2 BT devices connected to ESP32 at the same time

[walid2009]

Hello!
I was working on a project with a ESP32 Lolin32 lite where I'm using a phone connected to the esp by bt to send some data and then based on what the ESP32 received it will send other data to another BT phone. I couldn't find many info online so I was wondering if it's even possible.
Thank you

[walid2009]

After hours of research I found this code here:

#include <BluetoothSerial.h>

BluetoothSerial SerialBT;
char receivedChars[256];  // Array to store received data
boolean newData = false;  // Flag to indicate new data received

void setup() {
  Serial.begin(115200);
  SerialBT.begin("ESP32_BT");  // Set Bluetooth name
  Serial.println("Waiting for Bluetooth connection...");
}

void loop() {
  if (SerialBT.available()) {
    char c = SerialBT.read();
    if (c == '\n') {  // End of transmission character
      receivedChars[SerialBT.available()] = '\0';  // Add null terminator
      newData = true;  // Set flag to indicate new data received
    } else {
      // Append character to receivedChars array
      strncat(receivedChars, &c, 1);
    }
  }

  if (newData) {
    Serial.println("Received data: " + String(receivedChars));

    // Process the received data if needed

    // Send the received data to another phone via Bluetooth
    sendBluetoothData(receivedChars);

    // Reset the receivedChars array and flag for new data
    memset(receivedChars, 0, sizeof(receivedChars));
    newData = false;
  }
}

void sendBluetoothData(const char* data) {
  // Connect to the other phone via Bluetooth
  BluetoothSerial bt;
  bt.begin("OTHER_PHONE_BT");  // Set Bluetooth name of the other phone

  // Send the data to the other phone
  bt.println(data);

  // Disconnect from the other phone
  bt.end();
}

But I noticed that at the end it disconnects from the second BT device. Is it a problem if I let it connected? Because this is a moving robot and the second device will be on it so that when I receive the data from the esp, using a text to speech tool I can hear the answer, so if I can't let it connected I'll have to take the tablet, reconnect it again and put it back on the robot which is not the best thing in the world