The HT16K33 is a memory mapping and multi-function LED controller driver.
Grove - LED Matrix Driver is an I2C device, just connect it to the I2C, and power it with 5V.
This example shows the bar mode. There are 33 levels of the bar. It can be used to display distance, volume, or etc.
This example shows the icon mode. There are 29 icons in our library, include some smile faces, arrows, shapes... If you want to make you own icons, please go to display_custom_pictures.
This example shows how to display a integer number. The display range of writeNumber() is int32_t (from -2147483648 to 2147483647).
This example shows how to display a string. The string size should be less than 48(if you want more, please change MAX_BIG_BUFFER_SIZE at the header file).
This example shows how to make your own pictures and display them. Firstly, create uint64_t type 8x8 matrix picture at https://xantorohara.github.io/led-matrix-editor/# .
Then copy the uint64_t array(on the right side of the page) to your arduino IDE and pass the array name to writePictures() or writeOnePicture().
This example shows how to set offset and rotate. Note that setDisplayOffset() works after call display() and setDisplayOrientation works after call writeXXX().
You can use setBrightness() to change the brightness of LED. Note that the brighter you set, the larger current will be needed.
When set setBlinkRate(BLINK_1HZ) or setBlinkRate(BLINK_2HZ), LED will blink automatically.
More informations in Grove_LED_Matrix_Driver_HT16K33.h
There are 8 possible I2C address of this grove, from 0x70 to 0x77. You can change the I2C address by soliding those pads in a red box in the following picture. For example, if I want to change the address to 0x73, I need to connect pad A1,A0 and disconnect pad A2. Then I will get address 0b01110011, that is 0x73.
This software is written by Jerry Yip for seeed studio and is licensed under The MIT License. Check License.txt for more information.
Contributing to this software is warmly welcomed. You can do this basically by
forking, committing modifications and then pulling requests (follow the links above
for operating guide). Adding change log and your contact into file header is encouraged.
Thanks for your contribution.
Seeed Studio is an open hardware facilitation company based in Shenzhen, China.
Benefiting from local manufacture power and convenient global logistic system,
we integrate resources to serve new era of innovation. Seeed also works with
global distributors and partners to push open hardware movement.
2025-1-20: Introduced software IIC to support multi-bus control devices, and introduced the I2Cdev_interface layer to provide a unified interface for hardware IIC and software IIC to the application layer; Added dual-bus demo;