hardware - 奇怪的 Wemos D1 迷你行为

Question

我的 Wemos D1 mini 有问题。有人可以尝试一下代码并告诉我它是否有效吗？

应该发生的是它尝试连接到指定的网络，然后询问时间。但是，如果网络不可用，则打开接入点。在循环中每 2 秒进行一次检查：在 ap 模式下进行异步扫描以重新连接，在 sta 模式下检查是否仍处于连接状态。

有多个问题：

• 打开AP时，MDNS.update(); 功能需要 50 毫秒才能完成（在 WIFI_STA 模式下需要 < 1ms
• 同样在 AP 模式下，ESP 进入 if (WiFi.status() == WL_CONNECTED) {...} 尽管它返回 false。当我用 if (false) {...} 替换它时，它崩溃了。（这发生在 getRealTime() 函数中）

我的电路板可能坏了，因为 USB-Power 不再工作，5V 输入也不工作。（可能是我从支架上拿出来的时候把它毁了，没有先断开电源）

帮助将不胜感激，谢谢！

#include <ESP8266WiFi.h>
#include <ESP8266mDNS.h>
#include <NTPClient.h>
#include <TimeLib.h>
#include <Timezone_Generic.h>
#include <arduino-timer.h>

IPAddress ip(192, 168, 0, 2);
IPAddress gateway(192, 168, 0, 1);
IPAddress subnet(255, 255, 255, 0);

WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, "ch.pool.ntp.org", 0);

TimeChangeRule cet = {"CET", Last, Sun, Oct, 2, 60};
TimeChangeRule cest = {"CEST", Last, Sun, Mar, 3, 120};
Timezone europeanTime(cet, cest);

const char* DEVICENAME = "ESP8266";
const char* AP_PASS = "Password";

String WIFI_SSID = "";
String WIFI_PASS = "";
String TEMP_SSID;
String TEMP_PASS;
String wifiMode;
bool scanWifi;
bool specificScan = false;
uint32_t t;
auto timer = timer_create_default();


void setup() {
  Serial.begin(115200);
  Serial.println();

  wifiManager("boot");
  timeManager();
}

void loop() {
  t = millis();

  Serial.println(t);

  if (t % 2000 == 0) {
    wifiManager("check");
    if (scanWifi) {
      wifiManager("scan");
    }
  }

  MDNS.update();
}


void wifiManager(String m) {
  if (m == "boot") {
    Serial.println("WiFi Boot");

    WiFi.softAPdisconnect(true);
    WiFi.disconnect();

    Serial.println("SSID: " + String(WIFI_SSID));

    if (WIFI_SSID != "" && WIFI_PASS != "") {
      // Synchronous Scan
      int networks = WiFi.scanNetworks();
      bool success;
      
      for (int i = 0; i < networks; i++) {
        if (WiFi.SSID(i) == WIFI_SSID) {
          success = wifi(WIFI_SSID, WIFI_PASS);
          break;
        }
      }
      if (!success) {
        softAp();
      }
    }
  }
  // Check connection
  else if (m == "check") {
    int num = WiFi.scanComplete();
    
    if (WiFi.status() == WL_CONNECTED && wifiMode != "wlan") {
      // Connect to wifi
      if (!wifi(WIFI_SSID, WIFI_PASS)) {
        softAp();
      }
    }
    if (WiFi.status() != WL_CONNECTED && wifiMode != "ap") {
      // Open AP
      softAp();
    }
    // Scan network if no stations are connected
    if (wifiMode == "ap" && WiFi.softAPgetStationNum() == 0) {
      scanWifi = true;

      if (num > 0) {
        wifiManager("connect", WIFI_SSID, WIFI_PASS, num);
      }
    }
    if (WiFi.softAPgetStationNum() > 0) {
      scanWifi = false;
    }
    if (num > 0 && specificScan) { // Manual connection
      wifiManager("connect", TEMP_SSID, TEMP_PASS, num);
      specificScan = false;
    }
  }
  else if (m == "scan") {
    // Asynchronous scan
    if ((WiFi.scanComplete() > 0 || WiFi.scanComplete() == -2)){
      Serial.println("Scanning Network...");
      WiFi.scanNetworks(true);
      delay(1);
    }
  }
}

// Check scan results
void wifiManager(String m, String ssid, String pass, int num) {
  if (m == "connect") { // Connect to WiFi
    for (int i = 0; i < num; i++) {
      Serial.println(WiFi.SSID(i));
      if (WiFi.SSID(i) == ssid) {
        scanWifi = false;
        if (!wifi(ssid, pass)) {
          softAp();
        }
      }
    }
  }
}

bool wifi(String ssid, String pass) {
  Serial.println("Connecting to " + String(ssid));
  
  WiFi.softAPdisconnect(true);
  WiFi.mode(WIFI_STA);

  int counter = 0;
  int maxCount = 100;

  WiFi.begin(ssid, pass);
  do {
    delay(250);
    counter++;
    Serial.println("#" + String(counter));

    if (counter == maxCount) {
      return false;
    }
  } while (WiFi.status() != WL_CONNECTED);

  wifiMode = "wlan";

  MDNS.begin(DEVICENAME);
  MDNS.addService("http", "tcp", 80);

  return true;
}

void softAp() {
  // https://arduino-esp8266.readthedocs.io/en/latest/esp8266wifi/soft-access-point-class.html

  Serial.println("Opening AP");
  
  WiFi.disconnect();
  WiFi.scanDelete();
  WiFi.mode(WIFI_AP);

  // Open AP
  WiFi.softAPConfig(ip, gateway, subnet);
  WiFi.softAP(DEVICENAME, AP_PASS);

  wifiMode = "ap";

  MDNS.begin(DEVICENAME);
  MDNS.addService("http", "tcp", 80);
}

void timeManager() {
  timeClient.begin();

  timer.every(3600000, getRealTime);
  timer.in(0, getRealTime);
}

bool getRealTime(void *) {
  Serial.println("Time update");
  
  time_t updatedTime;

  if (WiFi.status() == WL_CONNECTED) {
    timeClient.update();
    updatedTime = timeClient.getEpochTime();

    Serial.println("Unix Timestamp: " + String(updatedTime));

    for (int i = 0; i < 5; i++) {
      if (updatedTime < 1000000000) { // timeClient returned wrong value
        Serial.println("Wrong time " + String(i));
        delay(500);
        timeClient.update();
        updatedTime = timeClient.getEpochTime();

        if (i == 4) {
          return true;
        }
      }
      else {
        break;
      }
    }

    Serial.println("Difference: " + String(abs(now() - timeClient.getEpochTime())));
    
    // Set updated time
    setTime(updatedTime);

  }
  else {
    if (timeStatus() == timeSet) {
      setTime(now());
    }
    else {
      setTime(0);
    }
  }
}


int getLocalTime() {
  String currentTime;
  
  time_t utc = now();
  time_t local = europeanTime.toLocal(utc);

  int hour_local = hour(local);
  int minute_local = minute(local);

  currentTime = String(hour_local);
  if (hour_local < 10) {
    currentTime = "0" + String(hour_local);
  }
  if (minute_local < 10) {
    currentTime += "0" + String(minute_local);
  }
  else {
    currentTime += String(minute_local);
  }

  return currentTime.toInt();
}

标签： hardwareesp8266arduino-esp8266