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Last modified by Mengting Qiu on 2025/06/04 18:42
From version 56.1
edited by Xiaoling
on 2022/05/24 10:10
Change comment: Uploaded new attachment "1653358238933-385.png", version {1}
To version 44.2
edited by Xiaoling
on 2022/05/24 09:50
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... ... @@ -1051,23 +1051,29 @@
1051 1051  
1052 1052  [[image:1653356838789-523.png||height="337" width="740"]]
1053 1053  
1054 +
1054 1054  After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1055 1055  
1056 1056  
1057 -[[image:image-20220524094909-1.png||height="335" width="729"]]
1058 +[[image:image-20220524094909-1.png]]
1058 1058  
1059 -[[image:image-20220524094909-2.png||height="337" width="729"]]
1060 1060  
1061 -[[image:image-20220524094909-3.png||height="338" width="727"]]
1061 +[[image:image-20220524094909-2.png]]
1062 1062  
1063 -[[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1064 1064  
1065 -[[image:image-20220524094909-5.png||height="341" width="734"]]
1064 +[[image:image-20220524094909-3.png]]
1066 1066  
1067 1067  
1067 +[[image:image-20220524094909-4.png]]
1068 1068  
1069 1069  
1070 +[[image:image-20220524094909-5.png]]
1070 1070  
1072 +
1073 +
1074 +
1075 +
1076 +
1071 1071  == 3.6 Interface Detail ==
1072 1072  
1073 1073  === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
... ... @@ -1076,21 +1076,19 @@
1076 1076  
1077 1077  [[image:1653356991268-289.png]]
1078 1078  
1079 -=== 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1080 1080  
1081 -(((
1086 +
1087 +1.
1088 +11.
1089 +111. Digital Input Port: DI1/DI2 ( For LT-22222-L)
1090 +
1082 1082  The DI port of LT-22222-L can support NPN or PNP output sensor.
1083 -)))
1084 1084  
1085 -(((
1086 1086  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 -)))
1088 1088  
1089 -[[image:1653357170703-587.png]]
1095 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image020.png]]
1090 1090  
1091 -(((
1092 1092  When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1093 -)))
1094 1094  
1095 1095  
1096 1096  **Example1**: Connect to a Low active sensor.
... ... @@ -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： ​​
1107 +So when sensor active, the current between NEC2501 pin1 and pin2 is:
1104 1104  
1105 - //IF// = DI1+ / 1K.
1109 + //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.
1106 1106  
1107 -If DI1+ = 12v, the //IF// = 12mA , So the LT-22222-L will be able to detect this active signal.
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.
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 -[[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.**
1123 + //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.
1120 1120  
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.
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.
1122 1122  
1123 1123  
1124 -**Example3**: Connect to a 220v high active sensor.
1128 +**Example3**: Connect to a 220v high active sensor.公司测试一下
1125 1125  
1126 1126  Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1127 1127  
... ... @@ -1130,24 +1130,34 @@
1130 1130  
1131 1131  So when sensor active, the current between NEC2501 pin1 and pin2 is:
1132 1132  
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.**
1137 + //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 51K.
1134 1134  
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.
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.
1136 1136  
1137 -=== 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1138 1138  
1142 +1.
1143 +11.
1144 +111. Digital Output Port: DO1/DO2 /DO3
1145 +
1139 1139  NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1140 1140  
1141 -[[image:1653357531600-905.png]]
1148 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]
1142 1142  
1143 -=== 3.6.4 Analog Input Interface ===
1144 1144  
1151 +
1152 +
1153 +1.
1154 +11.
1155 +111. Analog Input Interface
1156 +
1145 1145  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:
1146 1146  
1147 -**AC2 = (IN2 voltage )/12**
1159 +AC2 = (IN2 voltage )/12
1148 1148  
1149 -[[image:1653357592296-182.png]]
1161 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image024.png]]
1150 1150  
1163 +
1164 +
1151 1151  Example to connect a 4~~20mA sensor
1152 1152  
1153 1153  We take the wind speed sensor as an example for reference only.
... ... @@ -1163,30 +1163,67 @@
1163 1163  
1164 1164  Connection diagram:
1165 1165  
1166 -[[image:1653357640609-758.png]]
1180 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image025.jpg]]
1167 1167  
1168 -[[image:1653357648330-671.png||height="155" width="733"]]
1182 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image026.png]]
1169 1169  
1170 -=== 3.6.5 Relay Output ===
1171 1171  
1172 -(((
1185 +
1186 +1.
1187 +11.
1188 +111. Relay Output
1189 +
1173 1173  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 -)))
1175 1175  
1192 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image027.png]]
1176 1176  
1177 -[[image:image-20220524100215-9.png]]
1178 1178  
1179 -[[image:image-20220524100215-10.png||height="382" width="723"]]
1195 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image028.png]]
1180 1180  
1181 1181  
1182 -== 3.7 LEDs Indicators ==
1183 1183  
1184 -[[image:image-20220524100748-11.png]]
1185 1185  
1186 -= 4. Use AT Command =
1187 1187  
1188 -== 4.1 Access AT Command ==
1201 +1.
1202 +11. LEDs Indicators
1189 1189  
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 +
1190 1190  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.
1191 1191  
1192 1192  [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
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