CLUE-SensorLogger-Arduino

Firmware for the Adafruit CLUE (nRF52840 Express) - sensor tests with Bluetooth LE capability

Notes

This repository is currently under construction.

Starting off with bluefruit_playground.ino

I have decided to start off this project by using the bluefruit_playground.ino example Arduino sketch,
as my main goal is to write a mobile client application for the Adafruit CLUE anyway. The original has been cleaned up/refactored a bit to taste.

As of now, this firmware works with Adafruit's Bluefruit Playground application (https://github.com/adafruit/Bluefruit-Playground), and I intend to write my own mobile client for iOS -- mainly for my own educational/personal pursuit.

arduino-cli to build

You will need to have arduino-cli installed in your command line/Terminal to build the project with these instructions. If you already have the Arduino desktop application/Arduino IDE, you can open the SensorLogger.ino file in the IDE and compile/upload from there.

Otherwise, read below for instructions on building with arduino-cli.

• Start by getting your CLUE's port and FQBN:

  arduino-cli board list
  

  • (result):

  Port                            Protocol Type              Board Name    FQBN                        Core          
  /dev/cu.BLTH                    serial   Serial Port       Unknown                                                 
  /dev/cu.Bluetooth-Incoming-Port serial   Serial Port       Unknown                                                 
  /dev/cu.usbmodem231101          serial   Serial Port (USB) Adafruit CLUE adafruit:nrf52:cluenrf52840 adafruit:nrf52
  /dev/cu.usbmodem231401          serial   Serial Port (USB) Unknown    
  

• To build/upload the project to the CLUE, we will need:

  • port
    • (dev/cu.usbmodem231101) in this example, may be different on your machine.
  • FQBN
    • (adafruit:nrf52:cluenrf52840) is what you will also use to compile this project.
  • project directory
    • (SensorLogger) is what you will also use to compile this project.

• Next, set your CLUE in DFU mode by pressing the RESET button twice.

• Finally, compile and upload the project.

  • Generally, to build and compile in one command:

  arduino-cli compile [project directory] -b [FQBN] -u -p [port]
  

  • Using our port, FQBN, and project directory:

    arduino-cli compile SensorLogger -b adafruit:nrf52:cluenrf52840 -u -p /dev/cu.usbmodem231101
    

    • Remember that the port parameter is based off of this example, and you'll want to run arduino-cli board list on your own to see what the port value is on your machine.

• The built firmware should now be uploaded and running on your CLUE.

• You can verify this by using a Bluetooth device sniffer (or your mobile phone's Bluetooth preferences) to see if your CLUE is advertising.

• For ease of use, you can edit the upload script and provide arguments for the FQBN and PORT variables from arduino-cli board list, so that way, you need not type out the full command to compile and build each time when needed.

  • Just run the following in the terminal, after editing the FQBN and PORT variables:

    ./upload
    

    • Examples for FQBN and PORT were provided, but they might not work on your system.