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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	+
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95	95	== 1.3 Features ==
96	96
97	97	* LoRaWAN Class A & Class C protocol (default Class C)
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309	309	)))
310	310	)))
311	311
312		-
313	313	=== 3.3.2 Configure sensors ===
314	314
315	315	(((
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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" %)(((
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324	324	This command is used to configure the RS485/TTL devices; they won’t be used during sampling.
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325	325
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326	326	AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,
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327	327
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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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1177	1177	)))
1178	1178
1179	1179	(((
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1180	1180	(% 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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1182	1182
1183	1183
1184	1184	== 3.7 Buttons ==
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1190	1190	|(% style="width:50px" %)**RST**|(% style="width:350px" %)Reboot RS485
1191	1191	|(% style="width:50px" %)**PRO**|(% style="width:350px" %)Use for upload image, see [[How to Update Image>>||anchor="H6.1Howtoupgradetheimage3F"]]
1192	1192
1193		-
1194	1194	== 3.8 LEDs ==
1195	1195
1196	1196
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1199	1199	|**PWR**|Always on if there is power
1200	1200	|**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.
1201	1201
1202		-
1203	1203	= 4. Case Study =
1204	1204
1205	1205	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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1251	1251	)))
1252	1252
1253	1253
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1254	1254	If device already joined network:
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1255	1255
1256	1256	(% class="box infomessage" %)
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1290	1290
1291	1291	(% style="color:red" %)**Note:**
1292	1292
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1293	1293	(% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1294	1294	2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1295	1295	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.
1296	1296	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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1297	1297
1298	1298	[[image:1654162478620-421.png]]
1299	1299
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1322	1322
1323	1323	[[image:1654162535040-878.png]]
1324	1324
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1325	1325	**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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1327	1327	**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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1328	1328
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1329	1329	**Step3: **Open flashloader; choose the correct COM port to update.
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1330	1330
1331	1331	(((
1332	1332	(((
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1333	1333	(% 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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1335	1335	)))
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1336	1336
1337	1337
1338	1338	[[image:image-20220602175818-12.png]]