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863	863	|**PWR**|Always on if there is power
864	864	|**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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866	866	= 4. Case Study =
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868	868	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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882	882	[[image:1654162368066-342.png]]
883	883
884	884
885		-More detail AT Command manual can be found at [[AT Command Manual>>||anchor="3.5ConfigureRS485-BLviaATorDownlink"]]
	886	+More detail AT Command manual can be found at [[AT Command Manual>>https://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
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887	887
888	888	== 5.2 Common AT Command Sequence ==
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975	975	**Step3: **Open flashloader; choose the correct COM port to update.
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977	977	(% 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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980	980	[[image:image-20220602175818-12.png]]
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1037	1037	* (% style="color:blue" %)**RU864**(%%): frequency bands RU864
1038	1038	* (% style="color:blue" %)**KZ865**(%%): frequency bands KZ865
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1040	1040	= 9.Packing Info =
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1053	1053	* Package Size / pcs : 14.5 x 8 x 5 cm
1054	1054	* Weight / pcs : 170g
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1056	1056	= 10. FCC Caution for RS485LN-US915 =
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1058	1058	Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
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1060	1060	This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
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1063	1063	**IMPORTANT NOTE:**
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1065	1065	**Note: **This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
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1067	1067	—Reorient or relocate the receiving antenna.
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1069	1069	—Increase the separation between the equipment and receiver.
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1071	1071	—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
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1073	1073	—Consult the dealer or an experienced radio/TV technician for help.
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1076	1076	**FCC Radiation Exposure Statement:**
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1078	1078	This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.This equipment should be installed and operated with minimum distance 20cm between the radiator& your body.
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1081	1081	= 11. Support =
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1083		-* Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
1084		-* Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]].
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	1117	+Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
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	1119	+* (((
	1120	+Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]].
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