ESP32Servo Library Error

Using Arduino Programming Questions
1

I'm trying to build a simple motion tracking turret using 3 servos and an ESP32Cam. Im also using an Arduino IDE connected to the servos and camera.

I receive this error message when I compile the code:

"Arduino: 1.8.15 (Windows 10), Board: "AI Thinker ESP32-CAM, 240MHz (WiFi/BT), QIO, 80MHz"
esp32:10:1: error: 'ESP32Servo' does not name a type

 ESP32Servo panServo(panPin);

 ^

esp32:11:1: error: 'ESP32Servo' does not name a type

 ESP32Servo tiltServo(tiltPin);

 ^

C:\Users\emman\Documents\Arduino\esp32\esp32.ino: In function 'void setup()':

esp32:23:3: error: 'panServo' was not declared in this scope

   panServo.attach(panPin);

   ^

esp32:24:3: error: 'tiltServo' was not declared in this scope

   tiltServo.attach(tiltPin);

   ^

C:\Users\emman\Documents\Arduino\esp32\esp32.ino: In function 'void loop()':

esp32:45:9: error: 'motionY' was not declared in this scope

     if (motionY > 100) {

         ^

esp32:46:7: error: 'panServo' was not declared in this scope

       panServo.write(panPos);

       ^

esp32:48:7: error: 'panServo' was not declared in this scope

       panServo.write(0);

       ^

esp32:52:5: error: 'tiltServo' was not declared in this scope

     tiltServo.write(tiltPos);

     ^

C:\Users\emman\Documents\Arduino\esp32\esp32.ino: In function 'bool detectMotion()':

esp32:81:76: error: 'esp_camera_fb_to_grayscale' was not declared in this scope

   esp_camera_fb_to_grayscale(fb->buf, grayscaleImage, fb->width, fb->height);

                                                                            ^

C:\Users\emman\Documents\Arduino\esp32\esp32.ino: In function 'void stopServos()':

esp32:116:3: error: 'panServo' was not declared in this scope

   panServo.write(0);

   ^

esp32:117:3: error: 'tiltServo' was not declared in this scope

   tiltServo.write(0);

   ^

exit status 1

'ESP32Servo' does not name a type



This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
"

There is an error with the ESP32Servo library. I've reinstalled it and checked if the version is compatible. It's v0.13 and my Arduino IDE is version v1.8.15.

Here is my code:

#include <Wire.h>
#include "esp_camera.h"
#include <ESP32Servo.h>

// Define the servo pins
const int panPin = 2;
const int tiltPin = 3;

// Create the servo objects
ESP32Servo panServo(panPin);
ESP32Servo tiltServo(tiltPin);

// Initialize the servos
void setup() {
  Serial.begin(9600);
  Wire.begin();

  // Set the pins as outputs
  pinMode(panPin, OUTPUT);
  pinMode(tiltPin, OUTPUT);

  // Attach the servos
  panServo.attach(panPin);
  tiltServo.attach(tiltPin);

  // Initialize camera
  camera_config_t config;
  esp_err_t err = esp_camera_init(&config);
  if (err != ESP_OK) {
    Serial.printf("Camera init failed with error 0x%x", err);
    while (true);
  }
}

// The main loop
void loop() {
  // Check if there is any motion
  if (detectMotion()) {
    // Move servos so that the camera is centered on the movement
    int panPos = 90;
    int tiltPos = 90;

    // Determine the direction of motion
    // If the motionY is greater than a threshold, then the pan servo should be adjusted to the right
    if (motionY > 100) {
      panServo.write(panPos);
    } else {
      panServo.write(0);
    }

    // Center the servos
    tiltServo.write(tiltPos);

    // Pull the trigger
    //servo3.write(90);
    delay(100);
    //servo3.write(0);
  } else {
    // Stop the servos
    stopServos();
  }

  // Delay for a few milliseconds
  delay(100);
}

// Function to detect motion
bool detectMotion() {
  // Capture an image
  camera_fb_t *fb = esp_camera_fb_get();
  if (!fb) {
    Serial.println("Camera capture failed");
    return false;
  }

  // Delay for a few milliseconds to let the camera stabilize
  delay(10);

  // Convert the image data to grayscale
  uint8_t *grayscaleImage = new uint8_t[fb->width * fb->height];
  esp_camera_fb_to_grayscale(fb->buf, grayscaleImage, fb->width, fb->height);

  // Find the center of the image
  int centerX = fb->width / 2;
  int centerY = fb->height / 2;

  // Determine the direction of motion
  int motionY = 0;
  for (int i = 0; i < fb->width; i++) {
    motionY += grayscaleImage[centerX * fb->height + i];
  }

  // Free the grayscale image
  delete[] grayscaleImage;

  esp_camera_fb_return(fb);

  // If the motionY is greater than a threshold, then there is motion
  return motionY > 100;
}

// Adjust servos so that the camera is centered on the movement
void adjustServos() {
  // Check if the trigger should be pulled
  //if (motionDetected) {
    // Pull the trigger
    servo3.write(90);
  //} else {
    // Release the trigger
    servo3.write(0);
  //}
}

// Stop the servos
void stopServos() {
  panServo.write(0);
  tiltServo.write(0);

Is there anything I am doing wrong?
Any tips or help is much appreciated, thank you!

2

Looking into the libs source..
There is no ESPServo object, it's just Servo take the ESP off..

good luck.. ~q

1 Like
3

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.