Datasheet

Dual Roles BLEUART

This example demonstrates how you can use a Feather nRF52 to connect to two other Bluefruit or BLE devices using

the bleuart (AKA 'NUS') service concurrently, with the device running at both a peripheral and a central at the same

time.

This dual role example acts as a BLE bridge that sits between a central and a peripheral forwarding bleuart messages

back and forth, as shown in the image below:

Server & Client Service Setup

Since the Bluefruit device will act as both a central and a peripheral, we will need to declare both server and client

instance of the bleuart helper class:

Before we can configure client services, Bluefruit.begin() must be called with at least 1 for the number of concurrent

connection for both peripheral and central mode:

After this, client services must be initialized by calling their begin() function, followed by any callbacks that you wish to

wire up as well:

If you are not familiar with Central Role, it is advised to look at the "Central BLEUART" example first then

continue with this afterwards.

// Peripheral uart service

BLEUart bleuart;

// Central uart client

BLEClientUart clientUart;

// Initialize Bluefruit with max concurrent connections as Peripheral = 1, Central = 1

Bluefruit.begin(1, 1);

// Configure and Start BLE Uart Service

bleuart.begin();

bleuart.setRxCallback(prph_bleuart_rx_callback);

// Init BLE Central Uart Serivce

clientUart.begin();

clientUart.setRxCallback(cent_bleuart_rx_callback);