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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	+
859	859	= 4. Case Study =
860	860
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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922	922
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
926	926
927	927	(% style="background-color:#dcdcdc" %)**AT+TDC=60000** (%%) Set transmit interval to 60 seconds
928	928
...	...	@@ -944,7 +944,7 @@
944	944	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.
945	945	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
946	946
947		-[[image:1654162478620-421.png]]
	949	+[[image:1654136435598-589.png]]
948	948
949	949
950	950	= 6. FAQ =
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951	951
952	952	== 6.1 How to upgrade the image? ==
953	953
954		-The RS485-LN LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to RS485-LN to:
	956	+The RS485-BL LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to RS485-BL to:
955	955
956	956	* Support new features
957	957	* For bug fix
958	958	* Change LoRaWAN bands.
959	959
960		-Below shows the hardware connection for how to upload an image to RS485-LN:
	962	+Below shows the hardware connection for how to upload an image to RS485-BL:
961	961
962		-[[image:1654162535040-878.png]]
	964	+[[image:1654136646995-976.png]]
963	963
964	964	**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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967	967
968	968	**Step3: **Open flashloader; choose the correct COM port to update.
969	969
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]]
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974	974
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978	978	[[image:image-20220602102715-3.png]]
979	979
980	980
	981	+
981	981	== 6.2 How to change the LoRa Frequency Bands/Region? ==
982	982
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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985	985
	987	+
986	986	== 6.3 How many RS485-Slave can RS485-BL connects? ==
987	987
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"]].
989	989
990	990
991		-== 6.4 Compatible question to ChirpStack and TTI LoRaWAN server ? ==
992	992
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		-
998	998	= 7. Trouble Shooting =
999	999
1000	1000