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  • 1654162535040-878.png

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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	859
	860	+
860	860	= 4. Case Study =
861	861
862	862	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
924	924	(% style="background-color:#dcdcdc" %)**AT+ADR=0** (%%)Set the Adaptive Data Rate Off
925	925
926		-(% style="background-color:#dcdcdc" %)**AT+DR=5**   (%%)Set Data Rate
	927	+(% style="background-color:#dcdcdc" %)**AT+DR=5**  (%%)Set Data Rate
927	927
928	928	(% style="background-color:#dcdcdc" %)**AT+TDC=60000** (%%) Set transmit interval to 60 seconds
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945	945	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.
946	946	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
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948		-[[image:1654162478620-421.png]]
	949	+[[image:1654136435598-589.png]]
949	949
950	950
951	951	= 6. FAQ =
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952	952
953	953	== 6.1 How to upgrade the image? ==
954	954
955		-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:
956	956
957	957	* Support new features
958	958	* For bug fix
959	959	* Change LoRaWAN bands.
960	960
961		-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:
962	962
963		-[[image:1654162535040-878.png]]
	964	+[[image:1654136646995-976.png]]
964	964
965	965	**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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968	968
969	969	**Step3: **Open flashloader; choose the correct COM port to update.
970	970
971		-(% 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.
972		-
973	973	[[image:image-20220602102605-1.png]]
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979	979	[[image:image-20220602102715-3.png]]
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	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.
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986	986
	987	+
987	987	== 6.3 How many RS485-Slave can RS485-BL connects? ==
988	988
989	989	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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