it loads the SAME fileUrl over and over and over and over
it adds a fake timestamp to the URL to force the browser cache to see a different file
which loads a new instance into the cache…

so somehow you have to do

cp  whatever_source_path/new_logo_to_display.jpg  ~/MagcMirror/modules/MMM-SimpleLogo/public/Amc.JPG

I have tested this and it works

also I think
the content of the new logo image TYPE must match the file extension… it is expecting jpg
so cannot change to gif/png for next ones to load

Open the developers window ctrl-shift-i select the console tab and scroll up to see any messages sent from the on screen module

                                        },
                                notify2: {
                                        title: "Support",
                                        notification: "SIMPLE_LOGO_UPDATE",
                                        payload: {
                                                fileUrl: "modules/MMM-SimpleLogo/public/RedSupport.jpg",
                                                width: "150px"
                                                }
                                        },

I added this to the config.js file

            {
            module: "MMM-OnScreenMenu",
                    position: "bottom_right",
                    config: {
                            menuItems: {
                            notify1: {
                                    title: "Patch",
                                    notification: "SIMPLE_LOGO_UPDATE",
                                    payload: {
                                            fileUrl: "modules/MMM-SimpleLogo/public/Amc.JPG",
                                            width: "200px"
                                            }

I didn’t look at that code

Module: MMM-SimpleLogo

The MMM-SimpleLogo module is third party modules of the MagicMirror. This module simply displays logo.

Using the module

To use this module, add it to the modules array in the config/config.js file:

modules: [
    {
        module: 'MMM-SimpleLogo',
        position: 'top_left',    // This can be any of the regions.
        config: {
            // The config property is optional.
            // See 'Configuration options' for more information.
        }
    }
]

Configuration options

The following properties can be configured:

Notification Events

The MMM-SimpleLogo module supports the notification event SIMPLE_LOGO_UPDATE which allows the configuration to be dynamically modified. As an example, the MMM-OnScreenMenu module might be used to dynamic adjust the fileURL parameter as follows:

{
    module: "MMM-OnScreenMenu",
    position: "top_left",
    config: {
        menuItems: {
            notify1: {
                title: "Show Cat",
                notification: "SIMPLE_LOGO_UPDATE",
                payload: {
                    fileUrl: "cat.jpg",
                    width: "750px"
                }
            },
            notify2: {
                title: "Show Dog",
                notification: "SIMPLE_LOGO_UPDATE",
                payload: {
                    fileUrl: "dog.jpg",
                    width: "1050px"
                }
            }
        }
    }
}

Refresh/refetch image file between interval. Only use this if your image url return different image after some interval of time, even the fileUrl is not changed.

the code adds a time to the end of the fileurl to force a unique value. You could do this if the URl to the file stayed the same, but the actual file was different (something overwrote the file since last time)

so, they planned on the something changing the actual logo file contents

        var imgsrc = self.config.fileUrl;
            this.interval = setInterval(function() {   // < --- start a recurring timer
                img = document.querySelector(".simple-logo__container img[src*='" + imgsrc + "']");
                imgsrc = self.config.fileUrl;
                if(!imgsrc.includes("?"))
                        imgsrc += '?' + Date.now();  // < ---
                else
                        imgsrc += '&' + Date.now();  // < -----
                img.setAttribute('src', imgsrc);
            }, this.config.refreshInterval);  // < ---  refresh time
        }

the code also allows some other module to send it a message to change the logo url

I don’t understand why people have to be so confrontational and un helpful.

we are not being ‘un helpful’, the design of the mirror app is to INTENTIONALLY keep people from having to change the module file for different options…

so, when we see someone going down that path, we want to get them back on the design
I can look at the module code from github, I can’t see what you did locally. (in general)
makes it harder to help, and changes made get wiped out if there is a module update…
(that tends to make people upset when their stuff is lost!)

but your and my initial understanding of what was supposed to happen (as I didn’t know anything about this module), is wrong… update the cycle time but keep the same exact image and nothing will change.
you can prove this with 2 logo files.

start with one, and then copy the other over the 1st while the module is working.

we are all volunteers here…

As far as what I mean by auto changing logo, that is what I understood by the documentation for the module.
Dynamic to me means it will change at a given amount of time…

****** Copy/Paste from MMM-SimpleLogo*****
The MMM-SimpleLogo module supports the notification event SIMPLE_LOGO_UPDATE which allows the configuration to be dynamically modified. As an example, the MMM-OnScreenMenu module might be used to dynamic adjust the fileURL parameter as follows

To ensure that the SimpleLogo module has not been damaged I would reinstall the module and the OnScreenMenu module if you edited the JavaScript of that too.

Once you have a fresh install of SimpleLogo and OnScreenMenu you need to edit the config file in magic mirror and not any of the module files.

I’m not sure what you mean about the “auto chance” aspect. If you want the logos to automatically change then I would suggest sending a notification to SimpleLogo using ModuleScheduler. On the other hand, if you want to manually change them. You can use the OnScreenMenu module like so:

{
    module: "MMM-OnScreenMenu",
    position: "top_centre",
    config: {
        menuItems: {
            notify1: {
                title: "AMC Logo",
                notification: "SIMPLE_LOGO_UPDATE",
                payload: {
                    fileUrl: "modules/MMM-SimpleLogo/public/Amc.JPG",
                    width: "750px"
                }
            },
            notify2: {
                title: "Show other logo",
                notification: "SIMPLE_LOGO_UPDATE",
                payload: {
                    fileUrl: "modules/MMM-SimpleLogo/public/......",
                    width: "1050px"
                }
            }
        }
    }
}

which should hopefully give you the option to change the logo manually.

Hope this helps.

you edit the config.js

default is NEVER update

in config.js

 {
   module: "MMM-SimpleLogo",
   position: ????,
   config: {
      refreshInterval:  5* 60 * 1000   // 5 minutes, times  60 seconds times 1000 milliseconds per second
      fileUrl: "???????"
   } 
}

everything in the config: { … }
overrides the moduleName.js defaults: { …} items of the same names

can u post that part of your config.js for this module?

the doc says

refreshInterval	

Refresh/refetch image file between interval. Only use this if your image url return different image after some interval of time, even the fileUrl is not changed. See this case #2, awesome project by @ElYoM

Possible values: 1000, 2000, or 10000
Default value: 0 (disabled)