Bluetooth: Sending message from Arduino to App Inventor

Hello, i am trying to send a value from Arduino Uno Wifi Rev 2 (which has a bluetooth module) to App Inventor via bluetooth. The problem is whenever i press scan there are no devices available. I can't find it with nRF Connect app either. Here are the block i used:

Any help is appreciated, thank you in advance.

Show your sketch code too.

Hey, thank you very much for the extension i can see my Arduino address now. The problem is after i click on the address nothing is happening. I am trying to make the list view invisible and the labels where i will store my value visible. Here are the blocks:

And here's my Arduino code:(i added the corresponding UUIDs)

#include <ArduinoBLE.h>

BLEService dataService(" ");
BLEByteCharacteristic dataCharacteristic(" ", BLEWrite);
void setup() {
while (!Serial);

if (!BLE.begin()) {
Serial.println("Starting BLE failed!");
while (1);



Serial.println("Bluetooth initialized.");

void loop() {
if (Serial.available()) {
int value = Serial.parseInt();

if (value != 0) {
  Serial.println("Value sent: " + String(value));


"Location" must be enabled on all Android versions:

I don't see any connect block. Post all relevant blocks (and the aia).