Homeydurino and servo

Questions & Help
#1

Hey Guys!
I have succeded to blink an led with the flow card. but when i connect the servo PWM to where i have the led connected the servo does not move.

the servo is connected to 5+ and - and here i have a ground from the esp card allsow

any idea how to get the servo to work?

#2

Maybe you can share some flows so other people can have a look at It and maybe can help you.
And maybe some pictures of youre build.

#3

The problem is the code not the flow . it works to light a led but not to move a servo

#4

You need to include and use a library for the servo, it generates a PWM signal (pulse width modulated) for the third wire of the servo. Have a look at Randomnerdtutorials.com for example scetches.
ESP32 Servo Motor Web Server with Arduino IDE | Random Nerd Tutorials

#5

Can your power supply provide enough power for the servo? Also, since you’re using an ESP board, can your servo handle 3.3V I/O?

#6

Yes it worked fine with an arduino uno but i have now seperet + - to the servo

#7

Yes but i can´t seam to figure auto how to involve this in to homeys code

#8

An Arduino Uno has a very different MCU and has 5V I/O, whereas the ESP’s have 3.3V I/O, hence the question if your servo accepts a 3.3V PWM signal.

I would suggest getting the servo-part working first (standalone), then the Homeyduino part.

#9

Don’t understand what is the problem, is it the connections, or is it the code,
as Robert says, first make the conections and drive-code to the servo working and then the Homey-duino code.
Also you did not tell what ESP you are using.
If your code is not working, show your code.

#10

@robertklep Yes i will try that. But do you think i need to drive it trough esp cardet?

@JPe4619 The card i use is Lilygo® Ttgo T-display. i will do as suggestet and try standalone code on de card too se if it moves the servo

edit: Standalone code is moving the servo.

Then i need help to get it moving when flow is active

#11

You can start with the description from Athom, at:

And view this YouTube presentation:

then combine both into your sketch using:

 Homey.begin(hostName);
  Homey.setClass("windowcoverings");
  Homey.addCapability("windowcoverings_set", doServo); //"type": "range", "min": 0, "max": 1, "step": 0.01

  myServo.attach(8, 550, 2500); // 544-2400=def.?.. Attaches the servo on pin to the servo object

Also a very good instructor is RNT: ESP32 Servo Motor Web Server with Arduino IDE | Random Nerd Tutorials

#12

thanks for good replays! :slight_smile: I am new to the coding scene and i thought it would be easyer. like i got a code working with digitalwrite and to turn on a led and thats with homeyduino code. and tought that it would work with the servo. like easy on off on the servo

#13

Well, if you do understand all what you did with a LED and Homeyduino, this is just the next step, just cut and paste :+1:

#14

Yee that i understand. but i can´t understand where to put it in the homeyduino code. i understand the arduino setup and loop but not where in homeyduino code.

#15

You can P.M. me the source that you already have, we can try to find out what you need.