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Using arduino IDE with bluey

Installation

Uploading without programmer requires bootloader programmed on the board. The repo electronut/bluey_serial_dfu_bootloader contains the source and precompiled hex file of the bootloader as hex/s132_nrf52_2.0.0_softdevice.hex.

The bootloader has the softdevice s132 in it, so no other action is needed to use the BLEPeripheral library.

Bootloader mode is triggered by pressing and holding both prss buttons on bluey and releasing the reset button. The blue LED will start blinkng at an accelerating rate repeatedly to indicate that the bootloader mode is active.

Board Manager

  1. Download and install the Arduino IDE (At least v1.6.12)
  2. Start the Arduino IDE
  3. Go into Preferences
  4. Add https://raw.github.com/electronut/arduino-boards/master/package_electronutlabs_boards_index.json as an "Additional Board Manager URL"
  5. Open the Boards Manager from the Tools -> Board menu and install "Electronut labs nRF5 Boards"
  6. Select 'Electronut labs bluey' from the Tools -> Board menu

NOTE: During installation it takes the Arduino IDE a few minutes to extract the tools after they have been downloaded, please be patient.

Uploading Bootloader

Although Bluey is shipped with the bootloader that enables programming the device using Arduino IDE, in case you erase the bootloader from Bluey, it is possible to flash it again using a Bumpy.

Steps

  1. Download bootloader
  2. Open command prompt and access the directory containing bootloader hex file.
  3. Follow steps as mentioned in the Bumpy github repository to connect and attach to Bluey target.
  4. Issue: load s132_nrf52_2.0.0_softdevice.hex command. Wait for the command to execute and load the file completely.
  5. Issue: detach command to free the target.
  6. Issue: Quit command to close arm-gdb debugger.
  7. Unplug Bumpy.
  8. Connect Bluey to your PC via USB cable. You should notice the familiar blue LED blinkking at an accelerating rate, indicating Bluey is in bootloader mode.

Usage

  • After tools installation, you can now select "Electronut labs bluey" from the tools menu, and other related options.

  • Bluey comes preprogrammed with [serial DFU bootloader], which Nordic's nrfjprog utility can program using serial connection. To trigger bootloader, press and hold button1, press the Reset button and then release button1.

  • Bluey's blue LED will start blinking in a 'timebomb' pattern, indicating that it is in DFU bootloader mode. Now you can press upload button in arduino IDE to program your code.

Pin mapping

                    Connector P3 on bluey

     A0       P0.02/AIN0   | 1   2 | P0.26        D0
     A1       P0.03/AIN1   | 3   4 | P0.27        D1
     A2       P0.04/AIN2   | 5   6 | P0.24/AIN4   A3
     D2            P0.22   | 7   8 | P0.29/AIN5   A4
     D3            P0.23   | 9  10 | P0.30/AIN6   A5
     D4            P0.24   | 11 12 | P0.31/AIN7   A6
     D5            P0.25   | 13 14 | Ex_vin
                     GND   | 15 16 | 3v3
                     GND   | 17 18 | GND


          button D6  - P0.16
              R  D7  - P0.19
              G  D8  - P0.18
              B  D9  - P0.17

      D10     SCL - P0.11    DRDYn - P0.12   D11
      D12     SDA - P0.13      INT - P0.14   D13
      D14    INT1 - P0.15     INT2 - P0.20   D15

              RXD - P0.08    TXD - P0.06
              RTS - P0.05    CTS - P0.07

              SS - P0.22    SCK - P0.25
            MISO - P0.24   MOSI - P0.23
  • LED and button pins can be referenced by PIN_LEDR, PIN_LEDG, PIN_LEDB ,LED_BUILTIN (red one), PIN_BUTTON in arduino code.

Low Frequency Clock Source (LFCLKSRC)

If the selected board has an external 32 kHz crystal connected, it will be used as the source for the low frequency clock. Otherwise the internal 32 kHz RC oscillator will be used. The low frequency clock is used by the delay(ms) and millis() Arduino API's.

Bluey has an additional menu item under Tools -> Low Frequency Clock that allows you to select the low frequency clock source.

BLEPeriphial Arduino Library

  • arduino-BLEPeripheral library can be used creating BLE applications with bluey. Follow installation steps on it's README. See the library's API for more details on usage.

  • Ensure that Softdevice:"S132" is selected under tools menu. This is essential to compile BLE examples.

  • NOTE: Although the description says "nRF8001 or nRF51822", but nRF52832 is also supported because despite changes in CPU and peripherals, the radio interface is identical in both (API is same, but there might be changes in power/sensitivity etc.)

  • Once installed, you can see examples for this in examples menu. You can run most examples without modifications, unless some specify LED or button pins different from bluey's, in which case, just replace pin numbers with LED_BUILTIN, or PIN_BUTTON etc.

  • Use nRF connect (and other apps from nordic on play store) to scan, connect, interact with BLE peripherals created with these examples.