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71	71	= 1. Introduction =
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73	73	== 1.1 ​What is LoRaWAN Soil pH Sensor ==
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104	104	* 8500mAh Battery for long term use
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106	106
107		-
108	108	== 1.3 Probe Specification ==
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126	126	* Length: 3.5 meters
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128	128
129		-
130	130	== 1.4 ​Applications ==
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132	132	* Smart Agriculture
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135		-
136	136	== 1.5 Pin mapping and power on ==
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138	138	[[image:1654592472094-134.png]]
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323		-
324	324	=== 2.3.7 Decode payload in The Things Network ===
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326	326	While using TTN network, you can add the payload format to decode the payload.
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483	483	Always 0x03
484	484	)))
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486	486	User can also send 0x14 downlink command to poll the current calibration payload.
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488	488	[[image:image-20220607171416-7.jpeg]]
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496		-
497	497	== 2.8 Frequency Plans ==
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499	499	(((
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550	550	* 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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553	553	=== 2.8.3 CN470-510 (CN470) ===
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555	555	Used in China, Default use CHE=1
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617	617	* 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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620	620	=== 2.8.5 AS920-923 & AS923-925 (AS923) ===
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622	622	(% style="color:blue" %)**Default Uplink channel:**
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732	732	* Blink once when device transmit a packet.
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735	735	== 2.10 ​Firmware Change Log ==
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788	788	* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
789	789	* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
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791	791	== 3.2 Set Interrupt Mode ==
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793	793	Feature, Set Interrupt mode for GPIO_EXIT.
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807	807	* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
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810	810	== 3.3 Calibrate Sensor ==
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812	812	Detail See [[Calibration Guide>>path:#H2.7Calibration]] for the user of 0x13 and 0x14 downlink commands
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824	824	* Reply to the confirmation package: 26 01
825	825	* Reply to non-confirmed packet: 26 00
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827	827	Device will send an uplink after got this downlink command. With below payload:
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829	829	Configures info payload:
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1047	1047	* (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
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1050	1050	= 9. ​Packing Info =
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1061	1061	* Package Size / pcs : cm
1062	1062	* Weight / pcs : g
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1065	1065	= 10. ​Support =
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1067	1067	* Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.