Bluetooth AT-09 / HT-10 question

Using Arduino Networking, Protocols, and Devices
1

Hello dear friends, I am seeking help :slight_smile:

I have a BLE Bluetooth module AT-09 and I have 2 kind of problems.
The BLE is properly connected to the UNO, the jumper goes from TX through a voltage divider , and then to the RX of the AT09 (3.3V is entering the RX).

  1. It is quite tricky to discover the BLE and connect it to my phone or laptop, because they do not recognize the BLE.
    I managed to connect it to my phone using an app from play store. The BLE is visible but i cant connect it using common methods. What could be the problem ? :confused:

  2. When I use that BLE app, I can send information's to the Arduino via Phone, but I cant do the opposite. I can not print any data to my Phone app.

#include <SoftwareSerial.h>
SoftwareSerial BLE(4, 5); // RX, TX

char data;
boolean flag = false;

void getData() {
  if ( BLE.available() > 0) {
    data = BLE.read();
    flag = true;
  }
}

void printData() {
  if (flag == true) {
    Serial.println(data);
    flag = false;
    }
}


void setup() {
  Serial.begin(9600);
  BLE.begin(9600);
  BLE.print("Arduino.cc forum rocks");    //this is just an example

}

void loop() {

  getData();
  printData();
  
  }

Thanks in advance :slight_smile: