https://github.com/savjee/arduino-pca9551

https://github.com/savjee/arduino-pca9551

arduino driver led pca9551

Last synced: 3 months ago
JSON representation

• Host: GitHub
• URL: https://github.com/savjee/arduino-pca9551
• Owner: Savjee
• License: mit
• Created: 2019-07-08T17:41:16.000Z (about 7 years ago)
• Default Branch: master
• Last Pushed: 2020-07-28T14:10:56.000Z (about 6 years ago)
• Last Synced: 2025-03-15T18:51:58.323Z (over 1 year ago)
• Topics: arduino, driver, led, pca9551
• Language: C++
• Size: 4.88 KB
• Stars: 2
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
Arduino library for PCA9551




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*Arduino library for the [PCA9551](https://www.nxp.com/docs/en/data-sheet/PCA9551.pdf) i2c LED Driver. Supports on/off and PWM.*

*🧪This is work in progress.*

---

## ⛏️ How to use

Start by installing the library and including it in your sketch. Also don't forget to import `Wire` and initialize the i2c bus:

```cpp

#include 

#include 

// Initialize i2c

Wire.begin();

```

Create a new instance of the LED driver. Possible addresses are `PCA9551_ADDR_1` until `PCA9551_ADDR_8` (which is `0x60` to `0x67`):

```cpp

PCA9551 ledDriver = PCA9551(PCA9551_ADDR_1);

```

Now you can manipulate the LEDs:

```cpp

ledDriver.turnAllOn();

ledDriver.turnAllOff();

ledDriver.setLedState(0, LED_ON);

ledDriver.setLedState(0, LED_OFF);

```

The `setLedState` function takes two arguments: the index of the led you want to control and the new state for that LED.

## 😠 Limitations

* PWM support has not been tested yet (although some code is already set up)

* When using `setLedState` you can only control 1 LED, all others will be turned off by default.

## ✍️ Contribute

Feel free to fork this project, open issues and submit pull requests!