MMM-GooglePhotos

[teitlebot]

@Sean
Any idea how I can get the monitor to rotate like this guy did except I want to use google photos? He created the code for arduino to rotate but the pi has to send a signal based on rotation of the photo.
https://hackaday.io/project/16291-flipframe

[sdetweil]

@teitlebot you would have to do the same for google photos download… he could have worked out the horizontal vs vertical alignment of the picture…

google search for the stepper motor , A4988 Stepper

[sdetweil]

@BryceTalbot I solved that problem a while back…

need to use an onload() handler to process after the image is loaded but before shown.

the key is to minimize the total change to the dom, to reduce screen flash and dead space showing thru

so I load the images hidden and when loaded, calculate the size to make it fit on the screen without any stretch or clip. contain and cover styles both alter the image display.

then in the module dom contribution i append the image… (there might already be one being displayed)
and mark the image to be shown, with fade in
then I check if there are two, and if so, hide the 1st (with fade out) and then delete it from the dom contribution, leaving one image.

m here is a variable holding the size of the top margin
var m = window.getComputedStyle(document.body,null).getPropertyValue(‘margin-top’);

      // set the onload event handler
      // the loadurl request will happen when the html is returned to MM and inserted into the dom. 
      img.onload= function (evt) {

        // get the image of the event
        var img = evt.currentTarget;
        //Log.log("image loaded="+img.src+" size="+img.width+":"+img.height);

        // what's the size of this image and it's parent
        var w = img.width;
        var h = img.height;
        var tw = document.body.clientWidth+(parseInt(this.m)*2);
        var th = document.body.clientHeight+(parseInt(this.m)*2);

        // compute the new size and offsets
        var result = this.self.ScaleImage(w, h, tw, th, true);

        // adjust the image size
        img.width = result.width;
        img.height = result.height;

        //Log.log("image setting size to "+result.width+":"+result.height);
        //Log.log("image setting top to "+result.targetleft+":"+result.targettop);

        // adjust the image position
        img.style.left = result.targetleft+"px";
        img.style.top = result.targettop+"px";
        img.style.opacity =	this.self.config.opacity;
        img.style.transition = "opacity 1.25s";

        // if another image was already displayed
        if( this.self.wrapper.firstChild!=this.self.wrapper.lastChild)
        {
          // hide it
          this.self.wrapper.firstChild.style.opacity=0;
          // remove the image element from the div
          this.self.wrapper.removeChild(this.self.wrapper.firstChild);
        }

      }.bind({self: this, m:m});

I use this same methodology in a photo based calendar display module. it loads photos from google_drive, dropbox, and local file systems. But you cannot tell how big the image is (or its orientation) until AFTER it loaded.

[teitlebot]

@sdetweil I have the arduino and stepper motor all working and I see he has the orientation labeled in his javascript code but I have no idea how to get the mmm google photos JS to send a command to the arduino motor. Im not a real coder I can just play with other peoples code a bit.

[sdetweil]

@teitlebot yeh, no idea either myself.
Maybe a web service on the Arduino callable from mm module

https://www.survivingwithandroid.com/2016/05/arduino-rest-api-iot.html/amp

another example, thinner, more local, esp8266 wifi…

https://mancusoa74.blogspot.com/2018/02/simple-http-rest-server-on-esp8266.html
using this second set of info, I was able to add a web server to my arduino ESP8266 sketch in 10 minutes…

[A Former User]

@teitlebot
Interesting Job. I can add notifications for current photo direction.
The only problem is, If frame would be rotated, other MM modules are not rotated automatically.

[teitlebot]

@Sean I dont care about the other modules as I would have them off during rotation. Can notifications be sent out of MM to an arduino?

[teitlebot]

@sdetweil He just connects the arduino to the pi serial port. Or I can maybe use ifttt. thanks for the links though.

[teitlebot]

@Sean I think I can access IFTTT or Webhooks from my arduino. Is it possible to send out notifications that way?

[A Former User]

@teitlebot yes but… image itself will not be rotated by frames direction. It should be rotated again by direction. Think about it. It is totally different work.