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547	547	* Check what sub-band the LoRaWAN server ask from the OTAA Join Accept message and switch to that sub-band
548	548	* 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)
549	549
	550	+
	551	+
	552	+
550	550	=== 2.8.3 CN470-510 (CN470) ===
551	551
552	552	Used in China, Default use CHE=1
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613	613	* Check what sub-band the LoRaWAN server ask from the OTAA Join Accept message and switch to that sub-band
614	614	* 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)
615	615
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	620	+
	621	+
616	616	=== 2.8.5 AS920-923 & AS923-925 (AS923) ===
617	617
618	618	(% style="color:blue" %)**Default Uplink channel:**
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727	727	* The sensor is detected when the device is turned on, and it will flash 4 times quickly when it is detected.
728	728	* Blink once when device transmit a packet.
729	729
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	738	+
730	730	== 2.10 ​Firmware Change Log ==
731	731
732	732
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770	770
771	771	(% style="color:#037691" %)**AT Command: AT+TDC**
772	772
	782	+[[image:image-20220607171554-8.png]]
773	773
774		-(% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:710px" %)
775		-|(% style="width:154px" %)**Command Example**|(% style="width:223px" %)**Function**|(% style="width:330px" %)**Response**
776		-|(% style="width:154px" %)AT+TDC=?|(% style="width:223px" %)Show current transmit Interval|(% style="width:330px" %)(((
777		-30000
778	778
779		-OK
780	780
781		-the interval is 30000ms = 30s
782		-)))
783		-|(% style="width:154px" %)AT+TDC=60000|(% style="width:223px" %)Set Transmit Interval|(% style="width:330px" %)(((
784		-OK
785		-
786		-Set transmit interval to 60000ms = 60 seconds
787		-)))
788		-
789	789	(% style="color:#037691" %)**Downlink Command: 0x01**
790	790
791	791	Format: Command Code (0x01) followed by 3 bytes time value.
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795	795	* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
796	796	* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
797	797
	795	+
	796	+
798	798	== 3.2 Set Interrupt Mode ==
799	799
800	800	Feature, Set Interrupt mode for GPIO_EXIT.

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