I updated my boards because I was getting errors, but now I am getting a NEW ERROR:
A fatal error occurred: Failed to connect to ESP32: No serial data received.
For troubleshooting steps visit: Troubleshooting - ESP32 - — esptool.py latest documentation
the selected serial port For troubleshooting steps visit: Troubleshooting - ESP32 - — esptool.py latest documentation
does not exist or your board is not connected
I only get this error with the ESP32-CAM and not the ESP32-WROOM.
I have never seen this error before. How do I fix it?
(Also, I am using an ESP32-CAM-MB to upload the code to COM 3)
(Another thing, if I use the older version, neither boards will upload and the error is, "A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header.")
Code:
//Libraries
#include "esp_wifi.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"
#include "soc/rtc_cntl_reg.h"
#include "esp_http_server.h"
#include <esp_now.h>
// WiFi Password
const char* ssid1 = "VinnieWiFi";
const char* password1 = "Qwerty123!";
//ESP32-WROOM MAC ADDRESS
uint8_t broadcastAddress[] = {0xE0, 0x5A, 0x1B, 0xAC, 0x5A, 0xF8};
#define PART_BOUNDARY "123456789000000000000987654321"
#define 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
//ESP NOW
typedef struct struct_message {
int b;
} struct_message;
struct_message myData;
esp_now_peer_info_t peerInfo;
void OnDataSent(const uint8_t *mac_addr, esp_now_send_status_t status) {
Serial.print("\r\nLast Packet Send Status:\t");
Serial.println(status == ESP_NOW_SEND_SUCCESS ? "Delivery Success" : "Delivery Fail");
}
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 camera_httpd = NULL;
httpd_handle_t stream_httpd = NULL;
static const char PROGMEM INDEX_HTML[] = R"rawliteral(
<html>
<head>
<title>Vinnie</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body { font-family: Arial; text-align: center; margin:0px auto; padding-top: 30px;}
table { margin-left: auto; margin-right: auto; }
td { padding: 8 px; }
.button {
background-color: #842593;
border: none;
color: purple;
padding: 10px 20px;
text-align: center;
text-decoration: none;
display: inline-block;
font-size: 18px;
margin: 6px 3px;
cursor: pointer;
-webkit-touch-callout: none;
-webkit-user-select: none;
-khtml-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
-webkit-tap-highlight-color: rgba(0,0,0,0);
}
img { width: auto ;
max-width: 100% ;
height: auto ;
}
</style>
</head>
<body>
<h1>Walking Robot</h1>
<img src="" id="photo" >
<table>
<tr><td colspan="3" align="center"><button class="button" onmousedown="toggleCheckbox('forward');" ontouchstart="toggleCheckbox('forward');" onmouseup="toggleCheckbox('stop');" ontouchend="toggleCheckbox('stop');">Forward</button></td></tr>
<tr><td align="center"><button class="button" onmousedown="toggleCheckbox('left');" ontouchstart="toggleCheckbox('left');" onmouseup="toggleCheckbox('stop');" ontouchend="toggleCheckbox('stop');">Left</button></td><td align="center"><button class="button" onmousedown="toggleCheckbox('stop');" ontouchstart="toggleCheckbox('stop');">Stop</button></td><td align="center"><button class="button" onmousedown="toggleCheckbox('right');" ontouchstart="toggleCheckbox('right');" onmouseup="toggleCheckbox('stop');" ontouchend="toggleCheckbox('stop');">Right</button></td></tr>
<tr><td colspan="3" align="center"><button class="button" onmousedown="toggleCheckbox('backward');" ontouchstart="toggleCheckbox('backward');" onmouseup="toggleCheckbox('stop');" ontouchend="toggleCheckbox('stop');">Backward</button></td></tr>
</table>
</head>
<body>
<br>
<br>
<section class="main">
<figure>
<div id="stream-container" class="image-container">
<div class="close" id="close-stream">×</div>
<img id="stream" src="" class="rotate90">
</div>
</figure>
<br>
<br>
<section id="buttons">
<div id="controls" class="control-container">
<table>
<tr><td align="center"><button class="button button6" id="get-still">Image</button></td><td align="center"><button id="toggle-stream">Start</button></td><td></td></tr>
<tr><td></td><td align="center"><button class="button button2" id="forward" onclick="fetch(document.location.origin+'/control?var=car&val=1');">FORWARD</button></td><td></td></tr>
<tr><td align="center"><button class="button button2" id="turnleft" onclick="fetch(document.location.origin+'/control?var=car&val=2');">LEFT</button></td><td align="center"></td><td align="center"><button class="button button2" id="turnright" onclick="fetch(document.location.origin+'/control?var=car&val=4');">RIGHT</button></td></tr>
<tr><td></td><td align="center"><button class="button button2" id="backward" onclick="fetch(document.location.origin+'/control?var=car&val=5');">REVERSE</button></td><td></td></tr>
<tr><td></td><td align="center"><button class="button button4" id="flash" onclick="fetch(document.location.origin+'/control?var=flash&val=1');">LIGHT ON</button></td><td></td></tr>
<tr><td></td><td align="center"><button class="button button4" id="flashoff" onclick="fetch(document.location.origin+'/control?var=flashoff&val=0');">LIGHT OFF</button></td><td></td></tr>
</table>
</div>
<br>
<div id="sliders" class="slider-container">
<table>
<tr><td>Vid Quality:</td><td align="center" colspan="2"><input type="range" id="quality" min="10" max="63" value="10" onchange="try{fetch(document.location.origin+'/control?var=quality&val='+this.value);}catch(e){}"></td></tr>
<tr><td>Vid Size:</td><td align="center" colspan="2"><input type="range" id="framesize" min="0" max="6" value="5" onchange="try{fetch(document.location.origin+'/control?var=framesize&val='+this.value);}catch(e){}"></td></tr>
</table>
</div>
</section>
</section>
<script>
function toggleCheckbox(x) {
var xhr = new XMLHttpRequest();
xhr.open("GET", "/action?go=" + x, true);
xhr.send();
}
window.onload = document.getElementById("photo").src = window.location.href.slice(0, -1) + ":81/stream";
</script>
</body>
</html>
)rawliteral";
static esp_err_t index_handler(httpd_req_t *req){
httpd_resp_set_type(req, "text/html");
return httpd_resp_send(req, (const char *)INDEX_HTML, strlen(INDEX_HTML));
}
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;
}
static esp_err_t cmd_handler(httpd_req_t *req){
char* buf;
size_t buf_len;
char variable[32] = {0,};
buf_len = httpd_req_get_url_query_len(req) + 1;
if (buf_len > 1) {
buf = (char*)malloc(buf_len);
if(!buf){
httpd_resp_send_500(req);
return ESP_FAIL;
}
if (httpd_req_get_url_query_str(req, buf, buf_len) == ESP_OK) {
if (httpd_query_key_value(buf, "go", variable, sizeof(variable)) == ESP_OK) {
} else {
free(buf);
httpd_resp_send_404(req);
return ESP_FAIL;
}
} else {
free(buf);
httpd_resp_send_404(req);
return ESP_FAIL;
}
free(buf);
} else {
httpd_resp_send_404(req);
return ESP_FAIL;
}
sensor_t * s = esp_camera_sensor_get();
int res = 0;
if(!strcmp(variable, "forward")) {
Serial.println("Forward");
// Set values to send
myData.b =(1);
// Send message via ESP-NOW
esp_err_t result = esp_now_send(broadcastAddress, (uint8_t *) &myData, sizeof(myData));
if (result == ESP_OK) {
Serial.println("Sent with success");
}
else {
Serial.println("Error sending the data");
}
}
else if(!strcmp(variable, "left")) {
Serial.println("Left");
// Set values to send
myData.b = (2);
// Send message via ESP-NOW
esp_err_t result = esp_now_send(broadcastAddress, (uint8_t *) &myData, sizeof(myData));
if (result == ESP_OK) {
Serial.println("Sent with success");
}
else {
Serial.println("Error sending the data");
}
}
else if(!strcmp(variable, "right")) {
Serial.println("Right");
// Set values to send
myData.b = (3);
// Send message via ESP-NOW
esp_err_t result = esp_now_send(broadcastAddress, (uint8_t *) &myData, sizeof(myData));
if (result == ESP_OK) {
Serial.println("Sent with success");
}
else {
Serial.println("Error sending the data");
}
}
else if(!strcmp(variable, "backward")) {
Serial.println("Backward");
// Set values to send
myData.b = (4);
// Send message via ESP-NOW
esp_err_t result = esp_now_send(broadcastAddress, (uint8_t *) &myData, sizeof(myData));
if (result == ESP_OK) {
Serial.println("Sent with success");
}
else {
Serial.println("Error sending the data");
}
}
else if(!strcmp(variable, "stop")) {
Serial.println("Stop");
// Set values to send
myData.b = (5);
// Send message via ESP-NOW
esp_err_t result = esp_now_send(broadcastAddress, (uint8_t *) &myData, sizeof(myData));
if (result == ESP_OK) {
Serial.println("Sent with success");
}
else {
Serial.println("Error sending the data");
}
}
else {
res = -1;
}
if(res){
return httpd_resp_send_500(req);
}
httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");
return httpd_resp_send(req, NULL, 0);
}
void startCameraServer(){
httpd_config_t config = HTTPD_DEFAULT_CONFIG();
config.server_port = 80;
httpd_uri_t index_uri = {
.uri = "/",
.method = HTTP_GET,
.handler = index_handler,
.user_ctx = NULL
};
httpd_uri_t cmd_uri = {
.uri = "/action",
.method = HTTP_GET,
.handler = cmd_handler,
.user_ctx = NULL
};
httpd_uri_t stream_uri = {
.uri = "/stream",
.method = HTTP_GET,
.handler = stream_handler,
.user_ctx = NULL
};
if (httpd_start(&camera_httpd, &config) == ESP_OK) {
httpd_register_uri_handler(camera_httpd, &index_uri);
httpd_register_uri_handler(camera_httpd, &cmd_uri);
}
config.server_port += 1;
config.ctrl_port += 1;
if (httpd_start(&stream_httpd, &config) == ESP_OK) {
httpd_register_uri_handler(stream_httpd, &stream_uri);
}
}
void setup() {
WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0); //disable brownout detector
Serial.begin(115200);
Serial.setDebugOutput(false);
// Set device as a Wi-Fi Station
WiFi.mode(WIFI_STA);
// Init ESP-NOW
if (esp_now_init() != ESP_OK) {
Serial.println("Error initializing ESP-NOW");
return;
}
// Once ESPNow is successfully Init, we will register for Send CB to
// get the status of Trasnmitted packet
esp_now_register_send_cb(OnDataSent);
// Register peer
memcpy(peerInfo.peer_addr, broadcastAddress, 6);
peerInfo.channel = 0;
peerInfo.encrypt = false;
// Add peer
if (esp_now_add_peer(&peerInfo) != ESP_OK){
Serial.println("Failed to add peer");
return;
}
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;
if(psramFound()){
config.frame_size = FRAMESIZE_VGA;
config.jpeg_quality = 10;
config.fb_count = 2;
} else {
config.frame_size = FRAMESIZE_SVGA;
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;
}
// Wi-Fi connection
WiFi.softAP(ssid1, password1);
IPAddress myIP = WiFi.softAPIP();
Serial.print("AP IP address: ");
Serial.println(myIP);
// Start streaming web server
startCameraServer();
}
void loop() {
}
