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1		-XWiki.Edwin
	1	+XWiki.ting

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244	244	[[image:image-20240109160800-6.png]]
245	245
246	246
247		-
248	248	=== 1.10.2 for LS version ===
249	249
250	250
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765	765	* Example 1: Downlink Payload: 080003  **~-~-->**  AT+PROBE=0003
766	766	* Example 2: Downlink Payload: 080101  **~-~-->**  AT+PROBE=0101
767	767
768		-=== 3.3.5 Multiple collections are one uplink（Since firmware V1.1） ===
	767	+=== 3.3.5 Multiple collections are one uplink (Since firmware V1.1) ===
769	769
770	770
771	771	Added AT+STDC command to collect the voltage of VDC_INPUT multiple times and upload it at one time.
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840	840	When downloading the images, choose the required image file for download. ​
841	841
842	842
	842	+== 6.4 How to measure the depth of other liquids other than water? ==
	843	+
	844	+
	845	+Test the current values at the depth of different liquids and convert them to a linear scale.
	846	+Replace its ratio with the ratio of water to current in the decoder.
	847	+
	848	+**Example:**
	849	+
	850	+Measure the corresponding current of the sensor when the liquid depth is 2.04m and 0.51m.
	851	+
	852	+**Calculate scale factor：**
	853	+Use these two data to calculate the current and depth scaling factors：(7.888-5.035)/(2.04-0.51)=1.86470588235294
	854	+
	855	+**Calculation formula：**
	856	+
	857	+Use the calibration formula：(Current current - Minimum calibration current)/Scale factor + Minimum actual calibration height
	858	+
	859	+**Actual calculations：**
	860	+
	861	+Use this formula to calculate the value corresponding to the current at a depth of 1.5 meters: (6.918-5.035)/1.86470588235294+0.51=1.519810726
	862	+
	863	+**Error：**
	864	+
	865	+0.009810726
	866	+
	867	+
	868	+[[image:image-20240329175044-1.png]]
	869	+
843	843	= 7. Troubleshooting =
844	844
845	845	== 7.1 Water Depth Always shows 0 in payload ==

image-20240329175044-1.png

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	1	+XWiki.Bei

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