# Start the dropdown values on button click

**URL:** <https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423>\
**Category:** General\
**Created:** [20 January 2021 09:34 UTC](https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423 "2021-01-20T09:34:40Z")\
**Posts on this page:** 18\
**Page:** 2

<div class="post-metadata">

**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [29 January 2021 13:33 UTC](https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423/22 "2021-01-29T13:33:07Z")

</div>

The error says, as I presume you know, that the gpio node has been given something that is Not a Number (NaN).  
Add debug nodes and work backwards up the flow until you find at which node the problem is arising. Then look at the inputs to that node and work out why that is happening. If you can't work it out then show us what the input to the node is and what output it is getting.

**[Edit]** Hint: I would start by looking at flow.start and what you are doing with it. Any message that you send to the GPIO pin must contain a number in msg.payload.

---

<div class="post-metadata">

**Author:** ![sanket](https://avatars.discourse-cdn.com/v4/letter/s/57b2e6/32.png) [@sanket](https://discourse.nodered.org/u/sanket)\
**Post date:** [30 January 2021 07:54 UTC](https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423/23 "2021-01-30T07:54:12Z")

</div>

![2021-01-30-131602_1920x1080_scrot](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/7/c/7c707897ecf2768c7d7ae60b12f945752730e99b.png)

i tried as you said , and got speed variation(KM/HR) dropdown value on gpio pwm pin.  
But its not getting trigger value time selection (PICK THE TIME) dropdown on gpio pwm pin.

---

<div class="post-metadata">

**Author:** ![E1cid](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/e1cid/32/77971_2.png) [@E1cid](https://discourse.nodered.org/u/E1cid)\
**Post date:** [30 January 2021 09:06 UTC](https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423/24 "2021-01-30T09:06:39Z")

</div>

Ok now we have a simpler flow and we can see the issue. you are passing on the object flow.start and not splitting it up again. i also added a better delay as no need for all those triggers and the switch node.

```auto
[{"id":"1ad9dfd.a1875a","type":"change","z":"a2d9cfcc.919dd8","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"start","tot":"flow"},{"t":"set","p":"delay","pt":"msg","to":"payload.time * 1000","tot":"jsonata"},{"t":"set","p":"payload","pt":"msg","to":"payload.km","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":510,"y":1000,"wires":[["20fd489b.c29c18"]]},{"id":"e7cfe072.17193","type":"ui_button","z":"a2d9cfcc.919dd8","name":"","group":"2f23efef.2028b8","order":10,"width":6,"height":2,"passthru":true,"label":"start","tooltip":"","color":"","bgcolor":"","icon":"","payload":"start","payloadType":"str","topic":"","x":350,"y":1000,"wires":[["1ad9dfd.a1875a"]]},{"id":"20fd489b.c29c18","type":"trigger","z":"a2d9cfcc.919dd8","name":"","op1":"1","op2":"","op1type":"str","op2type":"payl","duration":"100","extend":false,"units":"ms","reset":"","bytopic":"all","topic":"topic","outputs":2,"x":710,"y":1000,"wires":[["1bc8c708.8d4999"],["6432888e.605e5"]]},{"id":"ec09be9c.32351","type":"inject","z":"a2d9cfcc.919dd8","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":210,"y":1000,"wires":[["e7cfe072.17193"]]},{"id":"6432888e.605e5","type":"delay","z":"a2d9cfcc.919dd8","name":"","pauseType":"delayv","timeout":"5","timeoutUnits":"seconds","rate":"1","nbRateUnits":"1","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":false,"x":1000,"y":1000,"wires":[["79a113fb.bd1a84"]]},{"id":"1bc8c708.8d4999","type":"change","z":"a2d9cfcc.919dd8","name":"","rules":[{"t":"set","p":"reset","pt":"msg","to":"true","tot":"bool"}],"action":"","property":"","from":"","to":"","reg":false,"x":850,"y":940,"wires":[["6432888e.605e5"]]},{"id":"79a113fb.bd1a84","type":"debug","z":"a2d9cfcc.919dd8","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":1050,"y":860,"wires":[]},{"id":"309fe7b0.cc9648","type":"change","z":"a2d9cfcc.919dd8","name":"","rules":[{"t":"set","p":"start","pt":"flow","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":650,"y":800,"wires":[[]]},{"id":"eff140b6.620c98","type":"join","z":"a2d9cfcc.919dd8","name":"","mode":"custom","build":"object","property":"payload","propertyType":"msg","key":"topic","joiner":"\\n","joinerType":"str","accumulate":true,"timeout":"","count":"2","reduceRight":false,"reduceExp":"","reduceInit":"","reduceInitType":"","reduceFixup":"","x":490,"y":800,"wires":[["309fe7b0.cc9648"]]},{"id":"209df910.3e5de6","type":"ui_dropdown","z":"a2d9cfcc.919dd8","name":"","label":"KM/HR","tooltip":"","place":"Select option","group":"2f23efef.2028b8","order":7,"width":6,"height":1,"passthru":true,"multiple":false,"options":[{"label":"","value":"10","type":"str"},{"label":"","value":"20","type":"str"},{"label":"","value":"30","type":"str"},{"label":"","value":"40","type":"str"},{"label":"","value":"50","type":"str"},{"label":"","value":"60","type":"str"},{"label":"","value":"70","type":"str"},{"label":"","value":"80","type":"str"},{"label":"","value":"90","type":"str"},{"label":"","value":"100","type":"str"}],"payload":"","topic":"km","x":320,"y":800,"wires":[["eff140b6.620c98"]]},{"id":"105cc283.982e35","type":"inject","z":"a2d9cfcc.919dd8","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"30","payloadType":"num","x":190,"y":800,"wires":[["209df910.3e5de6"]]},{"id":"8a180ca.efbaa7","type":"inject","z":"a2d9cfcc.919dd8","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"300","payloadType":"num","x":130,"y":700,"wires":[["d7ffc874.69cdc"]]},{"id":"d7ffc874.69cdc","type":"ui_dropdown","z":"a2d9cfcc.919dd8","name":"","label":"Pick the Time","tooltip":"","place":"-","group":"2f23efef.2028b8","order":3,"width":6,"height":1,"passthru":true,"multiple":false,"options":[{"label":"5 min","value":300,"type":"num"},{"label":"10 min","value":600,"type":"num"},{"label":"15 min","value":900,"type":"num"},{"label":"20 min","value":1200,"type":"num"},{"label":"25 min","value":1500,"type":"num"},{"label":"30 min","value":1800,"type":"num"}],"payload":"","topic":"time","x":310,"y":700,"wires":[["eff140b6.620c98"]]},{"id":"2f23efef.2028b8","type":"ui_group","z":"","name":"Default","tab":"86fced02.85abd","order":1,"disp":false,"width":18,"collapse":false},{"id":"86fced02.85abd","type":"ui_tab","z":"","name":"USER","icon":"dashboard","order":4,"disabled":false,"hidden":false}]

```

---

<div class="post-metadata">

**Author:** ![sanket](https://avatars.discourse-cdn.com/v4/letter/s/57b2e6/32.png) [@sanket](https://discourse.nodered.org/u/sanket)\
**Post date:** [2 February 2021 04:56 UTC](https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423/25 "2021-02-02T04:56:46Z")

</div>

![2021-01-30-180304_1920x1080_scrot](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/4/d/4d6685d2ac02044c2d5fdb85a8dcfcb87e8e2670.png)

Sorry for late reply...  
I tried your flow but nothing is showing in debug window and raspberry pi gpio pwm pin...

---

<div class="post-metadata">

**Author:** ![E1cid](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/e1cid/32/77971_2.png) [@E1cid](https://discourse.nodered.org/u/E1cid)\
**Post date:** [2 February 2021 08:49 UTC](https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423/26 "2021-02-02T08:49:30Z")

</div>

started

 ![Screenshot_20210202-083848](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/f/9/f9b2268e56cc5f92ae0c830fcb87b37d6c13c14b.png)

300 seconds later

 ![Screenshot_20210202-084536](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/6/3/636d3e9e93378d7b11dc8e9b83c66717e25e6de4.png)  
So you must have a setting wrong as yours shows reset.  
As i can tell nothing else from an image, you will need to post more info.

---

<div class="post-metadata">

**Author:** ![sanket](https://avatars.discourse-cdn.com/v4/letter/s/57b2e6/32.png) [@sanket](https://discourse.nodered.org/u/sanket)\
**Post date:** [2 February 2021 09:42 UTC](https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423/27 "2021-02-02T09:42:35Z")

</div>

I have changed nothing in the flow given by you...  
I want to use both dropdown values simultaneously... i don't want delay... i want trigger time using dropdown with the speed of pwm gpio pin km/hrs...

I am working on treadmill programming so what i actually want to do is :-

1. first i want to do programming of time period, that's the reason i used trigger and dropdown node.  
I want to give trigger time to motor.

2. second dropdown node value will be used to give speed to motor.

3. When start button is clicked motor should run at the given speed till the given time.

It is normal treadmiill function.

---

<div class="post-metadata">

**Author:** ![E1cid](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/e1cid/32/77971_2.png) [@E1cid](https://discourse.nodered.org/u/E1cid)\
**Post date:** [2 February 2021 09:57 UTC](https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423/28 "2021-02-02T09:57:46Z")

</div>

> [@sanket](#):
>
> I have changed nothing in the flow given by you...

If this is true then the flow should work.

Again with out info to look at i can tell nothing. I still await info i can use to help you. (maybe the flow and some debugs would help to see issue)

[edit]  
to start at 30 for 300 seconds just change links and output 0 from trigger on second output. e.g.

```auto
[{"id":"df03edd6.500e2","type":"ui_dropdown","z":"57675e72.26a0d8","name":"","label":"KM/HR","tooltip":"","place":"Select option","group":"b2d54252.b73b08","order":7,"width":6,"height":1,"passthru":true,"multiple":false,"options":[{"label":"","value":"10","type":"str"},{"label":"","value":"20","type":"str"},{"label":"","value":"30","type":"str"},{"label":"","value":"40","type":"str"},{"label":"","value":"50","type":"str"},{"label":"","value":"60","type":"str"},{"label":"","value":"70","type":"str"},{"label":"","value":"80","type":"str"},{"label":"","value":"90","type":"str"},{"label":"","value":"100","type":"str"}],"payload":"","topic":"km","x":240,"y":3500,"wires":[["572cde5d.03af08"]]},{"id":"572cde5d.03af08","type":"join","z":"57675e72.26a0d8","name":"","mode":"custom","build":"object","property":"payload","propertyType":"msg","key":"topic","joiner":"\\n","joinerType":"str","accumulate":true,"timeout":"","count":"2","reduceRight":false,"reduceExp":"","reduceInit":"","reduceInitType":"","reduceFixup":"","x":410,"y":3500,"wires":[["d5f36ada.2fa748"]]},{"id":"b41d75d4.992ca","type":"inject","z":"57675e72.26a0d8","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"30","payloadType":"num","x":270,"y":3540,"wires":[["df03edd6.500e2"]]},{"id":"d5f36ada.2fa748","type":"change","z":"57675e72.26a0d8","name":"","rules":[{"t":"set","p":"start","pt":"flow","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":570,"y":3500,"wires":[[]]},{"id":"d550cd25.09e51","type":"ui_dropdown","z":"57675e72.26a0d8","name":"","label":"Pick the Time","tooltip":"","place":"-","group":"b2d54252.b73b08","order":3,"width":6,"height":1,"passthru":true,"multiple":false,"options":[{"label":"5 min","value":300,"type":"num"},{"label":"10 min","value":600,"type":"num"},{"label":"15 min","value":900,"type":"num"},{"label":"20 min","value":1200,"type":"num"},{"label":"25 min","value":1500,"type":"num"},{"label":"30 min","value":1800,"type":"num"}],"payload":"","topic":"time","x":230,"y":3400,"wires":[["572cde5d.03af08"]]},{"id":"2f76a29b.a97ebe","type":"inject","z":"57675e72.26a0d8","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"300","payloadType":"num","x":250,"y":3460,"wires":[["d550cd25.09e51"]]},{"id":"90218ecd.e20a18","type":"ui_button","z":"57675e72.26a0d8","name":"","group":"b2d54252.b73b08","order":10,"width":6,"height":2,"passthru":true,"label":"start","tooltip":"","color":"","bgcolor":"","icon":"","payload":"start","payloadType":"str","topic":"","x":270,"y":3700,"wires":[["20c35540.716ba2"]]},{"id":"596448bf.f07388","type":"inject","z":"57675e72.26a0d8","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":290,"y":3640,"wires":[["90218ecd.e20a18"]]},{"id":"20c35540.716ba2","type":"change","z":"57675e72.26a0d8","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"start","tot":"flow"},{"t":"set","p":"delay","pt":"msg","to":"payload.time * 1000","tot":"jsonata"},{"t":"set","p":"payload","pt":"msg","to":"payload.km","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":430,"y":3700,"wires":[["110788af.a7b34f"]]},{"id":"110788af.a7b34f","type":"trigger","z":"57675e72.26a0d8","name":"","op1":"","op2":"0","op1type":"pay","op2type":"num","duration":"100","extend":false,"units":"ms","reset":"","bytopic":"all","topic":"topic","outputs":2,"x":630,"y":3700,"wires":[["c797ea0e.467bd8","a38eca46.4ddc08"],["81300a29.84783"]]},{"id":"c797ea0e.467bd8","type":"change","z":"57675e72.26a0d8","name":"","rules":[{"t":"set","p":"reset","pt":"msg","to":"true","tot":"bool"}],"action":"","property":"","from":"","to":"","reg":false,"x":830,"y":3680,"wires":[["81300a29.84783"]]},{"id":"81300a29.84783","type":"delay","z":"57675e72.26a0d8","name":"","pauseType":"delayv","timeout":"5","timeoutUnits":"seconds","rate":"1","nbRateUnits":"1","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":false,"x":860,"y":3740,"wires":[["a38eca46.4ddc08"]]},{"id":"a38eca46.4ddc08","type":"debug","z":"57675e72.26a0d8","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":970,"y":3560,"wires":[]},{"id":"b2d54252.b73b08","type":"ui_group","z":"","name":"Default","tab":"ff26331e.3d5ae","order":1,"disp":false,"width":18,"collapse":false},{"id":"ff26331e.3d5ae","type":"ui_tab","z":"","name":"USER","icon":"dashboard","order":4,"disabled":false,"hidden":false}]

```

start

 ![Screenshot_20210202-101844](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/6/e/6ebeaec2203e51682698a348dfc21f464f1d7a60.png)  
300 secs later  
 ![Screenshot_20210202-102237](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/a/4/a4adce2fa12e2add835018df536e04dd84394791.png)

---

<div class="post-metadata">

**Author:** ![sanket](https://avatars.discourse-cdn.com/v4/letter/s/57b2e6/32.png) [@sanket](https://discourse.nodered.org/u/sanket)\
**Post date:** [2 February 2021 10:38 UTC](https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423/29 "2021-02-02T10:38:20Z")

</div>

![2021-01-29-184212_1920x1080_scrot (1)](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/1/9/1962c28412978b20ae233f37ac98b6adce5f955d.png)

 ![2021-01-29-184212_1920x1080_scrot](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/2/d/2d2a6ccd824a6c33f3555b1808322b5fb17beef8.png)

i have two dropdown nodes...  
one for time selection (PICK THE TIME) dropdown and one for speed variation(KM/HR) dropdown...  
both dropdown values are given to raspberry pi pwm pin...  
if both dropdown value are given to the same gpio pwm pin...  
then i face "Invalid input: NaN" issue...

```auto
[{"id":"66f70775.fd6848","type":"ui_dropdown","z":"f6e684c3.a68d78","name":"","label":"Pick the Time","tooltip":"","place":"-","group":"75ebe64b.2bbd88","order":3,"width":6,"height":1,"passthru":true,"multiple":false,"options":[{"label":"5 min","value":300,"type":"num"},{"label":"10 min","value":600,"type":"num"},{"label":"15 min","value":900,"type":"num"},{"label":"20 min","value":1200,"type":"num"},{"label":"25 min","value":1500,"type":"num"},{"label":"30 min","value":1800,"type":"num"}],"payload":"","topic":"time","x":120,"y":140,"wires":[["3eabcd42.651ce2","73b25b7a.60ff84"]]},{"id":"3eabcd42.651ce2","type":"change","z":"f6e684c3.a68d78","name":"","rules":[{"t":"set","p":"topic","pt":"msg","to":"control","tot":"str"},{"t":"set","p":"payload","pt":"msg","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":340,"y":140,"wires":[["de04d10c.d2696"]]},{"id":"de04d10c.d2696","type":"countdown","z":"f6e684c3.a68d78","name":"","topic":"","payloadTimerStart":"true","payloadTimerStartType":"bool","payloadTimerStop":"false","payloadTimerStopType":"bool","timer":"30","resetWhileRunning":false,"setTimeToNewWhileRunning":true,"startCountdownOnControlMessage":false,"x":350,"y":60,"wires":[[],["e307ee07.6dfc6"]]},{"id":"e307ee07.6dfc6","type":"ui_text","z":"f6e684c3.a68d78","group":"75ebe64b.2bbd88","order":7,"width":6,"height":1,"name":"","label":"Time:","format":"{{msg.payload}}","layout":"row-spread","x":530,"y":67,"wires":[]},{"id":"461caede.5d061","type":"link out","z":"f6e684c3.a68d78","name":"to Relay","links":["5566747c.9f064c","f752cea5.b26c2"],"x":960,"y":140,"wires":[],"l":true},{"id":"4f6fbf86.23b4d","type":"ui_dropdown","z":"f6e684c3.a68d78","name":"","label":"KM/HR","tooltip":"","place":"Select option","group":"75ebe64b.2bbd88","order":7,"width":6,"height":1,"passthru":true,"multiple":false,"options":[{"label":"","value":"10","type":"str"},{"label":"","value":"20","type":"str"},{"label":"","value":"30","type":"str"},{"label":"","value":"40","type":"str"},{"label":"","value":"50","type":"str"},{"label":"","value":"60","type":"str"},{"label":"","value":"70","type":"str"},{"label":"","value":"80","type":"str"},{"label":"","value":"90","type":"str"},{"label":"","value":"100","type":"str"}],"payload":"","topic":"km","x":540,"y":140,"wires":[["ce29dd8e.e7671","92148e81.280ca"]]},{"id":"ce29dd8e.e7671","type":"ui_numeric","z":"f6e684c3.a68d78","name":"","label":"Set Speed","tooltip":"","group":"e5aacdef.f9e53","order":12,"width":6,"height":1,"wrap":false,"passthru":true,"topic":"","format":"{{value}}","min":0,"max":"100","step":"5","x":750,"y":140,"wires":[["461caede.5d061"]]},{"id":"664125ce.a7cd7c","type":"trigger","z":"f6e684c3.a68d78","op1":"0","op2":"","op1type":"str","op2type":"str","duration":"300","extend":false,"units":"s","reset":"","bytopic":"all","name":"","x":650,"y":380,"wires":[["def58827.a0e168"]]},{"id":"f9391ca2.aa287","type":"trigger","z":"f6e684c3.a68d78","op1":"0","op2":"","op1type":"str","op2type":"str","duration":"600","extend":false,"units":"s","reset":"","bytopic":"all","name":"","x":650,"y":440,"wires":[["def58827.a0e168"]]},{"id":"34731956.e26c56","type":"switch","z":"f6e684c3.a68d78","name":"","property":"payload","propertyType":"msg","rules":[{"t":"eq","v":"300","vt":"num"},{"t":"eq","v":"600","vt":"num"},{"t":"eq","v":"900","vt":"num"},{"t":"eq","v":"1200","vt":"num"},{"t":"eq","v":"1500","vt":"num"},{"t":"eq","v":"1800","vt":"num"}],"checkall":"true","repair":false,"outputs":6,"x":390,"y":520,"wires":[["664125ce.a7cd7c"],["f9391ca2.aa287"],["bf7bd0ac.3aed8"],["3e34d4c0.3744dc"],["3a447976.dc3716"],["10a95e2a.a33a42"]]},{"id":"def58827.a0e168","type":"rpi-gpio out","z":"f6e684c3.a68d78","name":"","pin":"12","set":"","level":"0","freq":"","out":"pwm","x":960,"y":540,"wires":[]},{"id":"bf7bd0ac.3aed8","type":"trigger","z":"f6e684c3.a68d78","op1":"0","op2":"","op1type":"str","op2type":"str","duration":"900","extend":false,"units":"s","reset":"","bytopic":"all","name":"","x":650,"y":500,"wires":[["def58827.a0e168"]]},{"id":"3e34d4c0.3744dc","type":"trigger","z":"f6e684c3.a68d78","op1":"0","op2":"","op1type":"str","op2type":"str","duration":"1200","extend":false,"units":"s","reset":"","bytopic":"all","name":"","x":650,"y":560,"wires":[["def58827.a0e168"]]},{"id":"3a447976.dc3716","type":"trigger","z":"f6e684c3.a68d78","op1":"0","op2":"","op1type":"str","op2type":"str","duration":"1500","extend":false,"units":"s","reset":"","bytopic":"all","name":"","x":650,"y":620,"wires":[["def58827.a0e168"]]},{"id":"10a95e2a.a33a42","type":"trigger","z":"f6e684c3.a68d78","op1":"0","op2":"","op1type":"str","op2type":"str","duration":"1800","extend":false,"units":"s","reset":"","bytopic":"all","name":"","x":650,"y":680,"wires":[["def58827.a0e168"]]},{"id":"f752cea5.b26c2","type":"link in","z":"f6e684c3.a68d78","name":"","links":["6dfd925d.c0829c","15549a6d.0d0f66","461caede.5d061"],"x":775,"y":300,"wires":[["def58827.a0e168"]]},{"id":"380aaa8b.7dd886","type":"link in","z":"f6e684c3.a68d78","name":"","links":["15549a6d.0d0f66"],"x":215,"y":519,"wires":[["34731956.e26c56"]]},{"id":"73b25b7a.60ff84","type":"link out","z":"f6e684c3.a68d78","name":"","links":["b1513768.ee8068"],"x":275,"y":200,"wires":[]},{"id":"c17ec965.6fa8c8","type":"ui_button","z":"f6e684c3.a68d78","name":"","group":"75ebe64b.2bbd88","order":10,"width":6,"height":2,"passthru":false,"label":"start","tooltip":"","color":"","bgcolor":"","icon":"","payload":"start","payloadType":"str","topic":"","x":130,"y":780,"wires":[["66061d51.8a0934"]]},{"id":"f74f57d2.1e1508","type":"join","z":"f6e684c3.a68d78","name":"","mode":"custom","build":"object","property":"payload","propertyType":"msg","key":"topic","joiner":"\\n","joinerType":"str","accumulate":true,"timeout":"","count":"2","reduceRight":false,"reduceExp":"","reduceInit":"","reduceInitType":"","reduceFixup":"","x":210,"y":340,"wires":[["39312a1e.c82de6"]]},{"id":"39312a1e.c82de6","type":"change","z":"f6e684c3.a68d78","name":"","rules":[{"t":"set","p":"start","pt":"flow","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":390,"y":340,"wires":[[]]},{"id":"66061d51.8a0934","type":"change","z":"f6e684c3.a68d78","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"start","tot":"flow"}],"action":"","property":"","from":"","to":"","reg":false,"x":360,"y":780,"wires":[["15549a6d.0d0f66"]]},{"id":"b1513768.ee8068","type":"link in","z":"f6e684c3.a68d78","name":"","links":["92148e81.280ca","73b25b7a.60ff84"],"x":435,"y":260,"wires":[["f74f57d2.1e1508"]]},{"id":"92148e81.280ca","type":"link out","z":"f6e684c3.a68d78","name":"","links":["b1513768.ee8068"],"x":640,"y":220,"wires":[]},{"id":"15549a6d.0d0f66","type":"link out","z":"f6e684c3.a68d78","name":"","links":["f752cea5.b26c2","380aaa8b.7dd886"],"x":275,"y":720,"wires":[]},{"id":"75ebe64b.2bbd88","type":"ui_group","z":"","name":"Default","tab":"1806c69.e61a639","order":1,"disp":false,"width":18,"collapse":false},{"id":"e5aacdef.f9e53","type":"ui_group","z":"","name":"User Facility","tab":"334da32c.51b0cc","order":1,"disp":false,"width":18,"collapse":false},{"id":"1806c69.e61a639","type":"ui_tab","z":"","name":"USER","icon":"dashboard","order":4,"disabled":false,"hidden":false},{"id":"334da32c.51b0cc","type":"ui_tab","z":"","name":"Facility","icon":"dashboard","order":5,"disabled":false,"hidden":false}]

```

---

<div class="post-metadata">

**Author:** ![E1cid](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/e1cid/32/77971_2.png) [@E1cid](https://discourse.nodered.org/u/E1cid)\
**Post date:** [2 February 2021 11:21 UTC](https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423/30 "2021-02-02T11:21:12Z")

</div>

Again where is info as to why my example is not working.  
I can not help if you do not supply info.

---

<div class="post-metadata">

**Author:** ![sanket](https://avatars.discourse-cdn.com/v4/letter/s/57b2e6/32.png) [@sanket](https://discourse.nodered.org/u/sanket)\
**Post date:** [2 February 2021 11:36 UTC](https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423/31 "2021-02-02T11:36:49Z")

</div>

![2021-02-02-163923_1920x1080_scrot](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/4/3/43b76cfd248a0b326562c19bc4cbd640d1a95420.png)

this is the resulting output of your given flow...

---

<div class="post-metadata">

**Author:** ![E1cid](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/e1cid/32/77971_2.png) [@E1cid](https://discourse.nodered.org/u/E1cid)\
**Post date:** [2 February 2021 11:52 UTC](https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423/32 "2021-02-02T11:52:16Z")

</div>

I ask one last time export the flow, we need to see settings  
Also can i have the node-red version you are using

---

<div class="post-metadata">

**Author:** ![sanket](https://avatars.discourse-cdn.com/v4/letter/s/57b2e6/32.png) [@sanket](https://discourse.nodered.org/u/sanket)\
**Post date:** [2 February 2021 12:55 UTC](https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423/33 "2021-02-02T12:55:46Z")

</div>

![2021-02-02-181225_1920x1080_scrot](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/7/9/79ea0a9e09b3492afaa15e15693ba39c8c197c8e.png) ![2021-02-02-181233_1920x1080_scrot](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/1/0/1056c833a178800afa117ad462026a8fe4a6c3cc.png)

here is the sccreenshot of my nodered version and user settings

---

<div class="post-metadata">

**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [2 February 2021 13:53 UTC](https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423/34 "2021-02-02T13:53:35Z")

</div>

I think maybe you do not know how to export the flow and paste it here. Select the nodes you wish to share and then select Export \> Copy to Clipboard. Then see this post for how to post it here - [How to share code or flow json](https://discourse.nodered.org/t/how-to-share-code-or-flow-json/506).

---

<div class="post-metadata">

**Author:** ![sanket](https://avatars.discourse-cdn.com/v4/letter/s/57b2e6/32.png) [@sanket](https://discourse.nodered.org/u/sanket)\
**Post date:** [3 February 2021 05:34 UTC](https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423/35 "2021-02-03T05:34:20Z")

</div>

```auto
[{"id":"cbcc618f.7bbd5","type":"tab","label":"Flow 1","disabled":false,"info":""},{"id":"f2f1c488.42ac68","type":"ui_dropdown","z":"cbcc618f.7bbd5","name":"","label":"KM/HR","tooltip":"","place":"Select option","group":"c97091ce.a1898","order":7,"width":6,"height":1,"passthru":true,"multiple":false,"options":[{"label":"","value":"10","type":"str"},{"label":"","value":"20","type":"str"},{"label":"","value":"30","type":"str"},{"label":"","value":"40","type":"str"},{"label":"","value":"50","type":"str"},{"label":"","value":"60","type":"str"},{"label":"","value":"70","type":"str"},{"label":"","value":"80","type":"str"},{"label":"","value":"90","type":"str"},{"label":"","value":"100","type":"str"}],"payload":"","topic":"km","x":180,"y":180,"wires":[["7e5dd7e6.f0cbc8"]]},{"id":"7e5dd7e6.f0cbc8","type":"join","z":"cbcc618f.7bbd5","name":"","mode":"custom","build":"object","property":"payload","propertyType":"msg","key":"topic","joiner":"\\n","joinerType":"str","accumulate":true,"timeout":"","count":"2","reduceRight":false,"reduceExp":"","reduceInit":"","reduceInitType":"","reduceFixup":"","x":350,"y":180,"wires":[["58e448bd.d55ed8"]]},{"id":"782ebde9.8da2d4","type":"inject","z":"cbcc618f.7bbd5","name":"","topic":"","payload":"30","payloadType":"num","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":210,"y":220,"wires":[["f2f1c488.42ac68"]]},{"id":"58e448bd.d55ed8","type":"change","z":"cbcc618f.7bbd5","name":"","rules":[{"t":"set","p":"start","pt":"flow","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":510,"y":180,"wires":[[]]},{"id":"7926ecb4.5eec34","type":"ui_dropdown","z":"cbcc618f.7bbd5","name":"","label":"Pick the Time","tooltip":"","place":"-","group":"c97091ce.a1898","order":3,"width":6,"height":1,"passthru":true,"multiple":false,"options":[{"label":"5 min","value":300,"type":"num"},{"label":"10 min","value":600,"type":"num"},{"label":"15 min","value":900,"type":"num"},{"label":"20 min","value":1200,"type":"num"},{"label":"25 min","value":1500,"type":"num"},{"label":"30 min","value":1800,"type":"num"}],"payload":"","topic":"time","x":170,"y":80,"wires":[["7e5dd7e6.f0cbc8"]]},{"id":"ae1e7d20.0b755","type":"inject","z":"cbcc618f.7bbd5","name":"","topic":"","payload":"300","payloadType":"num","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":190,"y":140,"wires":[["7926ecb4.5eec34"]]},{"id":"451eb325.0773bc","type":"ui_button","z":"cbcc618f.7bbd5","name":"","group":"c97091ce.a1898","order":10,"width":6,"height":2,"passthru":true,"label":"start","tooltip":"","color":"","bgcolor":"","icon":"","payload":"start","payloadType":"str","topic":"","x":210,"y":380,"wires":[["67a2bc37.e2cab4"]]},{"id":"391907a4.fa5f08","type":"inject","z":"cbcc618f.7bbd5","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":230,"y":320,"wires":[["451eb325.0773bc"]]},{"id":"67a2bc37.e2cab4","type":"change","z":"cbcc618f.7bbd5","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"start","tot":"flow"},{"t":"set","p":"delay","pt":"msg","to":"payload.time * 1000","tot":"jsonata"},{"t":"set","p":"payload","pt":"msg","to":"payload.km","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":370,"y":380,"wires":[["472dbc33.e52404"]]},{"id":"472dbc33.e52404","type":"trigger","z":"cbcc618f.7bbd5","op1":"","op2":"0","op1type":"pay","op2type":"num","duration":"100","extend":false,"units":"ms","reset":"","bytopic":"all","name":"","x":570,"y":380,"wires":[["a160ad04.3e19f","c88374b2.6df638"]]},{"id":"a160ad04.3e19f","type":"change","z":"cbcc618f.7bbd5","name":"","rules":[{"t":"set","p":"reset","pt":"msg","to":"true","tot":"bool"}],"action":"","property":"","from":"","to":"","reg":false,"x":770,"y":360,"wires":[["30f8adae.3aa672"]]},{"id":"30f8adae.3aa672","type":"delay","z":"cbcc618f.7bbd5","name":"","pauseType":"delayv","timeout":"5","timeoutUnits":"seconds","rate":"1","nbRateUnits":"1","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":false,"x":800,"y":420,"wires":[["c88374b2.6df638"]]},{"id":"c88374b2.6df638","type":"debug","z":"cbcc618f.7bbd5","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":910,"y":240,"wires":[]},{"id":"c97091ce.a1898","type":"ui_group","z":"","name":"Default","tab":"7f9bc135.0ec06","order":1,"disp":false,"width":18,"collapse":false},{"id":"7f9bc135.0ec06","type":"ui_tab","z":"","name":"USER","icon":"dashboard","order":4,"disabled":false,"hidden":false}]

```

---

<div class="post-metadata">

**Author:** ![E1cid](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/e1cid/32/77971_2.png) [@E1cid](https://discourse.nodered.org/u/E1cid)\
**Post date:** [3 February 2021 10:13 UTC](https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423/36 "2021-02-03T10:13:25Z")

</div>

You have edited the trigger node so it is no longer working , post 27 of this tread contains a working flow, with the correct trigger node and set up.

---

<div class="post-metadata">

**Author:** ![sanket](https://avatars.discourse-cdn.com/v4/letter/s/57b2e6/32.png) [@sanket](https://discourse.nodered.org/u/sanket)\
**Post date:** [3 February 2021 10:32 UTC](https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423/37 "2021-02-03T10:32:46Z")

</div>

![2021-02-03-160011_1920x1080_scrot](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/d/b/dbed1a5c5888364b4ea1434fb778d8b6ef1d90e9.png)

i did what you told me to do but it is still not working here is the screenshot

---

<div class="post-metadata">

**Author:** ![E1cid](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/e1cid/32/77971_2.png) [@E1cid](https://discourse.nodered.org/u/E1cid)\
**Post date:** [3 February 2021 10:49 UTC](https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423/38 "2021-02-03T10:49:10Z")

</div>

Your trigger node is missing settings, try updating your node-red as 1.06 is fairly old.

 ![Screenshot_20210203-104818](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/8/0/80779c9f08241968002406b27d0b00b380162587.png)

Or try this work around for your old version

```auto
[{"id":"e247997e.019898","type":"inject","z":"57675e72.26a0d8","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":380,"y":3600,"wires":[["8b4df1dd.402b4"]]},{"id":"8b4df1dd.402b4","type":"ui_button","z":"57675e72.26a0d8","name":"","group":"b2d54252.b73b08","order":2,"width":0,"height":0,"passthru":true,"label":"Stop","tooltip":"","color":"","bgcolor":"","icon":"","payload":"0","payloadType":"num","topic":"","x":530,"y":3600,"wires":[["a38eca46.4ddc08","c797ea0e.467bd8"]]},{"id":"a38eca46.4ddc08","type":"debug","z":"57675e72.26a0d8","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":1030,"y":3700,"wires":[]},{"id":"c797ea0e.467bd8","type":"change","z":"57675e72.26a0d8","name":"","rules":[{"t":"set","p":"reset","pt":"msg","to":"true","tot":"bool"}],"action":"","property":"","from":"","to":"","reg":false,"x":630,"y":3740,"wires":[["81300a29.84783"]]},{"id":"81300a29.84783","type":"delay","z":"57675e72.26a0d8","name":"","pauseType":"delayv","timeout":"5","timeoutUnits":"seconds","rate":"1","nbRateUnits":"1","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":false,"x":840,"y":3740,"wires":[["a38eca46.4ddc08"]]},{"id":"d6b15e37.3f5ea8","type":"switch","z":"57675e72.26a0d8","name":"","property":"payload","propertyType":"msg","rules":[{"t":"eq","v":"0","vt":"num"},{"t":"else"}],"checkall":"true","repair":false,"outputs":2,"x":800,"y":3700,"wires":[["81300a29.84783"],["c797ea0e.467bd8","a38eca46.4ddc08"]]},{"id":"110788af.a7b34f","type":"trigger","z":"57675e72.26a0d8","name":"","op1":"","op2":"0","op1type":"pay","op2type":"num","duration":"100","extend":false,"units":"ms","reset":"","bytopic":"all","topic":"topic","outputs":1,"x":630,"y":3700,"wires":[["d6b15e37.3f5ea8"]]},{"id":"20c35540.716ba2","type":"change","z":"57675e72.26a0d8","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"start","tot":"flow"},{"t":"set","p":"delay","pt":"msg","to":"payload.time * 1000","tot":"jsonata"},{"t":"set","p":"payload","pt":"msg","to":"payload.km","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":430,"y":3700,"wires":[["110788af.a7b34f"]]},{"id":"90218ecd.e20a18","type":"ui_button","z":"57675e72.26a0d8","name":"","group":"b2d54252.b73b08","order":10,"width":6,"height":2,"passthru":true,"label":"start","tooltip":"","color":"","bgcolor":"","icon":"","payload":"start","payloadType":"str","topic":"","x":270,"y":3700,"wires":[["20c35540.716ba2"]]},{"id":"596448bf.f07388","type":"inject","z":"57675e72.26a0d8","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":470,"y":3640,"wires":[["90218ecd.e20a18"]]},{"id":"b2d54252.b73b08","type":"ui_group","z":"","name":"Default","tab":"ff26331e.3d5ae","order":1,"disp":false,"width":18,"collapse":false},{"id":"ff26331e.3d5ae","type":"ui_tab","z":"","name":"USER","icon":"dashboard","order":4,"disabled":false,"hidden":false}]

```

---

<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:** [17 February 2021 10:50 UTC](https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423/39 "2021-02-17T10:50:06Z")

</div>

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.

[Previous page](https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423.md?page=1)