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236	236	There are plenty of RS485 devices in the market and each device has different command to read the valid data. To support these devices in flexible, RS485-LN supports flexible command set. User can use [[AT Commands>>||anchor="H3.5ConfigureRS485-BLviaATorDownlink"]] or LoRaWAN Downlink Command to configure what commands RS485-LN should send for each sampling and how to handle the return from RS485 devices.
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240	240	(% style="color:red" %)Note: below description and commands are for firmware version >v1.1, if you have firmware version v1.0. Please check the [[user manual v1.0>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/&file=RS485-LN_UserManual_v1.0.1.pdf]] or upgrade the firmware to v1.1
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	312	+
308	308	=== 3.3.2 Configure sensors ===
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323	323	mm: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
324	324	)))|(% style="width:190px" %)AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
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	331	+
326	326	=== 3.3.3 Configure read commands for each sampling ===
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1101	1101
1102	1102	(% border="1" cellspacing="10" style="background-color:#ffffcc; width:500px" %)
1103		-|=(% style="width: 161px;" %)(((
1104		-**Command example:**
1105		-)))|=(% style="width: 337px;" %)(((
	1109	+|=(% style="width: 100px;" %)(((
	1110	+**Command example**
	1111	+)))|=(% style="width: 400px;" %)(((
1106	1106	**Function**
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1108		-|(% style="width:161px" %)(((
	1114	+|(% style="width:100px" %)(((
1109	1109	AT+RXMODE=1,10
1110		-)))|(% style="width:337px" %)(((
	1116	+)))|(% style="width:400px" %)(((
1111	1111	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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1113		-|(% style="width:161px" %)(((
	1119	+|(% style="width:100px" %)(((
1114	1114	AT+RXMODE=2,500
1115		-)))|(% style="width:337px" %)(((
	1121	+)))|(% style="width:400px" %)(((
1116	1116	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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1118		-|(% style="width:161px" %)(((
	1124	+|(% style="width:100px" %)(((
1119	1119	AT+RXMODE=0,0
1120		-)))|(% style="width:337px" %)(((
	1126	+)))|(% style="width:400px" %)(((
1121	1121	Disable listening mode. This is the default settings.
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1123		-|(% style="width:161px" %)(((
	1129	+|(% style="width:100px" %)(((
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1125		-)))|(% style="width:337px" %)(((
	1131	+)))|(% style="width:400px" %)(((
1126	1126	A6 aa bb cc  same as AT+RXMODE=aa,(bb<<8 | cc)
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1174	1174	(% 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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1177	1177
1178	1178	== 3.7 Buttons ==
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1181		-(% border="1" cellspacing="10" style="background-color:#f7faff; width:430px" %)
1182		-|=(% style="width: 30px;" %)**Button**|=(% style="width: 355px;" %)**Feature**
1183		-|(% style="width:30px" %)**ACT**|(% style="width:355px" %)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**
1184		-|(% style="width:30px" %)**RST**|(% style="width:355px" %)Reboot RS485
1185		-|(% style="width:30px" %)**PRO**|(% style="width:355px" %)Use for upload image, see [[How to Update Image>>||anchor="H6.1Howtoupgradetheimage3F"]]
	1189	+(% border="1" cellspacing="10" style="background-color:#f7faff; width:400px" %)
	1190	+|=(% style="width: 50px;" %)**Button**|=(% style="width: 350px;" %)**Feature**
	1191	+|(% style="width:50px" %)**ACT**|(% style="width:350px" %)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**
	1192	+|(% style="width:50px" %)**RST**|(% style="width:350px" %)Reboot RS485
	1193	+|(% style="width:50px" %)**PRO**|(% style="width:350px" %)Use for upload image, see [[How to Update Image>>||anchor="H6.1Howtoupgradetheimage3F"]]
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1187	1187
1188	1188	== 3.8 LEDs ==
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1190	1190	(% border="1" cellspacing="10" style="background-color:#f7faff; width:430px" %)
1191		-|=(% style="width: 30px;" %)**LEDs**|=(% style="width: 400px;" %)**Feature**
1192		-|(% style="width:30px" %)**PWR**|=(% style="width: 400px;" %)Always on if there is power
1193		-|(% style="width:30px" %)**SYS**|=(% style="width: 400px;" %)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.
	1200	+|=(% style="width: 50px;" %)**LEDs**|=(% style="width: 380px;" %)**Feature**
	1201	+|**PWR**|Always on if there is power
	1202	+|**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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1195	1195
1196	1196	= 4. Case Study =
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1296	1296	== 6.1 How to upgrade the image? ==
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1298	1298	The RS485-LN LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to RS485-LN to:
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1299	1299
1300		-* Support new features
1301		-* For bug fix
1302		-* Change LoRaWAN bands.
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	1312	+Support new features
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	1314	+* (((
	1315	+For bug fix
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	1318	+Change LoRaWAN bands.
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1304	1304	Below shows the hardware connection for how to upload an image to RS485-LN:
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1306	1306	[[image:1654162535040-878.png]]
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1308	1308	**Step1:** Download [[flash loader>>url:https://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-programmers/flasher-stm32.html]].
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1310	1310	**Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
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1312	1312	**Step3: **Open flashloader; choose the correct COM port to update.
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1315	1315	(% style="color:blue" %) Hold down the PRO button and then momentarily press the RST reset button and the SYS led will change from OFF to ON, While SYS LED is RED ON, it means the RS485-LN is ready to be program.
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1319	1319	[[image:image-20220602175818-12.png]]