(De)activate Telegram-notifications with Dashboard UI-switch

General
1

Hi,

what I am trying to do:
I want to have a UI-Switch for activating or deactivating the sending of messages via Telegram.

Scenario:
Switch is deactivated: Someone turns the light on or off = I dont receive a message
Switch is activated: Someone turns the light on or off = I recieve a message via Telefgram with the message "Light is on" or "Light is off"

What I have done / what I have

  • TelegramBot Bothfather
  • Dashboard UI switch
  • Philips Hue Light node

Debug:
Philips Hue Light
On

msg.payload : Object
object
on: true
brightness: 100
brightnessLevel: 254
reachable: true
updated: "2021-03-19T08:59:04+00:00"

Off

msg.payload : Object
object
on: false
brightness: 100
brightnessLevel: 254
reachable: true
updated: "2021-03-19T08:59:54+00:00"

Function-Node


if (msg.payload.on == true && msg.payload == on) {
msg.payload.chatId = private
msg.payload.type = "message"
msg.payload.content = "Light is on";
}
else if (msg.payload.on == false && msg.payload == on) {
msg.payload.chatId = private
msg.payload.type = "message"
msg.payload.content = "Light is off";
}
return msg;

Debug of the function-Node
If I set UI-Switch to "on"

function : (error)
"ReferenceError: on is not defined (line 2, col 46)"

and "off"

function : (error)
"ReferenceError: on is not defined (line 7, col 52)"
2

change
if (msg.payload.on == true && msg.payload == on) {

to
if (msg.payload.on == true) {

change
else if (msg.payload.on == false && msg.payload == on) {

to
else if (msg.payload.on == false) {

Reason...

  1. on is not a variable you have defined. you probably meant to test msg.payload oject contains a property "on" (but the first part of your if takes care of that any how)
1 Like
3

Hey Steve-Mcl,
thanks for your fast response.

Now, the UI-Switch for activatic/deactivate messages in Telegram has no function.
If the switch for sending messages is off I still receive the message whether the light is turned on or off.

4

I only addressed your errors.

The code and info you posted showed nothing "obvious" related to UI elements. You didnt even post a screenshot of your flow.

I do now suspect now the "on" part of your original if statements was meant to be along the lines of "if the UI switch is on" send a message? Unfortunately, due to lack of flow there is not really enough info to help.

As a suggestion - store the value of the UI switch in flow or global context, then in your function, grab that status from flow or global context

e.g...

var allowTelegram = flow.get("allowTelegram") || false;
if (allowTelegram == false) {
  return null; //dont send message to next node
}
  
if (msg.payload.on == true) {
  msg.payload.chatId = private
  msg.payload.type = "message"
  msg.payload.content = "Light is on";
} else {
  msg.payload.chatId = private
  msg.payload.type = "message"
  msg.payload.content = "Light is off";
}
return msg; //return msg to next node (telegram)
5

If you are trying to block the flow of a message under the control of a ui switch then an alternative is to use node-red-contrib-simple-gate. You can easily use the switch position to open and close the gate to allow the telegram messages through or to block them.

1 Like
6

Sorry my fault. I should have taken screenshots and described my flow to you in more detail.
Anyway, thanks for your help!

7

No bother. Did you get it working? Perhaps for future readers with the same request, you could share your solution?

8

Yep, its working.
I have implemented it with the solution of @Colin
Very simple, perfect for dummies like me.

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9

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