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1086	1086	== 3.6 Listening mode for RS485 network ==
1087	1087
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1088	1088	This feature support since firmware v1.4
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1089	1089
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1090	1090	RS485-LN supports listening mode, it can listen the RS485 network packets and send them via LoRaWAN uplink. Below is the structure. The blue arrow shows the RS485 network packets to RS485-LN.
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1091	1091
1092	1092	[[image:image-20220602171200-8.png||height="567" width="1007"]]
1093	1093
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1094	1094	To enable the listening mode, use can run the command AT+RXMODE.
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1095	1095
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1096	1096
1097		-(% border="1" style="background-color:#ffffcc; width:500px" %)
1098		-|=(% style="width: 161px;" %)**Command example:**|=(% style="width: 337px;" %)**Function**
1099		-|(% style="width:161px" %)AT+RXMODE=1,10 |(% style="width:337px" %)Enable listening mode 1, if RS485-LN has received more than 10 RS485 commands from the network. RS485-LN will send these commands via LoRaWAN uplinks.
1100		-|(% style="width:161px" %)AT+RXMODE=2,500|(% style="width:337px" %)Enable listening mode 2, RS485-LN will capture and send a 500ms content once from the first detect of character. Max value is 65535 ms
1101		-|(% style="width:161px" %)AT+RXMODE=0,0|(% style="width:337px" %)Disable listening mode. This is the default settings.
1102		-|(% style="width:161px" %) |(% style="width:337px" %)A6 aa bb cc  same as AT+RXMODE=aa,(bb<<8 ~| cc)
	1108	+(% border="1" cellspacing="10" style="background-color:#ffffcc; width:500px" %)
	1109	+|=(% style="width: 161px;" %)(((
	1110	+**Command example:**
	1111	+)))|=(% style="width: 337px;" %)(((
	1112	+**Function**
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	1114	+|(% style="width:161px" %)(((
	1115	+AT+RXMODE=1,10
	1116	+)))|(% style="width:337px" %)(((
	1117	+Enable listening mode 1, if RS485-LN has received more than 10 RS485 commands from the network. RS485-LN will send these commands via LoRaWAN uplinks.
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	1119	+|(% style="width:161px" %)(((
	1120	+AT+RXMODE=2,500
	1121	+)))|(% style="width:337px" %)(((
	1122	+Enable listening mode 2, RS485-LN will capture and send a 500ms content once from the first detect of character. Max value is 65535 ms
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	1124	+|(% style="width:161px" %)(((
	1125	+AT+RXMODE=0,0
	1126	+)))|(% style="width:337px" %)(((
	1127	+Disable listening mode. This is the default settings.
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	1129	+|(% style="width:161px" %)(((
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	1131	+)))|(% style="width:337px" %)(((
	1132	+A6 aa bb cc  same as AT+RXMODE=aa,(bb<<8 | cc)
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1103	1103
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1104	1104	**Downlink Command:**
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1105	1105
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1106	1106	**0xA6 aa bb cc ** same as AT+RXMODE=aa,(bb<<8 | cc)
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1107	1107
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1109	1109	**Example**:
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1111	1111	The RS485-LN is set to AT+RXMODE=2,1000
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1112	1112
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1113	1113	There is a two Modbus commands in the RS485 network as below:
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1115	1115	The Modbus master send a command: (% style="background-color:#ffc000" %)01 03 00 00 00 02 c4 0b
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1116	1116
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1117	1117	And Modbus slave reply with: (% style="background-color:green" %)01 03 04 00 00 00 00 fa 33
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1119	1119	RS485-LN will capture both and send the uplink: (% style="background-color:#ffc000" %)01 03 00 00 00 02 c4 0b  (% style="background-color:green" %)01 03 04 00 00 00 00 fa 33
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1121	1121	[[image:image-20220602171200-9.png]]
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1124	1124	(% style="color:red" %)Notice: Listening mode can work with the default polling mode of RS485-LN. When RS485-LN is in to send the RS485 commands (from AT+COMMANDx), the listening mode will be interrupt for a while.
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1127	1127	== 3.7 Buttons ==
1128	1128
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1130		-(% border="1" style="background-color:#f7faff; width:500px" %)
	1187	+(% border="1" cellspacing="10" style="background-color:#f7faff; width:500px" %)
1131	1131	|=**Button**|=(% style="width: 1420px;" %)**Feature**
1132	1132	|**ACT**|(% style="width:1420px" %)If RS485 joined in network, press this button for more than 1 second, RS485 will upload a packet, and the SYS LED will give a (% style="color:blue" %)**Blue blink**
1133	1133	|**RST**|(% style="width:1420px" %)Reboot RS485
1134	1134	|**PRO**|(% style="width:1420px" %)Use for upload image, see [[How to Update Image>>||anchor="H6.1Howtoupgradetheimage3F"]]
1135	1135
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1136	1136	== 3.8 LEDs ==
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1138		-(% border="1" style="background-color:#f7faff; width:500px" %)
	1197	+(% border="1" cellspacing="10" style="background-color:#f7faff; width:500px" %)
1139	1139	|=**LEDs**|=**Feature**
1140	1140	|**PWR**|Always on if there is power
1141	1141	|**SYS**|After device is powered on, the SYS will (% style="color:green" %)**fast blink in GREEN** (%%)for 5 times, means RS485-LN start to join LoRaWAN network. If join success, SYS will be (% style="color:green" %)**on GREEN for 5 seconds**(%%)**. **SYS will (% style="color:green" %)**blink Blue**(%%) on every upload and (% style="color:green" %)**blink Green**(%%) once receive a downlink message.
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1143	1143	= 4. Case Study =
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1145	1145	User can check this URL for some case studies: [[APP RS485 COMMUNICATE WITH SENSORS>>doc:Main.Application Note \: Communicate with Different Sensors ----- RS485-LN RS485-BL.WebHome]]
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1150	1150	== 5.1 Access AT Command ==
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1152	1152	RS485-BL supports AT Command set. User can use a USB to TTL adapter plus the 3.5mm Program Cable to connect to RS485-BL to use AT command, as below.
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1154	1154	[[image:1654162355560-817.png]]
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1157	1157	In PC, User needs to set (% style="color:blue" %)**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 of RS485-BL. The default password is 123456. Below is the output for reference:
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1159	1159	[[image:1654162368066-342.png]]
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