# How to prevent trigger from happening until reset

**URL:** <https://discourse.nodered.org/t/how-to-prevent-trigger-from-happening-until-reset/80524>\
**Category:** General\
**Created:** [12 August 2023 22:38 UTC](https://discourse.nodered.org/t/how-to-prevent-trigger-from-happening-until-reset/80524 "2023-08-12T22:38:29Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![rmystique](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/rmystique/32/84365_2.png) [@rmystique](https://discourse.nodered.org/u/rmystique)\
**Post date:** [12 August 2023 22:38 UTC](https://discourse.nodered.org/t/how-to-prevent-trigger-from-happening-until-reset/80524/1 "2023-08-12T22:38:29Z")

</div>

This what i have, i want it to send a pulse when the input is under 21, and then wait until the input is above 24 before sending another pulse, where each trigger prevents the itself from happening again until the other one gets triggered. It is for a battery shutoff, so when the battery goes under 21volts it sends a pulse that turns off the power and when the battery is above 24 again it will send a pulse to turn the power back on.

```auto
[
    {
        "id": "f0326ee0294ff5c1",
        "type": "rpi-gpio out",
        "z": "f672d0ac69fd5b97",
        "name": "Relay output",
        "pin": "4",
        "set": true,
        "level": "0",
        "freq": "",
        "out": "out",
        "bcm": true,
        "x": 490,
        "y": 660,
        "wires": []
    },
    {
        "id": "9ff92398d9234754",
        "type": "switch",
        "z": "f672d0ac69fd5b97",
        "name": "21-off, 24-on",
        "property": "payload",
        "propertyType": "msg",
        "rules": [
            {
                "t": "lt",
                "v": "21",
                "vt": "num"
            },
            {
                "t": "gt",
                "v": "24",
                "vt": "num"
            }
        ],
        "checkall": "true",
        "repair": false,
        "outputs": 2,
        "x": 130,
        "y": 660,
        "wires": [
            [
                "6b613274f98aac45"
            ],
            [
                "55e1e1d4d98c78ac"
            ]
        ]
    },
    {
        "id": "6b613274f98aac45",
        "type": "trigger",
        "z": "f672d0ac69fd5b97",
        "name": "",
        "op1": "1",
        "op2": "0",
        "op1type": "num",
        "op2type": "str",
        "duration": "1",
        "extend": false,
        "overrideDelay": false,
        "units": "s",
        "reset": "",
        "bytopic": "all",
        "topic": "topic",
        "outputs": 1,
        "x": 320,
        "y": 640,
        "wires": [
            [
                "f0326ee0294ff5c1"
            ]
        ]
    },
    {
        "id": "55e1e1d4d98c78ac",
        "type": "trigger",
        "z": "f672d0ac69fd5b97",
        "name": "",
        "op1": "1",
        "op2": "0",
        "op1type": "num",
        "op2type": "str",
        "duration": "1",
        "extend": false,
        "overrideDelay": false,
        "units": "s",
        "reset": "",
        "bytopic": "all",
        "topic": "topic",
        "outputs": 1,
        "x": 320,
        "y": 680,
        "wires": [
            [
                "f0326ee0294ff5c1"
            ]
        ]
    }
]

```

---

<div class="post-metadata">

**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [12 August 2023 22:57 UTC](https://discourse.nodered.org/t/how-to-prevent-trigger-from-happening-until-reset/80524/2 "2023-08-12T22:57:26Z")

</div>

Use the RBE (filter) node

```auto
[{"id":"9ff92398d9234754","type":"switch","z":"b7b8756f264f62df","name":"21-off, 24-on","property":"payload","propertyType":"msg","rules":[{"t":"lt","v":"21","vt":"num"},{"t":"gt","v":"24","vt":"num"}],"checkall":"true","repair":false,"outputs":2,"x":1500,"y":160,"wires":[["0048f0da792e9465"],["7df35e22ffa6dbaa"]]},{"id":"875ba3740cb42ba2","type":"inject","z":"b7b8756f264f62df","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"5","payloadType":"num","x":1290,"y":80,"wires":[["9ff92398d9234754"]]},{"id":"c2c298d059b81d08","type":"inject","z":"b7b8756f264f62df","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"20","payloadType":"num","x":1290,"y":140,"wires":[["9ff92398d9234754"]]},{"id":"1b744d8141e59e19","type":"inject","z":"b7b8756f264f62df","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"22","payloadType":"num","x":1290,"y":200,"wires":[["9ff92398d9234754"]]},{"id":"231bb08190b04afc","type":"inject","z":"b7b8756f264f62df","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"26","payloadType":"num","x":1290,"y":260,"wires":[["9ff92398d9234754"]]},{"id":"6b613274f98aac45","type":"trigger","z":"b7b8756f264f62df","name":"","op1":"1","op2":"0","op1type":"num","op2type":"num","duration":"1","extend":false,"overrideDelay":false,"units":"s","reset":"","bytopic":"all","topic":"topic","outputs":1,"x":1720,"y":280,"wires":[["69840e220ade3d79"]]},{"id":"05eda27ef23bf347","type":"rbe","z":"b7b8756f264f62df","name":"","func":"rbe","gap":"","start":"","inout":"out","septopics":true,"property":"payload","topi":"topic","x":1870,"y":160,"wires":[["6b613274f98aac45"]]},{"id":"0048f0da792e9465","type":"change","z":"b7b8756f264f62df","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"true","tot":"bool"}],"action":"","property":"","from":"","to":"","reg":false,"x":1700,"y":120,"wires":[["05eda27ef23bf347"]]},{"id":"7df35e22ffa6dbaa","type":"change","z":"b7b8756f264f62df","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"false","tot":"bool"}],"action":"","property":"","from":"","to":"","reg":false,"x":1700,"y":200,"wires":[["05eda27ef23bf347"]]},{"id":"69840e220ade3d79","type":"debug","z":"b7b8756f264f62df","name":"debug 2","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":1880,"y":280,"wires":[]}]

```

![chrome_brELMP3DYg](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/e/c/ec9f81ec6230522fd2343d2d69f05ce8937cc4ee.gif)

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [26 August 2023 22:57 UTC](https://discourse.nodered.org/t/how-to-prevent-trigger-from-happening-until-reset/80524/3 "2023-08-26T22:57:27Z")

</div>

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