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164	164	[[image:image-20220524164448-13.png]]
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	166	+
166	166	== 3.5 Trouble Shooting ==
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168	168	User can check the station log in the logread/system log page.
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169	169
170	170	[[image:image-20220524164514-14.png]]
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	173	+
172	172	and recode the station log in the system/Recode log page.
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174	174	[[image:image-20220524164541-15.png]]
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	178	+
176	176	= 4. Downlink =
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178	178	== 4.1 Chirpstack Downlink Note ==
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181	181
182	182	Convert the data to Base64
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	187	+
184	184	[[image:image-20220526090748-4.png]]
185	185
186	186	Check ChripStack downlink DataRate
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	192	+
188	188	[[image:image-20220525101326-11.png]]
189	189
190	190	Make sure the RX2DR is the same in the end node
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	197	+
192	192	== 4.2 Loraserver Downlink Note ==
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194	194	User can use MQTT to send downlink payload to ChirpStack to perform downstream to LoRaWAN End
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210	210	(((
211	211	MQTT Connect to ChirpStack
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	219	+
212	212	)))
213	213
214	214	(((
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235	235	MQTT Connect to ChirpStack
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	245	+
237	237	(((
238	238	(% style="color:red" %)Note: Chirpstack use base64 to downlink, so need to convert the downlink payload from HEX to base64 [[https:~~/~~/base64.us/>>url:https://base64.us/]]
239	239	)))
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243	243	Choose to Use Hex for Encode
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245	245	If we want send downstream hex 030101 to end node, the BASE64 payload is AwEB
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247	247	[[image:image-20220525104025-15.png]]