Summary

• Page properties (1 modified, 0 added, 0 removed)

Details

Page properties

Content

...	...	@@ -214,7 +214,7 @@
214	214
215	215
216	216
217		-=== 2.3.2  DS18B20 Temperature sensor ===
	217	+=== 2.3.2 DS18B20 Temperature sensor ===
218	218
219	219	This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
220	220
...	...	@@ -227,27 +227,26 @@
227	227
228	228
229	229
230		-=== 2.3.3  Distance ===
	230	+=== 2.3.3 Soil pH ===
231	231
232		-Represents the distance value of the measurement output, the default unit is cm, and the value range parsed as a decimal number is 0-1200. In actual use, when the signal strength value Strength.
	232	+Range: 0 ~~ 14 pH
233	233
	234	+**Example:**
234	234
235		-**Example**:
	236	+(% style="color:#037691" %)** 0x02B7(H) = 695(D) = 6.95pH**
236	236
237		-If the data you get from the register is 0x0B 0xEA, the distance between the sensor and the measured object is 0BEA(H) = 3050 (D)/10 = 305cm.
238	238
239	239
	240	+=== 2.3.4 Soil Temperature ===
240	240
241		-=== 2.3.4  Distance signal strength ===
	242	+Get Soil Temperature
242	242
243		-Refers to the signal strength, the default output value will be between 0-65535. When the distance measurement gear is fixed, the farther the distance measurement is, the lower the signal strength; the lower the target reflectivity, the lower the signal strength. When Strength is greater than 100 and not equal to 65535, the measured value of Dist is considered credible.
244	244
245		-
246	246	**Example**:
247	247
248		-If payload is: 01D7(H)=471(D), distance signal strength=471, 471>100,471≠65535, the measured value of Dist is considered credible.
	247	+If payload is: **0105H**:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
249	249
250		-Customers can judge whether they need to adjust the environment based on the signal strength.
	249	+If payload is: **FF3FH** :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
251	251
252	252
253	253