User manual

RN-52-EK-UG

www.rovingnetworks.com Version 1.0 1/27/13 page 6

Advanced Information

4.0 POWER UP THE BOARD

To power up the board, connect the board and mini-speakers to a power source via USB. Then

press and hold the board’s power on button until the speakers issue a two tone alert.

The board’s status LEDs give you a visual confirmation that the board is powered up and oper-

ating. See Table 4-1.

5.0 USING THE EVALUATION KIT

This section assumes that you have a working knowledge of Bluetooth operation and communi-

cations. To program the Roving Networks devices you need a Bluetooth-enabled PC (either built-

in or using a USB Bluetooth dongle). You can only program one device at a time. Once pro-

grammed and configured, device settings are saved (independent of power down) until they are

explicitly changed or the factory defaults are restored.

5.1 Command Mode vs. Data Mode

The Bluetooth device operates in two modes: data mode (default) and command mode. While in

data mode, the module is essentially a data pipe. When the module receives data, it strips the

Bluetooth headers and trailers and passes the user data to the UART. When data is written to the

UART, the module constructs the Bluetooth packet and sends it out over the Bluetooth connec-

tion. Thus, the entire process of sending/receiving data to the host is transparent to the end

microprocessor. See Figure 1-3.

FIGURE 1-3: DATA & COMMAND MODES

TABLE 4-1: STATUS LEDS

LED Status Description

Blue and red Flashing The RN52 module is discoverable.

Blue only Flashing The module is connectable.

Red only Flashing The module is connected.

UART

Bluetooth Interface

Bluetooth

Module

Command

Mode

GPIO9 Driven Low

with a Jumper

User Data

Bluetooth

Host