Hi,

Need to control a Neopixel ( WS2812b) RGB led over BLE, using a custom app ?

Then, there you go!



1. The nRF52 side :

The nRF52 firmware is running on the Adafruit nRF52840 express board. The board has a Neopixel, and that's one of the reasons to test with it. Otherwise you'll need a WS2812b module.

The firmware is based off the nRF5_sdk, and support versions starting from 15.3.

The nRF52 SOC is using the I2S to drive the Neopixel.

The project is using SEGGER as a toolchain.

2. The mobile app side:

The app is a hybrid application built using the ionic framework. And uses the cordova-plugin-ble-central as a plugin for the BLE functionalities.

The app has two pages :

* The home page : Used to scan for PIXEL devices. Note that the app will only display the ble devices that advertises the same service as the PIXEL. The service UUID is included in the nRF52 firmware files.

* The details page : This is where the app connects to the selected device (in the home page), and send the control data which are the RGB values (r,g,b) to the nRF52, that will use them to generate the appropriate wave-forms to drive the WS2812b over the I2S peripheral.


Please find the project source files, including a built version of the Android app in the following github repo.


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