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BLE_Chat_Master_Slave_main.c File Reference

This is a Chat demo that shows how to implement a simple 2-way communication between only two BlueNRG-1 devices (single application for both devices). More...

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## Detailed Description

This is a Chat demo that shows how to implement a simple 2-way communication between only two BlueNRG-1 devices (single application for both devices).

# ATOLLIC project

To use the project with ATOLLIC TrueSTUDIO for ARM, please follow the instructions below:

1. Open the ATOLLIC TrueSTUDIO for ARM and select File->Import... Project menu.
2. Select Existing Projects into Workspace.
3. Select the ATOLLIC project
4. Select desired configuration to build from Project->Manage Configurations
5. Select Project->Rebuild Project. This will recompile and link the entire application
6. To download the binary image, please connect STLink to JTAG connector in your board (if available).
7. Select Project->Download to download the related binary image.
8. Alternatively, open the BlueNRG1 GUI, put the board in bootloader mode and download the built binary image.

# KEIL project

To use the project with KEIL uVision 5 for ARM, please follow the instructions below:

1. Open the KEIL uVision 5 for ARM and select Project->Open Project menu.
2. Open the KEIL project `...\Project\BLE_Examples\BLE_Chat_Master_Slave\MDK-ARM\BLE_Chat_Master_Slave.uvprojx`
3. Select desired configuration to build
4. Select Project->Rebuild all target files. This will recompile and link the entire application
5. To download the binary image, please connect STLink to JTAG connector in your board (if available).
6. Select Project->Download to download the related binary image.
7. Alternatively, open the BlueNRG1 GUI, put the board in bootloader mode and download the built binary image.

# IAR project

To use the project with IAR Embedded Workbench for ARM, please follow the instructions below:

1. Open the Embedded Workbench for ARM and select File->Open->Workspace menu.
2. Open the IAR project `...\Project\BLE_Examples\BLE_Chat_Master_Slave\EWARM\BLE_Chat_Master_Slave.eww`
3. Select desired configuration to build
4. Select Project->Rebuild All. This will recompile and link the entire application
5. To download the binary image, please connect STLink to JTAG connector in your board (if available).
6. Select Project->Download and Debug to download the related binary image.
7. Alternatively, open the BlueNRG1 GUI, put the board in bootloader mode and download the built binary image.

## Project configurations

- `Release` - Release configuration

# Boards supported

- `STEVAL-IDB007V1`

# Power configuration settings

STEVAL-IDB007V1
Jumper name |  | Description
JP1 | JP2 |
ON 1-2 | ON 2-3 | USB supply power
ON 2-3 | ON 1-2 | The supply voltage must be provided through battery pins.
ON 1-2 |  | USB supply power to STM32L1, JP2 pin 2 external power to BlueNRG1

# Jumper settings

STEVAL-IDB007V1
Jumper name | Description
JP1 | 1-2: to provide power from USB (JP2:2-3). 2-3: to provide power from battery holder (JP2:1-2)
JP2 | 1-2: to provide power from battery holder (JP1:2-3). 2-3: to provide power from USB (JP1:1-2). Pin2 to VDD to provide external power supply to BlueNRG-1 (JP1: 1-2)
JP3 | pin 1 and 2 UART RX and TX of MCU. pin 3 GND.
JP4 | Fitted: to provide VBLUE to BlueNRG1. It can be used also for current measurement.
JP5 | Fitted : TEST pin to VBLUE. Not fitted: TEST pin to GND

# Pin settings

PIN name | STEVAL-IDB007V1
ADC1 | Not Used
ADC2 | Not Used
IO0 | Not Used
IO1 | Not Used
IO11 | Not Used
IO12 | Not Used
IO13 | Not Used
IO14 | Not Used
IO2 | Not Used
IO3 | Not Used
IO4 | Not Used
IO5 | Not Used
IO6 | Not Used
IO7 | Not Used
IO8 | Not Used
TEST1 | Not Used

# Serial I/O

The application will listen for keys typed in one node and, on return press, it will send them to the remote node. The remote node will listen for RF messages and it will output them in the serial port. In other words everything typed in one node will be visible to the other node and viceversa.

Parameter name | Value | Unit
Baudrate | 115200 [default] | bit/sec
Data bits | 8 | bit
Parity | None | bit
Stop bits | 1 | bit

# LEDs description

LED name | STEVAL-IDB007V1
DL1 | Not Used
DL2 | Not Used
DL3 | Not Used
DL4 | Not Used

# Buttons description

BUTTON name | STEVAL-IDB007V1
PUSH1 | Not Used
PUSH2 | Not Used
RESET | Reset BlueNRG1

# Usage

The Chat Master and Slave application configures a BlueNRG-1 device as Central & Peripheral using the aci_gap_init(GAP_CENTRAL_ROLE|GAP_PERIPHERAL_ROLE, ...). Then it performs the following steps:

- It starts discovery procedure for a another BlueNRG-1 device configured with the same binary image.
- If such device is found within a random time, it starts a connection procedure and wait until a connection is established.
- If discovery procedure time expires without finding another Chat Master and Slave device, the device enters in discovery mode, waiting for another Chat Master and Slave device to discover and connect to it.
- If discovery mode time expires without any connection established, the device starts again a discovery procedure for another Chat Master and Slave device.
- When a connection is established, the device role are defined (Client or Server) and the Chat communication channel can be used.

The Chat Service contains 2 Characteristics:

1. The TX Characteristic: the Client device can enable notifications on this characteristic. When the Server device has data to be sent, it will send notifications which will contains the value of the TX Characteristic
2. The RX Characteristic: it is a writable caracteristic. When the Client device has data to be sent to the Server device, it will write a value into this characteristic.

The maximum length of the characteristic value is 20 bytes.

Definition in file BLE_Chat_Master_Slave_main.c.