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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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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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1184	1184	|(% style="width:50px" %)**RST**|(% style="width:350px" %)Reboot RS485
1185	1185	|(% 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	== 3.8 LEDs ==
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1247	1247	If device already joined network:
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1249	1249	(% class="box infomessage" %)
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1284	1284	(% style="color:red" %)**Note:**
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1286	1286	(% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1287	1287	2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1288	1288	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.
1289	1289	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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1291	1291	[[image:1654162478620-421.png]]
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1316	1316	[[image:1654162535040-878.png]]
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1318	1318	**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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1320	1320	**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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1322	1322	**Step3: **Open flashloader; choose the correct COM port to update.
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1326	1326	(% 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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1331	1331	[[image:image-20220602175818-12.png]]