[2024-04-21] Version 1.4.2 released! Check the change log to see the fixes and new features added. Be part of the Clock Club and create your own clockface using Canvas.

The DIY smart wall clock device

Clockwise was an idea I had while working with 64x64 LED matrices. These displays are about the size of a wall clock and with the ESP32, besides controlling the content presented on the display we also gain the functionality of WiFi, Bluetooth, touch buttons and other sensors, which gives us basically a smart wall clock. From there I started to develop a platform to create the Clockfaces, or skins that the clock can have. The possibilities are many and I hope that with help from contributors, we can grow the options even more.

⏰ New Clockfaces

Create a new custom Clockface starting from here or take a look at the Clock Club and discover how to create new ones using just a JSON file with no coding.

Available clockfaces

Mario Bros. Clock	Time in Words
https://github.com/jnthas/cw-cf-0x01	https://github.com/jnthas/cw-cf-0x02

World Map Clock	Castlevania Clock Tower
https://github.com/jnthas/cw-cf-0x03	https://github.com/jnthas/cw-cf-0x04

Pacman	Pokedex
https://github.com/jnthas/cw-cf-0x05	https://github.com/jnthas/cw-cf-0x06

Canvas	Description
	Canvas is a special type of Clockface that is capable of rendering different themes described in a JSON file. Find out more here.
https://github.com/jnthas/cw-cf-0x07

Driving the led matrix

The three main hardware components of Clockwise are:

• HUB75/HUB75E compatible LED matrix 64x64
• an ESP32; and
• a power supply of 3A or more

With these components in hand, just follow the wiring instructions according to the library used, by default Clockwise uses the ESP32-HUB75-MatrixPanel-I2S-DMA but any Adafruit GFX compatible library should work. The default wiring connection is showed below.

Full size

• In case you want something ready to use, I recommend Brian Lough's ESP32 Trinity, basically it's connecting the board and uploading the firmware, as simple as that.
• If you want a designed PCB, I recommend this project from @Alexvanheu. It's compatible with HUB75/HUB75E led matrices and already tested with Clockwise https://github.com/Alexvanheu/Mario-Clock-PCB-ESP32
• ESP32 D1 Mini D1 RGB Matrix Shield from @hallard is another option

How to change the clockface (web flashing)

1) Go to https://clockwise.page/ and select the desired clockface 2) Connect the ESP32 device on your computer's USB port 3) Click on the Flash button 4) A dialog will appear, select the correct USB port and click in Connect (screenshot) 5) Select the INSTALL and INSTALL again (screenshot) 6) Wait while the flash tool uploads the firmware and finish (screenshot) 7) From the version 1.1.0, click in NEXT on step 6, Improv will start looking for available WiFi networks to connect 8) Select your local network (must be a 2.4GHz) and enter with your password (screenshot) 9) If connection was successful, a message with button VISIT DEVICE will pop up and you can visit the Clockwise setting page (screenshot)

Configuring only WiFi

After flashing your clockface, you will have a step to configure the WiFi. But in case you change your access point or password, you can set up just the WiFi connecting the Clockwise on USB, opening https://clockwise.page and clicking in Flash button, a window will pop up with a few options where you can re-configure your WiFi network (screenshot) as well as open the Settings page to change preferences using button VISIT DEVICE. Remember: it is important to use a 2.4GHz WiFi, it will not work on 5GHz.

Settings page

The settings page have the following options

• Timezone: The timezone must be in the format America/New_York, America/Sao_Paulo, Europe/Paris, Asia/Dubai, etc. so that the clock can connect to an NTP server to get the correct time.
• NTP Server: By default the clock will sync with pool.ntp.org, but you can configure your own (local) NTP server to be used.
• Swap Blue/Green pins: Some displays have the RGB order different, in this case RBG. You can use this options to change the order.
• Display Bright: Change the display bright.
• Use 24h format: You can choose between 20:00 or 8:00PM in your device.
• Automatic Bright: Once you connect a LDR in the ESP32, Clockwise will be able to control the display bright based on the ambient light. Check the Wiki about that.
• NTP Server: Configure your prefered NTP Server. You can use one of the NTP Pool Project pools or a local one. Default is time.google.com.
• LDR Pin: The ESP32 GPIO pin where the LDR is connected to. The default is 35. There is a link there where you can read the current value of LDR and test if it's working.
• Posix Timezone String: To avoid remote lookups of ezTime, provide a Posix string that corresponds to your timezone (explanation). Leave empty to obtain this automatically from the server.
• Display Rotation: Allows you to rotate the display. This is useful if you need to adjust the direction in which cables protrude relative to the displayed image.

How to change the clockface (PlatformIO)

Clockwise uses PlatformIO as IDE, so the configuration is already done if you use the same. The Clockwise structure consists mainly of three folders

• clockfaces: contains the collection of available clockfaces. This folder is not included when compiling
• lib: contains the basic code for Clockwise to work and in addition a symbolic link to the current clockface
• src: contains the entry point for the clock code

.
├── clockfaces
│   ├── cw-cf-0x01
│   ├── cw-cf-0x02
│   └── cw-cf-0x03
├── lib
│   ├── cw-commons
│   ├── cw-gfx-engine
│   └── timeinwords -> ../clockfaces/cw-cf-0x02/
└── src
    └── main.cpp

Clone this repository and then run the following command to clone the clockface submodules

.../clockwise$ git submodule update --init firmware/clockfaces

To create the symbolic link run the following command inside lib/ folder:

.../clockwise/firmware/lib$ ln -s ../clockfaces/cw-cf-0x02/ timeinwords

Or, if you prefer, you can get the same result by copying the desired clockface folder into lib/

The same way as web flashing, when connecting for the first time you will have to configure the wifi, follow the instructions in Configuring WiFi section above.

How to change the clockface (esp-idf)

You can use the official Esspressif IoT Development Framekwork (aka esp-idf) to build and upload this project to an ESP32 device, including the ESP32-Trinity board.

Install esp-idf

Follow the Step By Step installation instructions.

Setup the environment variables

Follow the instructions here.

Clone and build this project

• git clone --recurse-submodules https://github.com/jnthas/clockwise.git
• idf.py reconfigure
• idf.py menuconfig (select Clockwise Configuration and choose the clockface)
• idf.py flash
• idf.py monitor