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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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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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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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1178	1178	== 3.7 Buttons ==
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1194	1194	|**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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1197		-
1198	1198	= 4. Case Study =
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1200	1200	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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1286	1286	(% style="color:red" %)**Note:**
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1288	1288	(% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1289	1289	2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1290	1290	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.
1291	1291	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
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1293	1293	[[image:1654162478620-421.png]]
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1318	1318	[[image:1654162535040-878.png]]
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1320	1320	**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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1322	1322	**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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1324	1324	**Step3: **Open flashloader; choose the correct COM port to update.
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1328	1328	(% 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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1333	1333	[[image:image-20220602175818-12.png]]