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9 9  
10 10  
11 -
12 12  **Table of Contents:**
13 13  
14 14  {{toc/}}
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568 568  === 3.3.7 Uplink on Interrupt ===
569 569  
570 570  
571 -
572 572  RS485-LN support external Interrupt uplink since hardware v1.2 release.
573 573  
574 574  (% aria-label="1654157342174-798.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1654157342174-798.png||data-widget="image"]](% style="background-image:url(http://wiki.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]]
575 575  
578 +(% title="Click and drag to resize" %)​(%%)When there is a high voltage (3.3v and above, the maximum is 24V, but not more than 12v is recommended) on (% style="color:blue" %)**INT**(%%) pin. At this point, an interrupt is triggered and the Device will send an uplink packet.
576 576  
577 -==== 3.3.7.1 Set Interrupt Mode ====
578 -
579 -
580 -Before using the interrupt function of the **INT** pin, users can set the interrupt triggering mode as required.
581 -
582 -(% style="color:blue" %)**AT command:**
583 -
584 -* (% style="color:#037691" %)**AT+INTMOD **(%%) ~/~/ Set the trigger interrupt mode
585 -
586 -* (% style="color:#037691" %)**AT+INTMOD=0 **(%%) ~/~/ Disable Interrupt
587 -
588 -* (% style="color:#037691" %)**AT+INTMOD=1 **(%%) ~/~/ Trigger by rising and falling edge
589 -
590 -* (% style="color:#037691" %)**AT+INTMOD=2 **(%%) ~/~/ Trigger by falling edge **(default)**
591 -
592 -* (% style="color:#037691" %)**AT+INTMOD=3  **(%%) ~/~/ Trigger by rising edge
593 -
594 -(% style="color:blue" %)**Downlink Commands: **(% style="color:#037691" %)**0x06**
595 -
596 -Format: Command Code (0x06) followed by 3 bytes.
597 -
598 -Example1:  Downlink Payload: **06 00 00 01    **~/~/ AT+INTMOD=1
599 -
600 -Example2:  Downlink Payload: **06 00 00 03    **~/~/AT+INTMOD=3
601 -
602 -
603 -==== 3.3.7.2 Practical application ====
604 -
605 -
606 -The following uses the default interrupt triggering mode (% style="color:blue" %)**(AT+INTMOD=2)**(%%) as an example to show the interrupt function of (% style="color:blue" %)**INT**(%%):
607 -
608 -When a high voltage is given to the INT pin and then the level of the (% style="color:blue" %)**INT**(%%) pin changes from high to low, the interrupt is triggered by a falling edge and the RS485-LN sends an uplink data.
609 -
610 -(% style="color:red" %)**Note: The level that triggers the interrupt ranges from 3.3V to 24V. Generally, it is recommended to use less than 12V.**
611 -
612 612  **Example:**
613 613  
614 614  * Use a dry contact to connect the (% style="color:blue" %)**INT**(%%) pin and (% style="color:blue" %)**VIN+**(%%) pin of the RS485-LN.
615 615  
616 -When the dry contact is closed, INT and VIN+ conduct and INT is high.
584 +When the dry contact is closed, INT and VIN+ conduct, and INT goes high, which triggers an interrupt, and the node sends an uplink message.
617 617  
618 -Disconnecting the dry contact, the level of the INT pin changes from high to low, triggering an interrupt (triggered along the falling edge), and the RS485-LN sends an uplink data.
619 619  
620 -[[image:image-20240925174124-5.jpeg||height="439" width="703"]]
621 621  
622 -* Use a regulated power supply or a wet contact to connect the 485-LN to trigger the interruption.(This section uses a regulated power supply as an example.)
623 623  
624 -The positive pole of the stabilized power supply is connected to the (% style="color:blue" %)**INT**(%%) pin of RS485-LN, and the negative pole of the stabilized power supply is connected to the (% style="color:blue" %)**VIN-**(%%) pin of RS485-LN.
625 -
626 -When the regulated power supply is operating, a high voltage is given to the INT pin and the INT level is high. When the regulated power supply is turned off, the level of the INT pin changes from
627 -
628 -high to low, at which time an interrupt is triggered (triggered along the falling edge), and the device will send an uplink data.
629 -
630 -[[image:image-20240925173243-4.jpeg||height="404" width="900"]]
631 -
632 -* Example of interrupt data in TTN.
633 -
634 -The first byte of the payload of the interrupted packet is (% style="color:blue" %)**0x81**(%%).
635 -
636 -[[image:image-20240925181010-1.png||height="348" width="953"]]
637 -
638 -
639 639  == 3.4 Uplink Payload ==
640 640  
641 641  
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