Hi everyone, I am a very beginner, don't be disgusted abut my question. I am trying to count how many times a button is pressed. I have setup a Rpi-gpio node on a pin and connected it to a function. [{"id":"c74669a0.6a34f8","type":"tab","label":"Flow 2","disabled":false,"info":""},{"id":"56056d7…

The error was mycount == 1; instead of mycount = 1; :slight_smile:

Please see Context - it covers a count example. https://nodered.org/docs/user-guide/writing-functions#storing-data

Can you format your pasted your export following these guidelines ? [image] How to share code or flow json FAQs To share code samples or flow json in this forum, you need to take care to format it properly so that it is displayed correctly. The easiest way to do that is …

I hope is correct now. Thanks for the input.

Thanks for pointing me to nodered resources. However I am not coming right. There is something I do not understand with the output of the Rpi-Gpio node. I have added a change function to it with the aim of getting out a timestamp and manage from there. The issue is that the change function doesn't…

Hi Felice, I have not tested your code, but at first sight I think it goes like this: Gpio=0 so count=0+1=1 Gpio=1 so count=1+1=2 Gpio=0 so count=0+1=1 Gpio=1 so count=1+1=2 ... You need to store the counter in context memory. See the "storing data" section here . Bart

Btw don't hesitate to ask if you are stuck! But it can never harm to think about it yourself first :wink:

Hi Bart, Thanks. I am trying to put some effort on my side. However, before I start counting I need to solve the challenge explained in my answer to meeki007 just above your post. If I don't get that right the messaage coming from Gpio goes all the way trough. I don't know why. Thanks

attach a debug node (set to display the complete msg object) to the output of the rpi-gpio-in node and copy the debug output [Screen Shot 2021-05-16 at 7.23.04 AM] and paste the results in a reply

[image] FeliceM: var count = msg.payload; count++ if (count >4) { count==1 } msg.payload=count return msg; Hello @FeliceM , I agree that it would help to have a debug output from your GPIO. Nevertheless concerning your example to count I would like to give you an example, which should take in…

Hi, this is the debug message I get injecting from Inject {"_msgid":"df81cc0a.ac9e9","payload":1621170410439,"topic":""} and these are the debug outputs I get from Rpi-Gpio-gpio when pressing the button: 5/16/2021, 3:09:19 PMnode: d7338736.b648c8 pi/22 : msg.payload : number 2 5/16/2021, 3:09…

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Count how many times button is pressed

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meeki007 16 May 2021 06:37 3

Can you format your pasted your export following these guidelines ?

Topic		Replies	Views
"Rpi-gpio in" node sending two messages General	4	235	17 May 2021
Weird behavior using buttons General	16	265	22 November 2022
Some Help about my flow General	31	1205	22 April 2022
"Buttons", multi-press detection and problems with flow General	13	2004	15 March 2020
Does any GPIO node support edge events, rising or falling state changes? General	26	1448	8 April 2021

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Count how many times button is pressed

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