【物联网】传感器+wifi传输+回复+显示

#include <Arduino.h>

#include <U8g2lib.h>

#include "DHT.h"

#include <ESP8266WiFi.h>

#include <WiFiClientSecure.h>

#ifdef U8X8_HAVE_HW_SPI

#include <SPI.h>

#endif

#ifdef U8X8_HAVE_HW_I2C

#include <Wire.h>

#endif

#define SCL 5

#define SDA 4

#define DHTPIN 13

#define DHTTYPE DHT11   // DHT 11

#ifndef STASSID

#define STASSID "******"

#define STAPSK  "******"

#endif

const char* ssid = STASSID;

const char* password = STAPSK;

const char* host = "192.168.31.203";

const int httpsPort = 5001;

U8G2_SSD1306_128X32_UNIVISION_1_SW_I2C u8g2(U8G2_R0, /* clock=*/ SCL, /* data=*/ SDA, /* reset=*/ U8X8_PIN_NONE);   // Adafruit Feather ESP8266/32u4 Boards + FeatherWing OLED

//U8G2_SSD1306_128X64_NONAME_F_SW_I2C u8g2(U8G2_R0, /* clock=*/ SCL, /* data=*/ SDA, /* reset=*/ U8X8_PIN_NONE);   // All Boards without Reset of the Display

DHT dht(DHTPIN, DHTTYPE);

void setup() {

  // put your setup code here, to run once:

  u8g2.begin();

  u8g2.enableUTF8Print();

  Serial.begin(115200);

  Serial.println(F("DHTxx test!"));

  dht.begin();

  Serial.print("connecting to ");

  Serial.println(ssid);

  WiFi.mode(WIFI_STA);

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {

    delay(500);

    Serial.print(".");

  }

  Serial.println("");

  Serial.println("WiFi connected");

  Serial.println("IP address: ");

  Serial.println(WiFi.localIP());

}

uint8_t m = 24;

void loop() {

  delay(2000);

  // Reading temperature or humidity takes about 250 milliseconds!

  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)

  float h = dht.readHumidity();

  // Read temperature as Celsius (the default)

  float t = dht.readTemperature();

  // Read temperature as Fahrenheit (isFahrenheit = true)

  float f = dht.readTemperature(true);

  // Check if any reads failed and exit early (to try again).

  if (isnan(h) || isnan(t) || isnan(f)) {

    Serial.println(F("Failed to read from DHT sensor!"));

    return;

  }

  // Compute heat index in Fahrenheit (the default)

  float hif = dht.computeHeatIndex(f, h);

  // Compute heat index in Celsius (isFahreheit = false)

  float hic = dht.computeHeatIndex(t, h, false);

  Serial.print(F("Humidity: "));

  Serial.print(h);

  Serial.print(F("%  Temperature: "));

  Serial.print(t);

  Serial.print(F("°C "));

  Serial.print(f);

  Serial.print(F("°F  Heat index: "));

  Serial.print(hic);

  Serial.print(F("°C "));

  Serial.print(hif);

  Serial.println(F("°F"));

  //u8g2.setFont(u8g2_font_unifont_t_chinese1);  // use chinese2 for all the glyphs of "你好世界"

  u8g2.setFont(u8g2_font_wqy16_t_gb2312b);

  //u8g2.setFont(u8g2_font_6x13_tn);

  u8g2.firstPage();

  do {

  u8g2.setFontDirection(0);

  u8g2.clearBuffer();

  u8g2.setCursor(10, 13);

  u8g2.print("-温度"+(String)t+"C" );

  u8g2.setCursor(10, 30);

  u8g2.print("-湿度"+(String)h+"%");    // Chinese "Hello World"

  u8g2.sendBuffer();

  //u8g2.drawStr(0,15,"Hello World!");

  }while(u8g2.nextPage());

  delay(1000);

  WiFiClient client;

  Serial.print("connecting to ");

  Serial.println(host);

  if (!client.connect(host, httpsPort)) {

    Serial.println("connection failed");

    return;

  }

  // Wait a few seconds between measurements.

  delay(1000);

  String url = "/";

  Serial.print("requesting URL: ");

  Serial.println(url);

  // 组拼HTTPS请求的Header

  String jsonStr = String("") +

                    "{\"Humidity\":"+h+","+

                    "\"Temperature\":"+t+"}";

  /*

  "{'datastreams':[{" +

            "'id':'" + dataId + "'" +

            ",'datapoints':[{" +

            "'value':" + data +

            "}]}]}";

            */

  Serial.println(jsonStr);

  String getStr = String("POST ") + url + " HTTP/1.1\r\n" +

               "Host: " + host + "\r\n" +

               "User-Agent: arduino\r\n" +

               "Connection: close\r\n";

  client.print(getStr);   // 发送Headers头

  client.print(String("") + "Content-Length:" + jsonStr.length() + "\r\n\r\n"); // 发送Header头-数据内容长度(注意:\r\n\r\n是结尾)

  client.print(jsonStr);  // 发送json数据

  Serial.println("request sent");

  Serial.println("==========");

  Serial.println("send was:");

  Serial.println(jsonStr);   // 打印发送的请求数据

  Serial.println("reply was:");

  String line = "";

  while (client.connected() || client.available())

{

  if (client.available())

  {

    line = client.readStringUntil('\n');

  }

}

  Serial.println(line);

  Serial.println("==========");

}