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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.
858	858
859		-
860		-
861	861	= 4. Case Study =
862	862
863	863	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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924	924
925	925	(% style="background-color:#dcdcdc" %)**AT+ADR=0** (%%)Set the Adaptive Data Rate Off
926	926
927		-(% style="background-color:#dcdcdc" %)**AT+DR=5**  (%%)Set Data Rate
	925	+(% style="background-color:#dcdcdc" %)**AT+DR=5**   (%%)Set Data Rate
928	928
929	929	(% style="background-color:#dcdcdc" %)**AT+TDC=60000** (%%) Set transmit interval to 60 seconds
930	930
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969	969
970	970	**Step3: **Open flashloader; choose the correct COM port to update.
971	971
	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.
	971	+
972	972	[[image:image-20220602102605-1.png]]
973	973
974	974
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978	978	[[image:image-20220602102715-3.png]]
979	979
980	980
981		-
982	982	== 6.2 How to change the LoRa Frequency Bands/Region? ==
983	983
984	984	User can follow the introduction for [[how to upgrade image>>||anchor="H6.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
985	985
986	986
987		-
988	988	== 6.3 How many RS485-Slave can RS485-BL connects? ==
989	989
990	990	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"]].
991	991
992	992
	991	+== 6.4 Compatible question to ChirpStack and TTI LoRaWAN server ? ==
993	993
	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>>End Device AT Commands and Downlink Command||anchor="H7.23SetPacketReceivingResponseLevel"]]
	996	+
	997	+
994	994	= 7. Trouble Shooting =
995	995
996	996