Arduino nano to app

sunim · September 18, 2021, 12:21am

I am able to train my model and get the result in arduino serial monitor. Now I want to show these results to application via BLE. Can anyone help me how to do so? I can show the values of temperature, humidity, pressure, but not other results. I am using Arduino nano 33 ble sense and CCS811.
Thanks

louis · September 20, 2021, 9:14am

Hello @sunim,

The arduino nano 33 ble sense uses the NRF52840 microcontroller which is the same from this one I used for a workshop with Sparkfun: https://github.com/edgeimpulse/example-SparkFun-MicroMod-nRF52840

You would need to include #include <ArduinoBLE.h> in your arduino sketch.

Feel free to checkout the sketch enclosed below as an example (it won’t work with the Arduino Nano 33 BLE Sense as the accelerometer is not the same) but the idea is similar.

github.com

edgeimpulse/example-SparkFun-MicroMod-nRF52840/blob/main/arduino-examples/inference-over-bluetooth/inference-over-bluetooth.ino#L27


* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/* Includes ---------------------------------------------------------------- */
#include <Wire.h>
#include "SparkFun_LIS2DH12.h" //Click here to get the library: http://librarymanager/All#SparkFun_LIS2DH12
SPARKFUN_LIS2DH12 accel;       //Create instance
#include <ArduinoBLE.h>        //Click here to get the library: http://librarymanager/All#ArduinoBLE 
#define  DEBUG_FLAG 0 // Flag to control Serial debugging messages
// User defined service, using python to generate uuid: 
// >>> import uuid
// >>> uuid.uuid5(uuid.NAMESPACE_DNS, 'edgeimpulse.com')
BLEService inferenceService("2d0a0000-e0f7-5fc8-b50f-05e267afeb67");  
BLEStringCharacteristic inferenceCharacteristic("2d0a0001-e0f7-5fc8-b50f-05e267afeb67", BLERead | BLENotify, 56); // remote clients will be able to get notifications if this characteristic changes
/* Include Edge Impulse Library -------------------------------------------------------- 
* Modify the following line according to your project name
* Do not forget to import the library using "Sketch">"Include Library">"Add .ZIP Library..."

Regards,

Louis