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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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946	946	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.
947	947	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
948	948
949		-[[image:1654136435598-589.png]]
	947	+[[image:1654162478620-421.png]]
950	950
951	951
952	952	= 6. FAQ =
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953	953
954	954	== 6.1 How to upgrade the image? ==
955	955
956		-The RS485-BL LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to RS485-BL to:
	954	+The RS485-LN LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to RS485-LN to:
957	957
958	958	* Support new features
959	959	* For bug fix
960	960	* Change LoRaWAN bands.
961	961
962		-Below shows the hardware connection for how to upload an image to RS485-BL:
	960	+Below shows the hardware connection for how to upload an image to RS485-LN:
963	963
964		-[[image:1654136646995-976.png]]
	962	+[[image:1654162535040-878.png]]
965	965
966	966	**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]].
967	967
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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>>doc:Main.End Device AT Commands and Downlink Command.WebHome||anchor="H7.23SetPacketReceivingResponseLevel"]]
	996	+
	997	+
994	994	= 7. Trouble Shooting =
995	995
996	996

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