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...	...	@@ -1140,14 +1140,21 @@
1140	1140
1141	1141	[[image:1653357531600-905.png]]
1142	1142
1143		-=== 3.6.4 Analog Input Interface ===
1144	1144
	1144	+
	1145	+
	1146	+1.
	1147	+11.
	1148	+111. Analog Input Interface
	1149	+
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**
	1152	+AC2 = (IN2 voltage )/12
1148	1148
1149		-[[image:1653357592296-182.png]]
	1154	+[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image024.png]]
1150	1150
	1156	+
	1157	+
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]]
	1173	+[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image025.jpg]]
1167	1167
1168		-[[image:1653357648330-671.png||height="155" width="733"]]
	1175	+[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image026.png]]
1169	1169
1170		-=== 3.6.5 Relay Output ===
1171	1171
1172		-(((
	1178	+
	1179	+1.
	1180	+11.
	1181	+111. Relay Output
	1182	+
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
	1185	+[[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"]]
	1188	+[[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 ==
	1194	+1.
	1195	+11. LEDs Indicators
1189	1189
	1197	+(% border="1" style="background-color:#f7faff" %)
	1198	+|**LEDs**|**Feature**
	1199	+|**PWR**|Always on if there is power
	1200	+|**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.
	1201	+|**TX**|(((
	1202	+Device boot: TX blinks 5 times.
	1203	+
	1204	+Successful join network: TX ON for 5 seconds.
	1205	+
	1206	+Transmit a LoRa packet: TX blinks once
	1207	+)))
	1208	+|**RX**|RX blinks once when receive a packet.
	1209	+|**DO1**|
	1210	+|**DO2**|
	1211	+|**DO3**|
	1212	+|**DI2**|(((
	1213	+For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
	1214	+
	1215	+For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
	1216	+)))
	1217	+|**DI2**|(((
	1218	+For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
	1219	+
	1220	+For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
	1221	+)))
	1222	+|**DI3**|For LT-33222-L ONLY: ON when DI3 is low, LOW when DI3 is high
	1223	+|**DI2**|(((
	1224	+For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
	1225	+
	1226	+For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
	1227	+)))
	1228	+|**RO1**|
	1229	+|**RO2**|
	1230	+
	1231	+1. Use AT Command
	1232	+11. Access AT Command
	1233	+
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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