使用wifiManager通过Arduino Uno r3和ESP8266-01向ThingSpeak发送传感器信息

Question

我有一个项目，我有一个水位传感器连接到我的Arduino Uno r3。我有一个ESP8266-01模块连接到我的Arduino。使用AT命令我能够将传感器结果上传到ThinkSpeak。但是我希望能够登录其他wifi频道，所以我把wifiManager.h，ESP8266WiFi.h，DNSServer.h和ESP8266WebServer.h放在我的ESP8266上，一切正常。因为它无法连接，因为没有IP和密码，它在AP模式下打开，我从我的计算机连接到它并登录到它。我输入了我的IP地址和密码，然后点击SAVE并重新连接ESP。我现在正在尝试将传感器数据上传到thingSpeak，但我认为AT命令不再起作用，因为我得到错误espData未在此范围内声明。这是我的代码。

//这是我放入ESP8266的新代码，并使用GPIO 2将信息从传感器上传到thinkSpeak正如您所见，我使用wifiManager连接到wifi，然后通过GPIO 2端口读取由Arduino供电的传感器。

#include <FS.h>

#include <ESP8266WiFi.h>          //https://github.com/esp8266/Arduino

//needed for library
#include <DNSServer.h>
#include <ESP8266WebServer.h>
#include <WiFiManager.h>         //https://github.com/tzapu/WiFiManager
#include <ArduinoJson.h>

//NEW STUFF START

char apiKey[20]="";
WiFiClient client;

char defaultHost[100] = "api.thingspeak.com";  //Thing Speak IP address (sometime the web address causes issues with ESP's :/
    long itt = 500;
    long itt2 = 500;

const byte wifiResetPin = 13;
int interruptPinDebounce = 0;
long debouncing_time = 1000;
volatile unsigned long wifiResetLastMillis = 0;


bool shouldSaveConfig = false;

void saveConfigCallback () {
  Serial.println("Should save config");
  shouldSaveConfig = true;}

  void handleWifiReset(){
    if(millis()<wifiResetLastMillis){
      wifiResetLastMillis = millis();
    }
    if((millis() - wifiResetLastMillis)>= debouncing_time){
      Serial.println("Clearing WiFi data resetting");
      WiFiManager wifiManager;
      wifiManager.resetSettings();
      SPIFFS.format();
      ESP.reset();
      delay(1000);
    }
    wifiResetLastMillis = millis();
  }

void setup() {
  WiFiManager wifiManager;
    // put your setup code here, to run once:
    Serial.begin(115200);
    pinMode(wifiResetPin, INPUT_PULLUP);
    attachInterrupt(digitalPinToInterrupt(wifiResetPin), handleWifiReset,FALLING);

    //NEW STUFF START
    //clean FS, for testing
  //SPIFFS.format();

  //read configuration from FS json
  Serial.println("mounting FS...");

  if (SPIFFS.begin()) {
    Serial.println("mounted file system");
    if (SPIFFS.exists("/config.json")) {
      //file exists, reading and loading
      Serial.println("reading config file");
      File configFile = SPIFFS.open("/config.json", "r");
      if (configFile) {
        Serial.println("opened config file");
        size_t size = configFile.size();
        // Allocate a buffer to store contents of the file.
        std::unique_ptr<char[]> buf(new char[size]);

        configFile.readBytes(buf.get(), size);
        DynamicJsonBuffer jsonBuffer;
        JsonObject& json = jsonBuffer.parseObject(buf.get());
        json.printTo(Serial);
        if (json.success()) {
          Serial.println("\nparsed json");
          strcpy(defaultHost, json["defaultHost"]);
          strcpy(apiKey, json["apiKey"]);
        } else {
          Serial.println("failed to load json config");
        }
      }
    }
  } else {
    Serial.println("failed to mount FS");
  }
  WiFiManagerParameter customHostServer("defaultHost", "Host Server", defaultHost, 100);
  WiFiManagerParameter customAPIKey("apiKey", "ThingSpeakWriteAPI", apiKey, 20);
//END NEW STUFF
    //WiFiManager
    //Local intialization. Once its business is done, there is no need to keep it around
   //WiFiManager wifiManager;

    //NEW STUFF START 
    wifiManager.setSaveConfigCallback(saveConfigCallback);
    wifiManager.addParameter(&customHostServer);
    wifiManager.addParameter(&customAPIKey);
     //END NEW STUFF
    //reset saved settings
   //wifiManager.resetSettings();

    //set custom ip for portal
    //wifiManager.setAPStaticIPConfig(IPAddress(10,0,1,1), IPAddress(10,0,1,1), IPAddress(255,255,255,0));

    //fetches ssid and pass from eeprom and tries to connect
    //if it does not connect it starts an access point with the specified name
    //here  "AutoConnectAP"
    //and goes into a blocking loop awaiting configuration
    wifiManager.autoConnect("AutoConnectAP");
    Serial.println("Connected");
  //NEW STUFF START
  strcpy(defaultHost, customHostServer.getValue());
  strcpy(apiKey, customAPIKey.getValue());
  if (shouldSaveConfig) {
    Serial.println("saving config");
    DynamicJsonBuffer jsonBuffer;
    JsonObject& json = jsonBuffer.createObject();
    json["defaultHost"] = defaultHost;
    json["apiKey"] = apiKey;
    File configFile = SPIFFS.open("/config.json", "w");
    if (!configFile) {
      Serial.println("failed to open config file for writing");
    }

    json.printTo(Serial);
    json.printTo(configFile);
    configFile.close();
    //end save
  }
  Serial.println("local ip");
  Serial.println(WiFi.localIP());
  //END NEW STUFF
    //or use this for auto generated name ESP + ChipID
    //wifiManager.autoConnect();
pinMode(2,INPUT);
pinMode(1,INPUT);

    Serial.println("WriteApi");
    Serial.println(apiKey);


    //if you get here you have connected to the WiFi
    Serial.println("connected...yeey :)");
     //save the custom parameters to FS
     strcpy(defaultHost,customHostServer.getValue());
  strcpy(apiKey,customAPIKey.getValue());

}

//callback notifying us of the need to save config


void loop() {
  delay(5000);

String apiKey2 = apiKey;
char defaultHost[100] = "api.thingspeak.com";
  pinMode(2,INPUT);
  pinMode(1,INPUT);

  const int waterInPin = 2;  // Analog input pin that the potentiometer is attached to
    const int BatteryInPin = 1;  // Analog input pin that the potentiometer is attached to
    int waterSensorInValue;//reading our water lever sensor
int waterSensorOutValue;//conversion of water sensor value
int BatterySensorInValue;//reading our water lever sensor
int BatterySensorOutValue;//conversion of water sensor value
    // put your main code here, to run repeatedly:
    waterSensorInValue = analogRead(waterInPin);
   BatterySensorInValue = analogRead(BatteryInPin);
  waterSensorOutValue = map(waterSensorInValue,0,1024,0,225);
  BatterySensorOutValue = map(BatterySensorInValue,0,1024,0,225);
 Serial.println("WaterOutValue = ");
  Serial.println(waterSensorOutValue );
  Serial.println("WaterInValue = ");
  Serial.println(waterSensorInValue );
  Serial.println("BatteryOutValue = ");
  Serial.println(BatterySensorOutValue );
  Serial.println("BatteryInValue = ");
  Serial.println(BatterySensorInValue);
    delay(18000);
    itt = waterSensorInValue;
    itt2 = BatterySensorInValue;






    if (client.connect(defaultHost,80))
    { // "184.106.153.149" or api.thingspeak.com
        itt++;  //Replace with a sensor reading or something useful

        String postStr = apiKey;
        postStr +="&field1=";
        postStr += String(itt);
        postStr +="&field2=";
        postStr += String(itt2);
        postStr += "\r\n\r\n\r\n";

        client.print("POST /update HTTP/1.1\n");
        client.print("Host: api.thingspeak.com\n");
        client.print("Connection: close\n");
        client.print("X-THINGSPEAKAPIKEY: "+String (apiKey)+"\n");
        client.print("Content-Type: application/x-www-form-urlencoded\n");
        client.print("Content-Length: ");
        client.print(postStr.length());
        client.print("\n\n\n");
        client.print(postStr);

        Serial.println("% send to Thingspeak");
    }

    client.stop();

    Serial.println("Waiting…");

    delay(20000);
}

我将其他代码放在与传感器或互联网无关的Arduino板上但是上面的代码工作得很好，只要它连接到串口并在上传代码后直接运行。如果我从计算机上的串口拔出Arduino然后重新插入没有任何反应。我认为它应该继续运行上面的代码连接到互联网，读取传感器和发送信息到thingSpeak，但事实并非如此。任何想法为什么会这样。

我用新的代码替换旧的代码，据说将我的thingSpeak写api保存到SPIFFS。如果我擦除设置，然后上传闪存大小设置为512k（128k SPIFFS）FS安装，默认主机和Api写入密钥保存到SPIFF，然后ESP8266重新启动连接到互联网并转到thingSpeak并更新传感器读数。问题仍然是我想关闭ESP8266以节省能量，但是当我重新启动它时，只有（无效）循环运行，所以即使它连接到wifi，甚至可能甚至对于thingSpeak它也不会更新传感器输入。如何从SPIFFS获取信息api写入密钥到我的草图的（void）循环部分，以便在关闭后将传感器数据发送到thingSpeak。或者我没有连接到ThingSpeak。无论如何这是一个不同的问题，所以我将重新发布一个更具体的问题并标记这个答案。

Answer 1

这回答了很多关于使用ESP8266和Arduino uno连接到不同的wifi和密码并添加自定义参数的过程的问题。我仍然有一些问题，但会在一个单独的帖子中询问，希望有人可以帮助我。