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400	400	[[image:1654592856403-259.png]]
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403	403	(% style="color:blue" %)**Step 5**(%%)**: add payload decode**
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405	405	Download Datacake decoder from: [[https:~~/~~/www.dragino.com/downloads/index.pHp?dir=LoRa_End_Node/LSPH01/Decoder/>>url:https://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSNPK01/Decoder/]]
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408	408	[[image:1654592878525-845.png]]
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425	425	=== 2.6.1 Before measurement ===
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428	428	If the LSPH01 has more than 7 days not use or just clean the pH probe. User should put the probe inside pure water for more than 24 hours for activation. If no put in water, user need to put inside soil for more than 24 hours to ensure the measurement accuracy.
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433	433	=== 2.6.2 Measurement ===
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436	436	(% style="color:#4f81bd" %)**Measurement the soil surface:**
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438	438	[[image:1654592946732-634.png]]
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440	440	Choose the proper measuring position. Split the surface soil according to the measured deep.
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442	442	Put pure water, or rainwater to make the soil of measurement point to moist mud. Remove rocks or hard things.
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444	444	Slowly insert the probe to the measure point. Don’t use large force which will break the probe. Make sure not shake when inserting.
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446	446	Put soil over the probe after insert. And start to measure.
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449	449	(% style="color:#4f81bd" %)**Measurement inside soil:**
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451	451	Dig a hole with diameter > 20CM.
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453	453	Insert the probe inside, method like measure the surface.
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481	481	== 2.7 Calibration ==
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483	483	User can do calibration for the probe. It is limited to use below pH buffer solution to calibrate: 4.00, 6.86, 9.18. When calibration, user need to clean the electrode and put the probe in the pH buffer solution to wait the value stable ( a new clean electrode might need max 24 hours to be stable).
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485	485	After stable, user can use below command to calibrate.
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487	487	[[image:image-20220607171149-4.png]]
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490	490	(% style="color:#037691" %)**Calibration Payload**
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492		-(% border="1" cellspacing="10" style="background-color:#ffffcc; width:510px" %)
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494	494	**Size**
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