ESP32 上网络服务器循环的看门狗计时器错误

Question

我正在为巡线机器人使用 ESP32 CAM 模块。而且，我正在尝试创建一个带有 3 个提交按钮的网络服务器。但是现在，我只是观察串行端口上的输入，并且只使用一个提交栏。这些按钮指定电机的 PWM 值和一些常数。这是我的代码：

#include "Arduino.h"
#include "WiFi.h"
#include "AsyncTCP.h"
#include "ESPAsyncWebServer.h"


AsyncWebServer server(80);

// Internet ID and Password
const char* ssid = "TURKSAT-KABLONET-BC75-2.4G";
const char* password = "d942d3db";

const char* PARAM_INPUT_1 = "input1";
const char* PARAM_INPUT_2 = "input2";
const char* PARAM_INPUT_3 = "input3";

// HTML web page to handle 3 input fields (input1, input2, input3)
const char index_html[] PROGMEM = R"rawliteral( // Webserver design part
<!DOCTYPE HTML><html><head>
  <title>ESP Input Form</title>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  </head><body>
  <form action="/get">
    input1: <input type="text" name="input1">
    <input type="submit" value="Submit"> // Submit bar 1
  </form><br>
  <form action="/get">
    input2: <input type="text" name="input2">
    <input type="submit" value="Submit"> // Submit bar 2
  </form><br>
  <form action="/get">
    input3: <input type="text" name="input3">
    <input type="submit" value="Submit"> // Submit bar 3
  </form>
</body></html>)rawliteral";

void notFound(AsyncWebServerRequest *request) {
  request->send(404, "text/plain", "Not found");
}
String inputMessage;
void Setup_to_Loop(String inputMessage); // Prototype of function

void Setup_to_Loop(String inputMessage){ // Function to observe the variable
  while(1){
    Serial.print(inputMessage); // Observe submit bar on serial port of Arduino
    delay(200);
  }
}

void setup() {
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  if (WiFi.waitForConnectResult() != WL_CONNECTED) {
    Serial.println("WiFi Failed!");
    return;
  }
  Serial.println();
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP());

  // Send web page with input fields to client
  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request){
    request->send_P(200, "text/html", index_html);
  });
// Send a GET request to <ESP_IP>/get?input1=<inputMessage>
  server.on("/get", HTTP_GET, [] (AsyncWebServerRequest *request) {
    String inputMessage;
    String inputParam;
    // GET input1 value on <ESP_IP>/get?input1=<inputMessage>
    if (request->hasParam(PARAM_INPUT_1)) { // Check for which bar is filled ( bar 1 )
      inputMessage = request->getParam(PARAM_INPUT_1)->value();
      inputParam = PARAM_INPUT_1;
    }
    // GET input2 value on <ESP_IP>/get?input2=<inputMessage>
    else if (request->hasParam(PARAM_INPUT_2)) { // Check for which bar is filled ( bar 2 )
      inputMessage = request->getParam(PARAM_INPUT_2)->value();
      inputParam = PARAM_INPUT_2;
    }
    // GET input3 value on <ESP_IP>/get?input3=<inputMessage>
    else if (request->hasParam(PARAM_INPUT_3)) { // Check for which bar is filled ( bar 3 )
      inputMessage = request->getParam(PARAM_INPUT_3)->value();
      inputParam = PARAM_INPUT_3;
    }
    else {
      inputMessage = "No message sent";
      inputParam = "none";
    }
    Serial.println(inputMessage);
    request->send(200, "text/html", "HTTP GET request sent to your ESP on input field ("
                                     + inputParam + ") with value: " + inputMessage +
                                     "<br><a href=\"/\">Return to Home Page</a>");  // Send the values that were written on submit bars
    Setup_to_Loop(inputMessage);  // Call of function
  });
  server.onNotFound(notFound);
  server.begin();
}
void loop() {
}

收到的错误是：

(20281) task_wdt: Task watchdog got triggered. The following tasks did not reset the watchdog in time:
E (20281) task_wdt:  - async_tcp (CPU 0/1)
E (20281) task_wdt: Tasks currently running:
E (20281) task_wdt: CPU 0: IDLE0
E (20281) task_wdt: CPU 1: loopTask
E (20281) task_wdt: Aborting.
abort() was called at PC 0x400e5def on core 0

Backtrace: 0x4008efe0:0x3ffbe160 0x4008f211:0x3ffbe180 0x400e5def:0x3ffbe1a0 0x40081a15:0x3ffbe1c0 0x40147e4f:0x3ffbc170 0x400e1c53:0x3ffbc190 0x4008ce7d:0x3ffbc1b0 0x4008af7d:0x3ffbc1d0

Rebooting...

Answer 1

您的函数 Setup_to_Loop() 调用 delay()。它是从 "/get" 请求的处理程序中调用的。

你不可以这样做的ESPAsyncWebServer documentation explicitly states:

You can not use yield or delay or any function that uses them inside the callbacks

我不太清楚你想用这个函数做什么以及为什么它使用无限循环，但你需要重写它。它应该 return 及时而不是调用 delay().

ESP32 上网络服务器循环的看门狗计时器错误

Watchdog timer errors for loops for webserver on ESP32

c++

webserver

watchdog

esp32