Hello, Im working on a IoT project where i want to control 8 leds and 4 button states from my Nucleo. The goal is to see each button state seperately on my phone. For this i have a MQTT topic for each button. The problem i have is the following. I recieve all 4 button states in seperated msg.payloa…

[image] anthony_dob: The problem i have is, i want to see each button state of my nucleo (pressed/not pressed) on my phone app aswell. For this i need to send each button state to a seperated MQTT topic. As you could see on the picture i manage to send all 4 button states to node-red as a string…

So, only to help me get a handle on what is where: Where are the buttons? How are you indicating the state of the buttons on the phone's display? That requires a dashboard of some kind. Ok, you said: [image] anthony_dob: I do this with the app "Linear MQTT Dashboard". But I don't know e…

sorry for the bad explaining.. So i have my nucleo programmed to send the button states every 10 seconds. Not real time only the button states that moment every 10 seconds. It sends this to node-red trough USB. In node-red i pick the state of the buttons up with the COM node wich my nucleo is connec…

All leds and buttons are on a extension shield connected on my nucleo. ill show you the code i put in my nucleo. That way you might understand what i am trying to do. //UART_Recv_SendINT #include "mbed.h" Ticker sendStatusUB1; Ticker sendStatusUB2; Ticker sendStatusUB3; Ticker sendStatusUB4; Seri…

Look at the Switch node. In there you can tell it to see if msg.payload Contains "button 1" and send it to output 1, if it contains "button 2" then send it to output 2 and so on. That will split it into four separate paths so you can then decide what you want to do with each one.

[image] anthony_dob: sorry for the bad explaining.. Don't worry. I failed English. Ok, we are moving in the right direction. That last post is great! It means you can edit what is sent. The messages though don't look quite right. I can only see the code for the first button. But I'll…

Yeah, silly me. I forgot about the contains option. Good on you Colin. Silly me.

This is what @Colin was meaning: [{"id":"b9924a74.4d98f8","type":"tab","label":"Flow 1","disabled":false,"info":""},{"id":"37cfbf3a.73feb","type":"inject","z":"b9924a74.4d98f8","name":"","topic":"","payload":"open","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":690,"y…

i haven't worked with switch node before but is this how you do it? It's currently not working [2020-06-15 14_36_14-Node-RED] [2020-06-15 14_36_23-Node-RED]

Nearly. I posted an example. You need to change the == to contains. Then it will work. And! Just make it button x where x is either 1, 2, 3 or 4 So it will look like: [Screenshot from 2020-06-15 22-47-49] Here is an example of the two methods I said: [{"id":"8dd4a8b0.631a68","type":"switch"…

How to select one msg.payload out of 4 recieved

General

anthony_dob 15 June 2020 13:02 17

oh yes i see. Second one you added a topic. Makes it more readable i guess. Again thank you for the help! I have been strugling many hours to write a function wich would do this.

Topic		Replies	Views
One button with 2 MQTT topics Dashboard	17	849	4 February 2021
Change node propery from directly from "function" General	20	853	22 August 2021
Change the Output between 0 and 1 on each message that I receive in the input General	19	3991	20 September 2021
MQTT is driving me crazy with inconsistent doings General	78	2503	27 September 2020
Extract two values from mqtt message(json type) and create a new mqtt with these two General	38	5043	19 March 2020

How to select one msg.payload out of 4 recieved

Related topics