 +=== 3.6.4 Analog Input Interface ===
1151 1151  
1152 -
1153 -
1154 -1.
1155 -11.
1156 -111. Analog Input Interface
1157 -
1158 1158  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:
1159 1159  
1160 -AC2 = (IN2 voltage )/12
1147 +**AC2 = (IN2 voltage )/12**
1161 1161  
1162 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image024.png]]
1149 +[[image:1653357592296-182.png]]
1163 1163  
1164 -
1165 -
1166 1166  Example to connect a 4~~20mA sensor
1167 1167  
1168 1168  We take the wind speed sensor as an example for reference only.
... ... @@ -1178,232 +1178,279 @@
1178 1178  
1179 1179  Connection diagram:
1180 1180  
1181 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image025.jpg]]
1166 +[[image:1653357640609-758.png]]
1182 1182  
1183 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image026.png]]
1168 +[[image:1653357648330-671.png||height="155" width="733"]]
1184 1184  
1170 +=== 3.6.5 Relay Output ===
1185 1185  
1186 -
1187 -1.
1188 -11.
1189 -111. Relay Output
1190 -
1172 +(((
1191 1191  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 +)))
1192 1192  
1193 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image027.png]]
1176 +[[image:image-20220524100215-9.png]]
1194 1194  
1178 +[[image:image-20220524100215-10.png||height="382" width="723"]]
1195 1195  
1196 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image028.png]]
1180 +== 3.7 LEDs Indicators ==
1197 1197  
1182 +[[image:image-20220524100748-11.png]]
1198 1198  
1184 += 4. Use AT Command =
1199 1199  
1186 +== 4.1 Access AT Command ==
1200 1200  
1201 -
1202 -1.
1203 -11. LEDs Indicators
1204 -
1205 -(% border="1" style="background-color:#f7faff" %)
1206 -|**LEDs**|**Feature**
1207 -|**PWR**|Always on if there is power
1208 -|**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.
1209 -|**TX**|(((
1210 -Device boot: TX blinks 5 times.
1211 -
1212 -Successful join network: TX ON for 5 seconds.
1213 -
1214 -Transmit a LoRa packet: TX blinks once
1215 -)))
1216 -|**RX**|RX blinks once when receive a packet.
1217 -|**DO1**|
1218 -|**DO2**|
1219 -|**DO3**|
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 -|**DI2**|(((
1226 -For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1227 -
1228 -For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1229 -)))
1230 -|**DI3**|For LT-33222-L ONLY: ON when DI3 is low, LOW when DI3 is high
1231 -|**DI2**|(((
1232 -For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1233 -
1234 -For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1235 -)))
1236 -|**RO1**|
1237 -|**RO2**|
1238 -
1239 -1. Use AT Command
1240 -11. Access AT Command
1241 -
1242 1242  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.
1243 1243  
1244 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
1190 +[[image:1653358238933-385.png]]
1245 1245  
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:
1246 1246  
1247 -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]]
1248 1248  
1249 -[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image030.png]]
1250 -
1251 -
1252 1252  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/]]
1253 1253  
1198 +(((
1254 1254  AT+<CMD>?        : Help on <CMD>
1200 +)))
1255 1255  
1202 +(((
1256 1256  AT+<CMD>         : Run <CMD>
1204 +)))
1257 1257  
1206 +(((
1258 1258  AT+<CMD>=<value> : Set the value
1208 +)))
1259 1259  
1210 +(((
1260 1260  AT+<CMD>=?       : Get the value
1212 +)))
1261 1261  
1214 +(((
1262 1262  ATZ: Trig a reset of the MCU
1216 +)))
1263 1263  
1218 +(((
1264 1264  AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1220 +)))
1265 1265  
1222 +(((
1266 1266  AT+DEUI: Get or Set the Device EUI
1224 +)))
1267 1267  
1226 +(((
1268 1268  AT+DADDR: Get or Set the Device Address
1228 +)))
1269 1269  
1230 +(((
1270 1270  AT+APPKEY: Get or Set the Application Key
1232 +)))
1271 1271  
1234 +(((
1272 1272  AT+NWKSKEY: Get or Set the Network Session Key
1236 +)))
1273 1273  
1238 +(((
1274 1274  AT+APPSKEY: Get or Set the Application Session Key
1240 +)))
1275 1275  
1242 +(((
1276 1276  AT+APPEUI: Get or Set the Application EUI
1244 +)))
1277 1277  
1246 +(((
1278 1278  AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1248 +)))
1279 1279  
1250 +(((
1280 1280  AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1252 +)))
1281 1281  
1254 +(((
1282 1282  AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1256 +)))
1283 1283  
1258 +(((
1284 1284  AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1260 +)))
1285 1285  
1262 +(((
1286 1286  AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1264 +)))
1287 1287  
1266 +(((
1288 1288  AT+RX2FQ: Get or Set the Rx2 window frequency
1268 +)))
1289 1289  
1270 +(((
1290 1290  AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1272 +)))
1291 1291  
1274 +(((
1292 1292  AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1276 +)))
1293 1293  
1278 +(((
1294 1294  AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1280 +)))
1295 1295  
1282 +(((
1296 1296  AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1284 +)))
1297 1297  
1286 +(((
1298 1298  AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1288 +)))
1299 1299  
1290 +(((
1300 1300  AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1292 +)))
1301 1301  
1294 +(((
1302 1302  AT+NWKID: Get or Set the Network ID
1296 +)))
1303 1303  
1298 +(((
1304 1304  AT+FCU: Get or Set the Frame Counter Uplink
1300 +)))
1305 1305  
1302 +(((
1306 1306  AT+FCD: Get or Set the Frame Counter Downlink
1304 +)))
1307 1307  
1306 +(((
1308 1308  AT+CLASS: Get or Set the Device Class
1308 +)))
1309 1309  
1310 +(((
1310 1310  AT+JOIN: Join network
1312 +)))
1311 1311  
1314 +(((
1312 1312  AT+NJS: Get OTAA Join Status
1316 +)))
1313 1313  
1318 +(((
1314 1314  AT+SENDB: Send hexadecimal data along with the application port
1320 +)))
1315 1315  
1322 +(((
1316 1316  AT+SEND: Send text data along with the application port
1324 +)))
1317 1317  
1326 +(((
1318 1318  AT+RECVB: Print last received data in binary format (with hexadecimal values)
1328 +)))
1319 1319  
1330 +(((
1320 1320  AT+RECV: Print last received data in raw format
1332 +)))
1321 1321  
1334 +(((
1322 1322  AT+VER: Get current image version and Frequency Band
1336 +)))
1323 1323  
1338 +(((
1324 1324  AT+CFM: Get or Set the confirmation mode (0-1)
1340 +)))
1325 1325  
1342 +(((
1326 1326  AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1344 +)))
1327 1327  
1346 +(((
1328 1328  AT+SNR: Get the SNR of the last received packet
1348 +)))
1329 1329  
1350 +(((
1330 1330  AT+RSSI: Get the RSSI of the last received packet
1352 +)))
1331 1331  
1354 +(((
1332 1332  AT+TDC: Get or set the application data transmission interval in ms
1356 +)))
1333 1333  
1358 +(((
1334 1334  AT+PORT: Get or set the application port
1360 +)))
1335 1335  
1362 +(((
1336 1336  AT+DISAT: Disable AT commands
1364 +)))
1337 1337  
1366 +(((
1338 1338  AT+PWORD: Set password, max 9 digits
1368 +)))
1339 1339  
1370 +(((
1340 1340  AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1372 +)))
1341 1341  
1374 +(((
1342 1342  AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1376 +)))
1343 1343  
1378 +(((
1344 1344  AT+CFG: Print all settings
1380 +)))
1345 1345  
1382 +== 4.2 Common AT Command Sequence ==
1346 1346  
1384 +=== 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1347 1347  
1348 -1.
1349 -11. Common AT Command Sequence
1350 -111. Multi-channel ABP mode (Use with SX1301/LG308)
1351 -
1352 1352  If device has not joined network yet:
1353 1353  
1354 -123456
1388 +(% style="background-color:#dcdcdc" %)123456
1355 1355  
1356 -AT+FDR
1390 +(% style="background-color:#dcdcdc" %)AT+FDR
1357 1357  
1358 -123456
1392 +(% style="background-color:#dcdcdc" %)123456
1359 1359  
1360 -AT+NJM=0
1394 +(% style="background-color:#dcdcdc" %)AT+NJM=0
1361 1361  
1362 -ATZ
1396 +(% style="background-color:#dcdcdc" %)ATZ
1363 1363  
1364 1364  
1365 1365  If device already joined network:
1366 1366  
1367 -AT+NJM=0
1401 +(% style="background-color:#dcdcdc" %)AT+NJM=0
1368 1368  
1369 -ATZ
1403 +(% style="background-color:#dcdcdc" %)ATZ
1370 1370  
1371 -1.
1372 -11.
1373 -111. Single-channel ABP mode (Use with LG01/LG02)
1405 +=== 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1374 1374  
1375 -123456   Enter Password to have AT access.
1407 +(% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1376 1376  
1377 -AT+FDR   Reset Parameters to Factory Default, Keys Reserve
1409 +(% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1378 1378  
1379 -123456   Enter Password to have AT access.
1411 +(% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1380 1380  
1381 -AT+CLASS=C Set to work in CLASS C
1413 +(% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1382 1382  
1383 -AT+NJM=0 Set to ABP mode
1415 +(% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1384 1384  
1385 -AT+ADR=0 Set the Adaptive Data Rate Off
1417 +(% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1386 1386  
1387 -AT+DR=5  Set Data Rate
1419 +(% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1388 1388  
1389 -AT+TDC=60000  Set transmit interval to 60 seconds
1421 +(% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1390 1390  
1391 -AT+CHS=868400000 Set transmit frequency to 868.4Mhz
1423 +(% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1392 1392  
1393 -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)
1394 1394  
1395 -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
1396 1396  
1397 -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.
1398 1398  
1399 -ATZ          Reset MCU
1431 +(% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1400 1400  
1401 -**Note:**
1433 +(% style="color:red" %)**Note:**
1402 1402  
1403 -1. Make sure the device is set to ABP mode in the IoT Server.
1404 -1. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1405 -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.
1406 -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
1407 1407  
1408 1408  [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image031.png]]
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