Arduino BLE to micropython board

Projects Networking, Protocols, and Devices
1

Something in my code does not work as expected. In my Ino file, I first initialise the BLE (and the sensor) during setup and then loop the BLE which uses IMU data to send this. At least, that is what I want to.

Currently, I am able to connect the devices (the board of the Arduino code and a micropython board) and to test, I connected my android phone with my Arduino board which works fine. However, sending data is not succesful. If I read the data of the characteristic on my phone, it is always 0. On my micropython board, I cannot read the characteristic. (In Arduino is the server, in micropython the client (but I have central/peripheral notes as well)

Therefore, I tried printing the characteristic as you can see in the code below. The current output gives: This is no movement: 1. However, in my opinion, this comment should give characteristic 0.

What am I doing wrong? Thanks

This is my cpp file of the BLE code, in which I guess the mistake(s) are:

#include "BLE.h"


// Client
BLE_Class::BLE_Class() : IMUService("0x183E"), IMUCharacteristic("0x0541", BLERead | BLEWrite | BLENotify){ 

}

  // functions for the BLE connection
void BLE_Class::BLE_initialisation() {
  Serial.begin(9600);
  while (!Serial);

  //pinMode(ledPin, OUTPUT);

  // if failed to initialise, print
  if (!BLE.begin()) {
    Serial.println("Starting BLE module failed.");

    while (1);
  }

  // set names
  BLE.setLocalName("Plushie");
  BLE.setAdvertisedService(IMUService);

  // add characteristic to service
  IMUService.addCharacteristic(IMUCharacteristic);

  // add service
  BLE.addService(IMUService);

  BLE.advertise();

  Serial.println("BLE server is discoverable");

  }

void BLE_Class::BLE_loop() {
  BLEDevice central = BLE.central();

  IMU_check = sense.scan_sensors();

  if (central) {
    Serial.print("Connected to client: ");
    Serial.println(central.address());

    while(central.connected()) {
      BLE.advertise();
      if (IMU_check == 1){
        //Serial.print("Movement detected");
        IMUCharacteristic.writeValue(1);
        Serial.print("this is movement");
        Serial.println(IMUCharacteristic);
        BLE.advertise();
      }
      else if (IMU_check == 0){
        IMUCharacteristic.writeValue(0);
        Serial.print("This is no movement:");
        Serial.println(IMUCharacteristic);
      }

    }
    Serial.print(F("Disconnected from client: "));
    Serial.println(central.address());
  }
}
pert 2

I moved your topic to an appropriate forum category @thesislife.

In the future, please take some time to pick the forum category that best suits the subject of your topic. There is an "About the _____ category" topic at the top of each category that explains its purpose.

This is an important part of responsible forum usage, as explained in the "How to get the best out of this forum" guide. The guide contains a lot of other useful information. Please read it.

Thanks in advance for your cooperation.

3

Thank you. I will do that in the future. I fixed my issue. It was caused by the sensor scanning placed outside of the while connected which means it only scanned once.