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217		-=== 2.3.2 DS18B20 Temperature sensor ===
	217	+=== 2.3.2  DS18B20 Temperature sensor ===
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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.
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230		-=== 2.3.3 Soil pH ===
	230	+=== 2.3.3  Distance ===
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232		-Range: 0 ~~ 14 pH
	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.
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234		-**Example:**
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236		-(% style="color:#037691" %)** 0x02B7(H) = 695(D) = 6.95pH**
	235	+**Example**:
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	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.
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240		-=== 2.3.4 Soil Temperature ===
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242		-Get Soil Temperature
	241	+=== 2.3.4  Distance signal strength ===
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	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.
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	245	+
245	245	**Example**:
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247		-If payload is: **0105H**:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
	248	+If payload is: 01D7(H)=471(D), distance signal strength=471, 471>100,471≠65535, the measured value of Dist is considered credible.
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249		-If payload is: **FF3FH** :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
	250	+Customers can judge whether they need to adjust the environment based on the signal strength.
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