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616	616	* Check what sub-band the LoRaWAN server ask from the OTAA Join Accept message and switch to that sub-band
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)
618	618
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	620	+
	621	+
619	619	=== 2.8.5 AS920-923 & AS923-925 (AS923) ===
620	620
621	621	(% style="color:blue" %)**Default Uplink channel:**
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730	730	* The sensor is detected when the device is turned on, and it will flash 4 times quickly when it is detected.
731	731	* Blink once when device transmit a packet.
732	732
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	738	+
733	733	== 2.10 ​Firmware Change Log ==
734	734
735	735
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773	773
774	774	(% style="color:#037691" %)**AT Command: AT+TDC**
775	775
	782	+[[image:image-20220607171554-8.png]]
776	776
777		-(% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:710px" %)
778		-|(% style="width:154px" %)**Command Example**|(% style="width:223px" %)**Function**|(% style="width:330px" %)**Response**
779		-|(% style="width:154px" %)AT+TDC=?|(% style="width:223px" %)Show current transmit Interval|(% style="width:330px" %)(((
780		-30000
781	781
782		-OK
783	783
784		-the interval is 30000ms = 30s
785		-)))
786		-|(% style="width:154px" %)AT+TDC=60000|(% style="width:223px" %)Set Transmit Interval|(% style="width:330px" %)(((
787		-OK
788		-
789		-Set transmit interval to 60000ms = 60 seconds
790		-)))
791		-
792	792	(% style="color:#037691" %)**Downlink Command: 0x01**
793	793
794	794	Format: Command Code (0x01) followed by 3 bytes time value.
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798	798	* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
799	799	* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
800	800
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	796	+
801	801	== 3.2 Set Interrupt Mode ==
802	802
803	803	Feature, Set Interrupt mode for GPIO_EXIT.

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