ESP32 Dev Board bluetooth not connecting

Projects Networking, Protocols, and Devices
1

been testing different settings, it initializes but will not connect nor can i see it as a device.

outputting some debugging

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)

configsip: 0, SPIWP:0xee

clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00

mode:DIO, clock div:1

load:0x3fff0030,len:4888

load:0x40078000,len:16516

load:0x40080400,len:4

load:0x40080404,len:3476

entry 0x400805b4

=== ESP32 Basic Test ===

Starting...

1. Initializing BLE...

2. Creating BLE Server...

3. Starting advertising...

Setup complete!

System running...

here is my code im uploading

#include <Arduino.h>
#include <BLEDevice.h>
#include <BLEServer.h>

const int LED_PIN = 2;

void setup() {
    Serial.begin(115200);
    delay(1000);  // Give serial time to initialize
    
    pinMode(LED_PIN, OUTPUT);
    
    // Flash LED to show we're starting
    for(int i = 0; i < 3; i++) {
        digitalWrite(LED_PIN, HIGH);
        delay(100);
        digitalWrite(LED_PIN, LOW);
        delay(100);
    }
    
    Serial.println("\n=== ESP32 Basic Test ===");
    Serial.println("Starting...");
    
    // Try to initialize BLE
    Serial.println("1. Initializing BLE...");
    BLEDevice::init("ESP32_TEST");
    delay(1000);
    
    Serial.println("2. Creating BLE Server...");
    BLEServer *pServer = BLEDevice::createServer();
    delay(1000);
    
    Serial.println("3. Starting advertising...");
    BLEAdvertising *pAdvertising = pServer->getAdvertising();
    pAdvertising->start();
    
    Serial.println("Setup complete!");
}

void loop() {
    // Simple LED blink to show we're running
    digitalWrite(LED_PIN, HIGH);
    delay(500);
    digitalWrite(LED_PIN, LOW);
    delay(500);
    
    Serial.println("System running...");
}

actual board

AITRIP 2 Sets ESP-WROOM-32 ESP32 ESP-32S Type-C USB Development Board Type-C USB CH340C WiFi+Bluetooth Ultra-Low Power Dual Core ESP32-DevKitC-32 ESP-WROOM-32 Expansion Board for Arduino

I have 2 and tried both same issue, any advice or reccomndation on a better board, i would like a 8 mb of ram as i want to store wav files directly

2

looks like this is what I should have tried first Arduino® Nano ESP32 with headers

3

Can you run the ESP32 BLE example sketch for the server?

File>Examples>BLE>Server

it initializes but will not connect nor can i see it as a device.

What are you using to look for the server?

4

Was using iPhone detect, also had code to connect to BT speaker when initiating paring from the speaker but never worked.

5

if I run your code from post 1 on an ESP32 Dev module and then run BLE terminal on my Android phone a scan shows

image
image270×585 21.8 KB

6

I must have 2 defective boards then, I have tried many attempts with no success,, ty for confirming the dev code is working.

7

very odd - never had such problems and I have about 20 ESP32 modules

try a simpler example, e.g. File>Examples>BLE>UART which should send/receive using BLT terminal

8

these were amazon knock offs

9

More to the point would be a result from using simpler, and more sensible code, as advised in reply #7.

10

Ran the excample,

ets Jul 29 2019 12:21:46

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)

configsip: 0, SPIWP:0xee

clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00

mode:DIO, clock div:1

load:0x3fff0030,len:4888

load:0x40078000,len:16516

load:0x40080400,len:4

load:0x40080404,len:3476

entry 0x400805b4

Waiting a client connection to notify...

Ln 1, Col 1

ESP32 Dev Module

on COM3

2

not showing as a bt device

11

what smartphone app are you using to do the BLE scan?

if I run File>Examples>BLE>UART on an ESP32 BLE terminal on an Android phone scan displays

image
image270×585 21.9 KB

if I transmit ASCII text from phone

image
image270×585 57.9 KB

the ESP32 serial monitor displays

Waiting a client connection to notify...
*********
Received Value: hello

*********
*********
Received Value: 1234567890

*********
start advertising
*********
Received Value: hello esp32

*********
12

The built in apple bluetooth app, searching for devices....

13

I ordered some Adrino nano esp32 devices to move forward with