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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		-
97	97	== 1.3 Features ==
98	98
99	99	* LoRaWAN Class A & Class C protocol (default Class C)
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105	105	* Support Modbus protocol
106	106	* Support Interrupt uplink (Since hardware version v1.2)
107	107
108		-
109		-
110	110	== 1.4 Applications ==
111	111
112	112	* Smart Buildings & Home Automation
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116	116	* Smart Cities
117	117	* Smart Factory
118	118
119		-
120		-
121	121	== 1.5 Firmware Change log ==
122	122
123	123	[[RS485-LN Image files – Download link and Change log>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/]]
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327	327	(% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
328	328	|=(% style="width: 110px;" %)**AT Commands**|=(% style="width: 190px;" %)**Description**|=(% style="width: 190px;" %)**Example**
329	329	|AT+CFGDEV|(% style="width:110px" %)(((
330		-(((
331	331	This command is used to configure the RS485/TTL devices; they won’t be used during sampling.
332		-)))
333	333
334		-(((
335	335	AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,
336		-)))
337	337
338		-(((
339	339	mm: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
340		-)))
341	341	)))|(% style="width:190px" %)AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
342	342
	331	+
343	343	=== 3.3.3 Configure read commands for each sampling ===
344	344
345	345	(((
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1203	1203	|(% style="width:50px" %)**RST**|(% style="width:350px" %)Reboot RS485
1204	1204	|(% style="width:50px" %)**PRO**|(% style="width:350px" %)Use for upload image, see [[How to Update Image>>||anchor="H6.1Howtoupgradetheimage3F"]]
1205	1205
	1195	+
1206	1206	== 3.8 LEDs ==
1207	1207
1208	1208
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1211	1211	|**PWR**|Always on if there is power
1212	1212	|**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.
1213	1213
	1204	+
1214	1214	= 4. Case Study =
1215	1215
1216	1216	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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1262	1262	)))
1263	1263
1264	1264
1265		-(((
1266	1266	If device already joined network:
1267		-)))
1268	1268
1269	1269	(% class="box infomessage" %)
1270	1270	(((
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1303	1303
1304	1304	(% style="color:red" %)**Note:**
1305	1305
1306		-(((
1307	1307	(% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1308	1308	2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1309	1309	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.
1310	1310	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
1311		-)))
1312	1312
1313	1313	[[image:1654162478620-421.png]]
1314	1314
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1337	1337
1338	1338	[[image:1654162535040-878.png]]
1339	1339
1340		-(((
1341	1341	**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]].
1342		-)))
1343	1343
1344		-(((
1345	1345	**Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1346		-)))
1347	1347
1348		-(((
1349	1349	**Step3: **Open flashloader; choose the correct COM port to update.
1350		-)))
1351	1351
1352	1352	(((
1353	1353	(((
1354		-(((
1355	1355	(% 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.
1356	1356	)))
1357	1357	)))
1358		-)))
1359	1359
1360	1360
1361	1361	[[image:image-20220602175818-12.png]]