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1		-XWiki.Xiaoling
	1	+XWiki.Bei

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1244	1244	In the case if user can see the console output but can't type input to the device. Please check if you already include the (% style="color:green" %)**ENTER**(%%) while sending out the command. Some serial tool doesn't send (% style="color:green" %)**ENTER**(%%) while press the send key, user need to add ENTER in their string.
1245	1245
1246	1246
	1247	+== 7.2 Possible reasons why the device is unresponsive： ==
	1248	+
	1249	+
	1250	+​1. Check whether the battery voltage is lower than 2.8V
	1251	+2. Check whether the jumper of the device is correctly connected
	1252	+
	1253	+[[image:image-20240330174400-2.png]]
	1254	+3. Check whether the switch here of the device is at the ISP（The switch can operate normally only when it is in RUN）
	1255	+
	1256	+[[image:image-20240330174406-3.png]]
	1257	+​
	1258	+
	1259	+== 7.3 The node cannot read the sensor data ==
	1260	+
	1261	+This may be caused by a software firmware(≤1.1.6 version) bug, which we fixed in the latest firmware (>1.0.0 version)
	1262	+
	1263	+The user can fix this problem via upgrade firmware.
	1264	+
	1265	+
	1266	+By default, The latest firmware value of POWERIC is 1, while the 3322 version requires POWERIC to be set to 0 in order to function properly
	1267	+
	1268	+
	1269	+* **//1. Check if the hardware version is 3322//**
	1270	+
	1271	+If the sensor hardware version is 3322 or earlier, the user can change the POWERIC value to 0 after a firmware upgrade using one of the following methods
	1272	+
	1273	+**a. Using AT command**
	1274	+
	1275	+(% class="box infomessage" %)
	1276	+(((
	1277	+AT+POWERIC=0.
	1278	+)))
	1279	+
	1280	+
	1281	+**b. Using Downlink**
	1282	+
	1283	+(% class="box infomessage" %)
	1284	+(((
	1285	+FF 00(AT+POWERIC=0).
	1286	+)))
	1287	+
	1288	+
	1289	+[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/image-20240531090837-1.png?rev=1.1||alt="image-20240531090837-1.png"]]
	1290	+
	1291	+
	1292	+Please check your hardware production date
	1293	+
	1294	+The first two digits are the week of the year, and the last two digits are the year.
	1295	+
	1296	+The number 3322 is the first batch we changed the power IC.
	1297	+
	1298	+
1247	1247	= 8. Order Info =
1248	1248
1249	1249

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