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Last modified by Kilight Cao on 2025/07/22 16:13
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edited by Mengting Qiu
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To version 79.1
edited by kai
on 2025/06/28 09:29
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237 237  [[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/Dragino%20LoRaWAN%20Weather%20Station%20User%20Manual/WebHome/1656057377943-564.png?rev=1.1||alt="1656057377943-564.png"]]
238 238  
239 239  
240 -== 4.6 Calibration Values (K-value Adjustment) ==
241 -
242 -In the event of deviations in the sensor values, calibration can be carried out by modifying the sensor's internal parameter: K-value parameter(**Default: 03E8(H)=1000(D)**).
243 -
244 -(% style="color:#037691" %)**Calibration Principle**
245 -
246 -The K-value scales the sensor's output. If multiple sensors measure the same parameter but show different values, adjust the K-value of the secondary sensor(s) to match the primary sensor's reading.
247 -
248 -(% style="color:#037691" %)**Step-by-Step Example:**
249 -
250 -**Scenario:**
251 -
252 -* Sensor 1 (reference) reads 1500.
253 -* Sensor 2 reads 2000, but should match Sensor 1's value (~~1500).
254 -
255 -**Steps:**
256 -
257 -1. (((
258 -**Calculate the K-value ratio**:
259 -
260 -Ratio=Desired Value
261 -)))
262 -1. Current Value=15002000=0.75Ratio=Current ValueDesired Value​=20001500​=0.75(((
263 -Multiply by the default K-value (1000) to get the new K-value:
264 -
265 -0.75×1000=750(Decimal)0.75×1000=750(Decimal)
266 -)))
267 -
268 -
269 -
270 -
271 -
272 -if the value of sensor 1 is 1500 and the value of sensor 2 is 2000, it is necessary to keep the values around 1500if the value of sensor 1 is 1500 and the value of sensor 2 is 2000, it is necessary to keep the values around 1500.
273 -
274 -Modify the K value of sensor 2:
275 -
276 -* K value calculation as follows:
277 -* 1500/2000=0.75,  0.75*1000=750
278 -* Convert 750 to hexadecimal to 02EE.
279 -* Send command to sensor 2
280 -* Send：0B 06 00 53 02 EE F8 5D  Send successfully and return this command
281 -
282 -
283 -
284 -
285 285  = 5. WSS-25 ~-~- Temperature, Humidity, Illuminance, Pressure =
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