How do you get modules to communicate with each other?

[adrien00]

I’ve seen that it can be done using notifications however i dont really understand how to do so, do you have to write a script of some sort?

The kind of thing im looking to do is have multiple pages using MMM-Pages and for example have a voice recignition module to change page.

I just need the basic idea however as currently i have no idea how to do so.

[sdetweil]

@adrien00 your voice reco module uses a JavaScript function

this.sendNotification(notification_string,  optional_data)

in this case u need to send a notification that the MMM-Pages module understands.

the module documents the notifications it understands

[adrien00]

@sdetweil sorry my laptop stopped working so only just seen this! Where am i writing these commands? In config.js? Do i need to put some sort of if condition in? Also do you know of any exaple codes that show how to do this?

Thanks

[sdetweil]

@adrien00 the source code of the voice module would need to do this.

many modules use this . my MMM-SleepWake does this to tell other modules that we are blanking the screen or waking it up

https://github.com/sdetweil/MMM-SleepWake

all the default modules send notifications to tell others about the weather, the calendar, alerts, news…

other modules can use the info or ignore it.

sendNotification is a broadcast to all other running modules

[adrien00]

@sdetweil This is so helpful, thanks!

[sdetweil]

@adrien00 from the specs
https://docs.magicmirror.builders/development/notifications.html

[cowboysdude]

@adrien00 I have two modules that relay info back and forth to each other. They are weather modules and I get info and send it over to the other module.

I do this because I needed/wanted some weather info to show up in a specific place so I send my ‘payload’ from the 1st module to the 2nd module…