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856	856	|**PWR**|Always on if there is power
857	857	|**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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	860	+
859	859	= 4. Case Study =
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861	861	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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923	923	(% style="background-color:#dcdcdc" %)**AT+ADR=0** (%%)Set the Adaptive Data Rate Off
924	924
925		-(% style="background-color:#dcdcdc" %)**AT+DR=5**   (%%)Set Data Rate
	927	+(% style="background-color:#dcdcdc" %)**AT+DR=5**  (%%)Set Data Rate
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927	927	(% style="background-color:#dcdcdc" %)**AT+TDC=60000** (%%) Set transmit interval to 60 seconds
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967	967
968	968	**Step3: **Open flashloader; choose the correct COM port to update.
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970		-(% style="color:#037691" %) 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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972	972	[[image:image-20220602102605-1.png]]
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978	978	[[image:image-20220602102715-3.png]]
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	981	+
981	981	== 6.2 How to change the LoRa Frequency Bands/Region? ==
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983	983	User can follow the introduction for [[how to upgrade image>>||anchor="H6.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
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	987	+
986	986	== 6.3 How many RS485-Slave can RS485-BL connects? ==
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988	988	The RS485-BL can support max 32 RS485 devices. Each uplink command of RS485-BL can support max 16 different RS485 command. So RS485-BL can support max 16 RS485 devices pre-program in the device for uplink. For other devices no pre-program, user can use the [[downlink message (type code 0xA8) to poll their info>>||anchor="H3.3.3Configurereadcommandsforeachsampling"]].
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990	990
991		-== 6.4 Compatible question to ChirpStack and TTI LoRaWAN server ? ==
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993		-When user need to use with ChirpStack or TTI. Please set AT+RPL=4.
994		-
995		-Detail info check this link: [[Set Packet Receiving Response Level>>doc:Main.End Device AT Commands and Downlink Command.WebHome||anchor="H7.23SetPacketReceivingResponseLevel"]]
996		-
997		-
998	998	= 7. Trouble Shooting =
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