MMM-Navigate, Navigation inside MagicMirror with Rotary Encoder

[Eisblume]

@AxLed
Do not think that I am lying ;-), but it works fine, when I start MagicMirror and after that I start the python - script from here https://github.com/martinohanlon/KY040.

cw, cww and press works absolutely fine.

It is very strange.

[Eisblume]

@AxLed
Ok, i fix it now for me.

I know, it is a dirty code, but don’t found another solution :dizzy_face:

I attached the KY040 python script in the node_helper.js. Then everything works fine.

//node_helper.js
/* Magic Mirror
 * Node Helper: {MMM-Navigate}
 *
 * By {AxLED}
 * {MIT} Licensed.
 */

 //Debugging
 //tail -f ~/.pm2/logs/mm-out-0.log
 //tail -f ~/.pm2/logs/mm-error-0.log 

const Gpio = require('onoff').Gpio;
...
const spawn = require("child_process").spawn;
//Variables
...
  start: function() {
		var self = this;
		this.loaded = false;
		var process = spawn("python", ["/home/pi/Downloads/KY040/examples/python3.py"]);
	},
	
...
});

[AxLed]

@Eisblume
No Problem, i am glad it works for you now, so you also did your first coding experiance.

AxLED

[Eisblume]

@AxLed
Yes very interesting experiences :-) !

Could you explain my how to start “Tagesschau in 100 Sekunden” in MMM-Navigate ??

[AxLed]

@Eisblume
You need two things:

• first: a modules which is able to stream 100Sec Tagesschau, i made a fork see MMM-Podcast2
• second: the right config (i posting only the relevant part)

....
{
			module: 'MMM-Podcast2',
			config: {
				// See 'Configuration options' for more information.
				omxargs: ' --win 0,0,1920,1080  -o both '
			}
		},
{
			module: "MMM-Navigate",
			header: "Navigation",
			position: "top_right",
			config: {
					Alias: [
						'Tagesschau 100 Sekunden',
						'Herunterfahren'
					],
					Action: [
						{notification:'BUTTON_PRESSED',payload:''},
						{notification: "REMOTE_ACTION", payload: {action: "SHUTDOWN"}}
					],
					GPIOPins: [26,20,19]//rotary cw, rotary ccw, rotary press (BCM Numbering)
					},
		},
...

AxLED

[Eisblume]

@AxLed said in MMM-Navigate, Navigation inside MagicMirror with Rotary Encoder:

{notification:‘BUTTON_PRESSED’,payload:‘’},

Thanks. Works perfect !!!

[keineAhnung123]

Hello @AxLed ,

Two things:

First

I have the same issue like @Eisblume :

The click doesnt work.
When i then start a sample code to test the rotary encoder (from like here), the click works in the sample code.
If i start the Magic Mirror after that again, then the click works there too.

Maybe there is a missing initialization of the rotary encoder in your code?

Second

Is there a possibility to get more config possibilities?
Like starting the module hidden or shortening the time of the hiding process?

Thanks in advance :)

[AxLed]

@keineAhnung123,

to your first issue:

• is only click not working or is rotation also not working?
  Because rotation and click (Button press) uses the same library (onOff).
• on which pin is click connected, as the pi GPIO Pins have different features?
• what versions you are using (pi, OS, MM-Version)?

To your second issue.

• MMM-Navigate uses the MM notification system, so you can do almost everything you want. What are you trying to to, maybe i can give you a sample for your config.js
• for shortening time of hidding see MM Docs -> search for hide, there is a parameter for speed.

Regards

AxLED

[keineAhnung123]

Hello @AxLed , thanks for your reply

first

• rotation works fine but the button press does not
• i use your standard configuration so it seems to be BCM 19
• PI 3 B+, stretch, MM 2.14.0

I tried MMM-Buttons too. Same problem there. I first have to run a sample script with python and after that the button works in MM too. It uses the onoff library too.

I found a strange behaviour:
I start MM -> button click doesnt work
I start python test script and after that MM -> button click works
When i restart the Raspberry PI and start MM (without the python test script) -> button click works
When i shutdown the Raspberry PI and cut off the connection to an electricity source and restart the PI after that -> button click doesnt work

Thats strange isnt it?

second

I changed the hiding time from 10000 to 2000 cause i prefer a shorter time.
Is there a way to start the module hidden?
I tried following:

    // Define start sequence.

    start: function() {

        Log.info("Starting module: " + this.name);

        this.sendConfig();//pass config to node_helper.js

        this.hide();

    },

and this

    //Helper, to use module without Rotary Encoder and without GPIO Pins, like developing in Pixel VM

    notificationReceived: function(notification, payload) {

        if(notification === "CW" || notification === "CCW" || notification === "PRESSED"){

            this.naviaction({inputtype: ""+ notification +""});

        }

        if(notification === "SHELLCOMMAND"){

             this.sendSocketNotification(notification, payload);

        } 

        if(notification === "MODULE_DOM_CREATED"){

             this.hide();

        }

    },

but both didnt take effect :(

third

I found an reproducable error:
When i start MM and first rotate counterclockwise there is an error in the MM console:

[09.01.2021 09:11.07.337] [LOG]   MMM-Navigate, listen on GPIO PINs (BCM): 26,20,19

[09.01.2021 09:11.18.306] [ERROR] Whoops! There was an uncaught exception...
[09.01.2021 09:11.18.321] [ERROR] ReferenceError: lastdir is not defined
    at tick (/home/pi/MagicMirror/modules/MMM-Navigate/node_helper.js:92:39)
    at /home/pi/MagicMirror/modules/MMM-Navigate/node_helper.js:66:4
    at /home/pi/MagicMirror/modules/MMM-Navigate/node_modules/onoff/onoff.js:135:9
    at Array.forEach (<anonymous>)
    at pollerEventHandler (/home/pi/MagicMirror/modules/MMM-Navigate/node_modules/onoff/onoff.js:134:32)

It doesnt effect the functionality but just wanted to mention it… ;)

[AxLed]

@keineAhnung123,

thanks for feedback.
first:
Idea A:

• maybe the pin 19 is the problem, because it is not only a GPIO pin rather it has SPI features. Can you change to BCM16 (and change it in config.js as well) and try it?

Idea B:

• Do you use capacitors for debouncing? If not, you can change debouncing value of following line: https://github.com/Ax-LED/MMM-Navigate/blob/master/node_helper.js#L37

second:

• Which module should start hidden? MMM-Navigate?

third:
I tried to reproduce on my pi 3 and get no error, so i checked the code.
You can add following line as new line 19 in node_helper.js
var lastdir = '';

AxLED