Hi everyone,
I'm facing a strange error using Esp32 Cam streaming in AP mode and BLE at the same time.
My code for first call a function that start the streaming then, after 10 second, call the function for start BLE.
Until the StartBLE() function is called the code works well and i can connect to the esp32 and watch cam streaming, but after that the build-in led turn on and on the serial monitor strange character appears, then the esp32 stops working.
I really not know what I have to do.
This is my code:
int x, y;
#include "ble.h"
#include "stream.h"
#define RledPIN 2
#define GledPIN 15
#define YledPIN 13
#define WledPIN 4
void setup() {
pinMode(RledPIN, OUTPUT);
pinMode(GledPIN, OUTPUT);
pinMode(YledPIN, OUTPUT);
pinMode(WledPIN, OUTPUT);
digitalWrite(RledPIN, LOW);
digitalWrite(GledPIN, LOW);
digitalWrite(YledPIN, LOW);
digitalWrite(WledPIN, LOW);
StartStreaming();
delay(10000);
StartBLE();
}
void loop() {
manageConnections();
if(x==1){
digitalWrite(RledPIN, HIGH);
}
if(x==2){
digitalWrite(RledPIN, LOW);
}
if(x==3){
digitalWrite(GledPIN, HIGH);
}
if(x==4){
digitalWrite(GledPIN, LOW);
}
if(x==5){
digitalWrite(YledPIN, HIGH);
}
if(x==6){
digitalWrite(YledPIN, LOW);
}
if(x==7){
digitalWrite(WledPIN, HIGH);
}
if(x==8){
digitalWrite(WledPIN, LOW);
}
delay(1000);
}
ble.h:
#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEServer.h>
#include "soc/soc.h"
#include "soc/rtc_cntl_reg.h"
#define SERVICE_UUID "41003a80-2b6b-4198-bc3b-b30010558593"
#define X_CHARACTERISTIC_UUID "ef7a6195-c729-46d4-b18e-524850f58a7d"
#define Y_CHARACTERISTIC_UUID "d18f5ecc-2ca1-4e58-9ba1-288970b32162"
BLEServer* pServer = NULL;
BLECharacteristic* pXCharacteristic = NULL;
BLECharacteristic* pYCharacteristic = NULL;
bool deviceConnected = false;
bool oldDeviceConnected = false;
class ServerCallbacks: public BLEServerCallbacks {
void onConnect(BLEServer* pServer) {
deviceConnected = true;
};
void onDisconnect(BLEServer* pServer) {
deviceConnected = false;
}
};
class xCharacteristicCallbacks: public BLECharacteristicCallbacks {
void onWrite(BLECharacteristic *characteristic) {
std::string value = characteristic->getValue();
if (value.length() > 0) {
Serial.print("x: ");
if (value.length() == 1) {
x = value[0];
Serial.println(x);
}
}
}
};
class yCharacteristicCallbacks: public BLECharacteristicCallbacks {
void onWrite(BLECharacteristic *characteristic) {
std::string value = characteristic->getValue();
if (value.length() > 0) {
Serial.print("y: ");
if (value.length() == 1) {
y = value[0];
Serial.println(y);
}
}
}
};
void manageConnections(){
// disconnecting
if (!deviceConnected && oldDeviceConnected)
{
delay(500); // give the bluetooth stack the chance to get things ready
pServer->startAdvertising(); // restart advertising
Serial.println("start advertising");
oldDeviceConnected = deviceConnected;
}
// connecting
if (deviceConnected && !oldDeviceConnected)
{
oldDeviceConnected = deviceConnected;
Serial.println("connecting");
}
}
void StartBLE() {
WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0);
Serial.begin(115200);
// Create the BLE Device
BLEDevice::init("ESP32");
// Create the BLE Server
pServer = BLEDevice::createServer();
pServer->setCallbacks(new ServerCallbacks());
// Create the BLE Service
BLEService *pService = pServer->createService(SERVICE_UUID);
// Create BLE Characteristics
// ASCII
pXCharacteristic = pService->createCharacteristic(
X_CHARACTERISTIC_UUID,
BLECharacteristic::PROPERTY_READ |
BLECharacteristic::PROPERTY_WRITE |
BLECharacteristic::PROPERTY_NOTIFY
);
pXCharacteristic->setCallbacks(new xCharacteristicCallbacks());
pYCharacteristic = pService->createCharacteristic(
Y_CHARACTERISTIC_UUID,
BLECharacteristic::PROPERTY_READ |
BLECharacteristic::PROPERTY_WRITE |
BLECharacteristic::PROPERTY_NOTIFY
);
pYCharacteristic->setCallbacks(new yCharacteristicCallbacks());
// Start the service
pService->start();
// Start advertising
BLEAdvertising *pAdvertising = BLEDevice::getAdvertising();
pAdvertising->addServiceUUID(SERVICE_UUID);
pAdvertising->setScanResponse(false);
pAdvertising->setMinPreferred(0x0); // set value to 0x00 to not advertise this parameter
BLEDevice::startAdvertising();
Serial.println("BLEok");
}
stream.h:
#include "esp_camera.h"
#include <WiFi.h>
#include "esp_timer.h"
#include "img_converters.h"
#include "Arduino.h"
#include "fb_gfx.h"
#include "soc/soc.h" //disable brownout problems
#include "soc/rtc_cntl_reg.h" //disable brownout problems
#include "esp_http_server.h"
// Replace with your network credentials
const char* ssid = "ESP32-Access-Point";
const char* password = "123456789";
#define PART_BOUNDARY "123456789000000000000987654321"
// This project was tested with the AI Thinker Model, M5STACK PSRAM Model and M5STACK WITHOUT PSRAM
#define CAMERA_MODEL_AI_THINKER
//#define CAMERA_MODEL_M5STACK_PSRAM
//#define CAMERA_MODEL_M5STACK_WITHOUT_PSRAM
// Not tested with this model
//#define CAMERA_MODEL_WROVER_KIT
#if defined(CAMERA_MODEL_WROVER_KIT)
#define PWDN_GPIO_NUM -1
#define RESET_GPIO_NUM -1
#define XCLK_GPIO_NUM 21
#define SIOD_GPIO_NUM 26
#define SIOC_GPIO_NUM 27
#define Y9_GPIO_NUM 35
#define Y8_GPIO_NUM 34
#define Y7_GPIO_NUM 39
#define Y6_GPIO_NUM 36
#define Y5_GPIO_NUM 19
#define Y4_GPIO_NUM 18
#define Y3_GPIO_NUM 5
#define Y2_GPIO_NUM 4
#define VSYNC_GPIO_NUM 25
#define HREF_GPIO_NUM 23
#define PCLK_GPIO_NUM 22
#elif defined(CAMERA_MODEL_M5STACK_PSRAM)
#define PWDN_GPIO_NUM -1
#define RESET_GPIO_NUM 15
#define XCLK_GPIO_NUM 27
#define SIOD_GPIO_NUM 25
#define SIOC_GPIO_NUM 23
#define Y9_GPIO_NUM 19
#define Y8_GPIO_NUM 36
#define Y7_GPIO_NUM 18
#define Y6_GPIO_NUM 39
#define Y5_GPIO_NUM 5
#define Y4_GPIO_NUM 34
#define Y3_GPIO_NUM 35
#define Y2_GPIO_NUM 32
#define VSYNC_GPIO_NUM 22
#define HREF_GPIO_NUM 26
#define PCLK_GPIO_NUM 21
#elif defined(CAMERA_MODEL_M5STACK_WITHOUT_PSRAM)
#define PWDN_GPIO_NUM -1
#define RESET_GPIO_NUM 15
#define XCLK_GPIO_NUM 27
#define SIOD_GPIO_NUM 25
#define SIOC_GPIO_NUM 23
#define Y9_GPIO_NUM 19
#define Y8_GPIO_NUM 36
#define Y7_GPIO_NUM 18
#define Y6_GPIO_NUM 39
#define Y5_GPIO_NUM 5
#define Y4_GPIO_NUM 34
#define Y3_GPIO_NUM 35
#define Y2_GPIO_NUM 17
#define VSYNC_GPIO_NUM 22
#define HREF_GPIO_NUM 26
#define PCLK_GPIO_NUM 21
#elif defined(CAMERA_MODEL_AI_THINKER)
#define PWDN_GPIO_NUM 32
#define RESET_GPIO_NUM -1
#define XCLK_GPIO_NUM 0
#define SIOD_GPIO_NUM 26
#define SIOC_GPIO_NUM 27
#define Y9_GPIO_NUM 35
#define Y8_GPIO_NUM 34
#define Y7_GPIO_NUM 39
#define Y6_GPIO_NUM 36
#define Y5_GPIO_NUM 21
#define Y4_GPIO_NUM 19
#define Y3_GPIO_NUM 18
#define Y2_GPIO_NUM 5
#define VSYNC_GPIO_NUM 25
#define HREF_GPIO_NUM 23
#define PCLK_GPIO_NUM 22
#else
#error "Camera model not selected"
#endif
static const char* _STREAM_CONTENT_TYPE = "multipart/x-mixed-replace;boundary=" PART_BOUNDARY;
static const char* _STREAM_BOUNDARY = "\r\n--" PART_BOUNDARY "\r\n";
static const char* _STREAM_PART = "Content-Type: image/jpeg\r\nContent-Length: %u\r\n\r\n";
httpd_handle_t stream_httpd = NULL;
static esp_err_t stream_handler(httpd_req_t* req) {
camera_fb_t* fb = NULL;
esp_err_t res = ESP_OK;
size_t _jpg_buf_len = 0;
uint8_t* _jpg_buf = NULL;
char* part_buf[64];
res = httpd_resp_set_type(req, _STREAM_CONTENT_TYPE);
if (res != ESP_OK) {
return res;
}
while (true) {
fb = esp_camera_fb_get();
if (!fb) {
Serial.println("Camera capture failed");
res = ESP_FAIL;
} else {
if (fb->width > 400) {
if (fb->format != PIXFORMAT_JPEG) {
bool jpeg_converted = frame2jpg(fb, 80, &_jpg_buf, &_jpg_buf_len);
esp_camera_fb_return(fb);
fb = NULL;
if (!jpeg_converted) {
Serial.println("JPEG compression failed");
res = ESP_FAIL;
}
} else {
_jpg_buf_len = fb->len;
_jpg_buf = fb->buf;
}
}
}
if (res == ESP_OK) {
size_t hlen = snprintf((char*)part_buf, 64, _STREAM_PART, _jpg_buf_len);
res = httpd_resp_send_chunk(req, (const char*)part_buf, hlen);
}
if (res == ESP_OK) {
res = httpd_resp_send_chunk(req, (const char*)_jpg_buf, _jpg_buf_len);
}
if (res == ESP_OK) {
res = httpd_resp_send_chunk(req, _STREAM_BOUNDARY, strlen(_STREAM_BOUNDARY));
}
if (fb) {
esp_camera_fb_return(fb);
fb = NULL;
_jpg_buf = NULL;
} else if (_jpg_buf) {
free(_jpg_buf);
_jpg_buf = NULL;
}
if (res != ESP_OK) {
break;
}
//Serial.printf("MJPG: %uB\n",(uint32_t)(_jpg_buf_len));
}
return res;
}
void startCameraServer() {
httpd_config_t config = HTTPD_DEFAULT_CONFIG();
config.server_port = 80;
httpd_uri_t index_uri = {
.uri = "/",
.method = HTTP_GET,
.handler = stream_handler,
.user_ctx = NULL
};
//Serial.printf("Starting web server on port: '%d'\n", config.server_port);
if (httpd_start(&stream_httpd, &config) == ESP_OK) {
httpd_register_uri_handler(stream_httpd, &index_uri);
}
}
void StartStreaming() {
WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0); //disable brownout detector
Serial.begin(115200);
//Serial.setDebugOutput(false);
camera_config_t config;
config.ledc_channel = LEDC_CHANNEL_0;
config.ledc_timer = LEDC_TIMER_0;
config.pin_d0 = Y2_GPIO_NUM;
config.pin_d1 = Y3_GPIO_NUM;
config.pin_d2 = Y4_GPIO_NUM;
config.pin_d3 = Y5_GPIO_NUM;
config.pin_d4 = Y6_GPIO_NUM;
config.pin_d5 = Y7_GPIO_NUM;
config.pin_d6 = Y8_GPIO_NUM;
config.pin_d7 = Y9_GPIO_NUM;
config.pin_xclk = XCLK_GPIO_NUM;
config.pin_pclk = PCLK_GPIO_NUM;
config.pin_vsync = VSYNC_GPIO_NUM;
config.pin_href = HREF_GPIO_NUM;
config.pin_sscb_sda = SIOD_GPIO_NUM;
config.pin_sscb_scl = SIOC_GPIO_NUM;
config.pin_pwdn = PWDN_GPIO_NUM;
config.pin_reset = RESET_GPIO_NUM;
config.xclk_freq_hz = 20000000;
config.pixel_format = PIXFORMAT_JPEG;
//FRAMESIZE_UXGA higher resolution with more latency
//FRAMESIZE_SVGA medium resolution with less latency
//FRAMESIZE_VGA quite the same resolution as SVGA with very low latency
if (psramFound()) {
config.frame_size = FRAMESIZE_VGA;
config.jpeg_quality = 10;
config.fb_count = 2;
} else {
config.frame_size = FRAMESIZE_UXGA;
config.jpeg_quality = 12;
config.fb_count = 1;
}
// Camera init
esp_err_t err = esp_camera_init(&config);
if (err != ESP_OK) {
Serial.printf("Camera init failed with error 0x%x", err);
return;
}
// Connect to Wi-Fi network with SSID and password
Serial.println("Setting AP");
// Remove the password parameter, if you want the AP (Access Point) to be open
WiFi.softAP(ssid, password);
IPAddress IP = WiFi.softAPIP();
Serial.println("STREAMok");
//Serial.println(IP);
// Start streaming web server
startCameraServer();
}
And finally this is the output from the serial monitor:
Thanks in advance