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92	92	* Automatic RF Sense and CAD with ultra-fast AFC.
93	93	* Packet engine up to 256 bytes with CRC
94	94
	95	+
	96	+
95	95	== 1.3 Features ==
96	96
97	97	* LoRaWAN Class A & Class C protocol (default Class C)
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103	103	* Support Modbus protocol
104	104	* Support Interrupt uplink (Since hardware version v1.2)
105	105
	108	+
	109	+
106	106	== 1.4 Applications ==
107	107
108	108	* Smart Buildings & Home Automation
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112	112	* Smart Cities
113	113	* Smart Factory
114	114
	119	+
	120	+
115	115	== 1.5 Firmware Change log ==
116	116
117	117	[[RS485-LN Image files – Download link and Change log>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/]]
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321	321	(% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
322	322	|=(% style="width: 110px;" %)**AT Commands**|=(% style="width: 190px;" %)**Description**|=(% style="width: 190px;" %)**Example**
323	323	|AT+CFGDEV|(% style="width:110px" %)(((
	330	+(((
324	324	This command is used to configure the RS485/TTL devices; they won’t be used during sampling.
	332	+)))
325	325
	334	+(((
326	326	AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,
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327	327
	338	+(((
328	328	mm: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
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329	329	)))|(% style="width:190px" %)AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
330	330
331		-
332	332	=== 3.3.3 Configure read commands for each sampling ===
333	333
334	334	(((
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1192	1192	|(% style="width:50px" %)**RST**|(% style="width:350px" %)Reboot RS485
1193	1193	|(% style="width:50px" %)**PRO**|(% style="width:350px" %)Use for upload image, see [[How to Update Image>>||anchor="H6.1Howtoupgradetheimage3F"]]
1194	1194
1195		-
1196	1196	== 3.8 LEDs ==
1197	1197
1198	1198
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1201	1201	|**PWR**|Always on if there is power
1202	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.
1203	1203
1204		-
1205	1205	= 4. Case Study =
1206	1206
1207	1207	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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1253	1253	)))
1254	1254
1255	1255
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1256	1256	If device already joined network:
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1257	1257
1258	1258	(% class="box infomessage" %)
1259	1259	(((
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1292	1292
1293	1293	(% style="color:red" %)**Note:**
1294	1294
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1295	1295	(% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1296	1296	2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1297	1297	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.
1298	1298	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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1299	1299
1300	1300	[[image:1654162478620-421.png]]
1301	1301
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1324	1324
1325	1325	[[image:1654162535040-878.png]]
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1327	1327	**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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1328	1328
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1329	1329	**Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
	1346	+)))
1330	1330
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1331	1331	**Step3: **Open flashloader; choose the correct COM port to update.
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1332	1332
1333	1333	(((
1334	1334	(((
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1335	1335	(% 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.
1336	1336	)))
1337	1337	)))
	1358	+)))
1338	1338
1339	1339
1340	1340	[[image:image-20220602175818-12.png]]