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429	429	=== 2.6.1 Before measurement ===
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432	432	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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437	437	=== 2.6.2 Measurement ===
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440	440	(% style="color:#4f81bd" %)**Measurement the soil surface:**
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442	442	[[image:1654592946732-634.png]]
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444	444	Choose the proper measuring position. Split the surface soil according to the measured deep.
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446	446	Put pure water, or rainwater to make the soil of measurement point to moist mud. Remove rocks or hard things.
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448	448	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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450	450	Put soil over the probe after insert. And start to measure.
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452	452
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453	453	(% style="color:#4f81bd" %)**Measurement inside soil:**
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455	455	Dig a hole with diameter > 20CM.
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457	457	Insert the probe inside, method like measure the surface.
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484	484
485	485	== 2.7 Calibration ==
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487	487	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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489	489	After stable, user can use below command to calibrate.
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491	491	[[image:image-20220607171149-4.png]]
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494	494	(% style="color:#037691" %)**Calibration Payload**
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496		-(% border="1" cellspacing="10" style="background-color:#ffffcc; width:510px" %)
	523	+(% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:510px" %)
497	497	|(((
498	498	**Size**
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...	...	@@ -578,6 +578,9 @@
578	578	* Check what sub-band the LoRaWAN server ask from the OTAA Join Accept message and switch to that sub-band
579	579	* Use the Join successful sub-band if the server doesn’t include sub-band info in the OTAA Join Accept message ( TTN v2 doesn't include)
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581	581	=== 2.8.3 CN470-510 (CN470) ===
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583	583	Used in China, Default use CHE=1
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647	647
648	648	=== 2.8.5 AS920-923 & AS923-925 (AS923) ===
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650	650	(% style="color:blue" %)**Default Uplink channel:**
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652	652	923.2 - SF7BW125 to SF10BW125
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654	654	923.4 - SF7BW125 to SF10BW125
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657	657	(% style="color:blue" %)**Additional Uplink Channel**:
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659	659	(OTAA mode, channel added by JoinAccept message)
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662	662	(% style="color:blue" %)**AS920~~AS923 for Japan, Malaysia, Singapore**:
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664	664	922.2 - SF7BW125 to SF10BW125
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666	666	922.4 - SF7BW125 to SF10BW125
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668	668	922.6 - SF7BW125 to SF10BW125
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670	670	922.8 - SF7BW125 to SF10BW125
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672	672	923.0 - SF7BW125 to SF10BW125
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674	674	922.0 - SF7BW125 to SF10BW125
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677	677	(% style="color:blue" %)**AS923 ~~ AS925 for Brunei, Cambodia, Hong Kong, Indonesia, Laos, Taiwan, Thailand, Vietnam**:
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679	679	923.6 - SF7BW125 to SF10BW125
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681	681	923.8 - SF7BW125 to SF10BW125
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683	683	924.0 - SF7BW125 to SF10BW125
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685	685	924.2 - SF7BW125 to SF10BW125
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687	687	924.4 - SF7BW125 to SF10BW125
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689	689	924.6 - SF7BW125 to SF10BW125
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692	692	(% style="color:blue" %)**Downlink:**
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694	694	Uplink channels 1-8 (RX1)
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696	696	923.2 - SF10BW125 (RX2)
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