ESP32Cam mit PCA9685 (Webserver)

**crusico** · 31.12.2021, 13:05

Hallo,

ich möchte gern ein ESP32CAM mit einen PCA9685 Board verkabeln und über den Browser den Livestream sehen + 12 Servos (über den Browser) steuern.

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In Netz habe ich ein Code gefunden mit 1 Servos direkt an ESP32Cam ansteuern, den habe ich etwas moduliert!
Es gibt noch Probleme mit der Kommunikation zwischen
ESP32CAM und PCA9685 Board, die Silderwerte werden nicht angenommen vom Servo HCPCA9685.Servo(3, valueString.toInt());
DEr Servo 3 bleibt immer in einer Position und verändert sich nicht.

Hier der Code:

Code:

#include <WiFi.h>
#include "HCPCA9685.h"
#include <Wire.h>

#define I2C_SDA 1
#define I2C_SCL 3
 
//unsigned int Pos;

/* Create an instance of the library */
HCPCA9685 HCPCA9685(0x40);

// Replace with your network credentials
const char* ssid = "xxx";
const char* password = "xxx";

// Set web server port number to 80
WiFiServer server(80);

// Variable to store the HTTP request
String header;

// Decode HTTP GET value
String valueString = String(5);
int pos1 = 0;
int pos2 = 0;

// Current time
unsigned long currentTime = millis();
// Previous time
unsigned long previousTime = 0; 
// Define timeout time in milliseconds (example: 2000ms = 2s)
const long timeoutTime = 2000;

void setup() 
{
  Serial.begin(115200);
  Wire.begin(I2C_SDA,I2C_SCL);
  
  /* Initialise the library and set it to 'servo mode' */ 
  HCPCA9685.Init(SERVO_MODE);

  /* Wake the device up */
  HCPCA9685.Sleep(false);
}

// Connect to Wi-Fi network with SSID and password
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  // Print local IP address and start web server
  Serial.println("");
  Serial.println("WiFi connected.");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
  server.begin();
void loop() 
{
 
 WiFiClient client = server.available();   // Listen for incoming clients

  if (client) {                             // If a new client connects,
    currentTime = millis();
    previousTime = currentTime;
    Serial.println("New Client.");          // print a message out in the serial port
    String currentLine = "";                // make a String to hold incoming data from the client
    while (client.connected() && currentTime - previousTime <= timeoutTime) { // loop while the client's connected
      currentTime = millis();
      if (client.available()) {             // if there's bytes to read from the client,
        char c = client.read();             // read a byte, then
        Serial.write(c);                    // print it out the serial monitor
        header += c;
        if (c == '\n') {                    // if the byte is a newline character
          // if the current line is blank, you got two newline characters in a row.
          // that's the end of the client HTTP request, so send a response:
          if (currentLine.length() == 0) {
            // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
            // and a content-type so the client knows what's coming, then a blank line:
            client.println("HTTP/1.1 200 OK");
            client.println("Content-type:text/html");
            client.println("Connection: close");
            client.println();

            // Display the HTML web page
            client.println("<!DOCTYPE html><html>");
            client.println("<head><meta name="viewport" content="width=device-width, initial-scale=1">");
            client.println("<link rel="icon" href="data:,">");
            // CSS to style the on/off buttons 
            // Feel free to change the background-color and font-size attributes to fit your preferences
            client.println("<style>body { text-align: center; font-family: "Trebuchet MS", Arial; margin-left:auto; margin-right:auto;}");
            client.println(".slider { width: 300px; }</style>");
            client.println("<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>");
                     
            // Web Page
            client.println("</head><body><h1>ESP32 with Servo</h1>");
            client.println("<p>Position: <span id="servoPos"></span></p>");          
            client.println("<input type="range" min="0" max="180" class="slider" id="servoSlider" onchange="servo(this.value)" value=""+valueString+""/>");
            
            client.println("<script>var slider = document.getElementById("servoSlider");");
            client.println("var servoP = document.getElementById("servoPos"); servoP.innerHTML = slider.value;");
            client.println("slider.oninput = function() { slider.value = this.value; servoP.innerHTML = this.value; }");
            client.println("$.ajaxSetup({timeout:1000}); function servo(pos) { ");
            client.println("$.get("/?value=" + pos + "&"); {Connection: close};}</script>");
           
            client.println("</body></html>");     
            
            //GET /?value=180& HTTP/1.1
            if(header.indexOf("GET /?value=")>=0) {
              pos1 = header.indexOf('=');
              pos2 = header.indexOf('&');
              valueString = header.substring(pos1+1, pos2);
              
              //Rotate the servo
              HCPCA9685.Servo(3, valueString.toInt());
              Serial.println(valueString); 
            }         
            // The HTTP response ends with another blank line
            client.println();
            // Break out of the while loop
            break;
          } else { // if you got a newline, then clear currentLine
            currentLine = "";
          }
        } else if (c != '\r') {  // if you got anything else but a carriage return character,
          currentLine += c;      // add it to the end of the currentLine
        }
      }
    }
    // Clear the header variable
    header = "";
    // Close the connection
    client.stop();
    Serial.println("Client disconnected.");
    Serial.println("");
  }
  
}

Gibt es evtl. jemand, der so in etwa schon mal umgesetzt hat und mir helfen kann?