IoT Smart Clock Dot Matrix Use Wemos ESP8266 - ESP Matrix




Introduction: IoT Smart Clock Dot Matrix Use Wemos ESP8266 - ESP Matrix

About: I am Bluino Electronics.

Make your own IoT Smart Clock that can:

  • Display Clock with a beautiful animation icon
  • Display Reminder-1 to Reminder-5
  • Display Calendar
  • Display Muslim Prayer times
  • Display Weather information
  • Display News
  • Display Advice
  • Display Bitcoin rate
  • Display Instructables Followers & Views counter
  • Display Twitter follower counter
  • Display Facebook Page like counter
  • Display Instagram follower counter
  • Display Youtube Subscribers (realtime) & Views counter

Easy to build just need a Wemos D1 Mini and MAX7219 LED Dot Matrix Panel. No need programming skill no need Laptop/PC to program Wemos ESP8266 microcontroller, just need Android phone to upload sketch/firmware to Wemos via USB OTG.

It runs completely autonomously and be configured and controlled via an Android app, with the app you can configure and setting IoT Smart Clock (ESPMatrix) device very easy with a simple interface.

Step 1: Things Needed

Here are the things that you will need to make ESP Matrix:

  • Wemos D1 Mini - ESP8266
  • MAX7219 LED Dot Matrix Panel
  • Dupont cable - Included in LED Dot Matrix Panel
  • OTG Adapter
  • Micro USB cable
  • 3D Printed Case
  • Pieces of transparent colored Acrylic 129x32x3mm
  • Android phone (Installed ESP Matrix app)

Step 2: Modify Pin

1) Remove the LED Dot matrix component in the first column that have the soldered header pin on pcb.

2) Twisted all male pin headers 180° using long-nose pliers, so that they point inward.

Step 3: Wiring

1) Cut half of the existing dupont cable, so it becomes around 10cm.

2) Connect female header on dupont cable with male header on LED Dot matrix panel, see picture.

3) Separate the cable into two parts, 2 cables for VCC & GND, 3 cables for CLK DS & DIN. then enter into the hole on the pcb, see picture.

Step 4: Before Soldering

1) Peel the end of the cable using a wire stripper tools.

2) Then cover all ends of the cable with tin.

Step 5: Soldering

1) Solder to connect CLK to D5, CS to D6 & DIN to D7.

2) Solder to connect VCC to 5V & GND to G.

Step 6: Putting It All Together

You can use double sided tape, to glue between the Wemos and the LED Dot matrix panel, see the picture. Also reinstall the LED Dot matrix component which is in first step removed

Step 7: Placing to the 3D Printed Case

This 3d printed case is design more slim and pressing to make it look solid and robust, so to install it is not so easy need a little pressed.

ESP matrix can be made in two sizes, a short 32x8 pixel of LED use 1 panel LED Dot matrix and a long 64x8 pixels of LED use 2 panel LED dot matrix, so to make a 3D printed case depends on your choice.

- STL file for a short 32x8

- STL file for a long 64x8

Step 8: Add Acrylic

To make the light of the LEDs be more clear and diffused, on the LED surface add black transparent colored acrylic.

There are two sizes of acrylic:

- A short: 129x32x3mm.

- A long: 257x32x3mm

Step 9: Programming

1) To program the Wemos ESP8266 (ESP Matrix) very simple, you only need to connect Wemos (ESP Matrix) to an Android phone via a micro usb cable and OTG adapter, see picture.

2) Then install the ESP Matrix app from Google Playstore.

3) In the first welcome screen tap UPLOAD button.

Step 10: App Interface for Configuration

After programming is complete then it is necessary to set some parameters of the devices:

1) Connect ESP Matrix device to network internet using app.

2) You need Sign-up to get an API key from, then copy the your API key to the weather option in app.

3) You need City ID from, eg.2643743 for London, then copy the your City ID to the weather option in app.

Step 11: Make a Long Type 64x8

If you feel dissatisfied with the short type because you can only see short messages, so you can make the long type the length of the size two times longer. For more details you can follow the tutorial in this video.

Step 12: Enjoy

Hopefully you enjoy your ESP Matrix. If you do, please share your makes, share the link, like and subscribe. As always, if you have any questions please let me know!

10 People Made This Project!


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Question 23 days ago

When uploading from the app esp matrix, an error at 3~4%
How can I slove the error?


6 weeks ago

My Smart Clock is restarting constantly.(every ~45seconds )
I don't know what the problem is. I have already used two distinct power supplies.
The instagram counter doesn't works.
Add twitch counter
Add Multilingual-Date
Add other Crypto currencies


2 months ago

requests go to api, but data on device screen is not present, what should I do?


2 months ago

At the moment, it does not show the number of YouTube subscribers, api, id entered correctly. When is the firmware update?


2 years ago

Mmmm, very cool, like a DIY simple LaMetric. Looks great, but went all the way down the post waiting to see how you coded the ESP8266, how the OTG worked, the code for driving the display etc? Nothing?


Reply 2 years ago

what do you mean by this, am about to order parts for the project and want to make sure it is duable


Reply 2 years ago

This is a "closed" project, there's no code available and you would have to use their Mobile App to install and configure. Like @MikeL90 said below - this is probably using open source software and frameworks, but they are not releasing the code. You will be able to make it and use it, but it's not very in keeping with open source and the maker community...


Question 8 months ago

Bonjour ,

Pourquoi je n'arrive pas a me connecté au montage en wifi ?(non détecté) merci de votre réponse et éventuellement d'une solution )

Hello ,
In addition to this, you need to know more about it.
Why can't I connect to the wifi assembly? (Not detected) thank you for your answer and possibly a solution)


Answer 8 months ago

Yes it can work . U can upload this program on esp8266 based module


Reply 8 months ago

With nodemcu??? I'm trying but I can't thanks


Question 8 months ago

Hello, is it possible to use nodemcu instead of wemos?


9 months ago

there are a lot of problems with the app, i can't flash the firmware and doesn't show any image and can't conect, few days ago i could do all


9 months ago

Hello i got problem with led block.. when i disconnect and connect one more time random block stop lighting.. any sugestion how to fix it? When i change block with connect DC they lighting ok but when i disconnect and connect one more time random block stop lighting.


10 months ago

I have probelm with updating firmware via OTA. , the message is permission denied. What should I do ?


1 year ago

Molto buono.ottimo progetto bravi. Grazie mille.sarei felice se postate il codice.ino


Question 1 year ago on Step 1

Can't set the time with google in sad