WeMos (c3) Home IoT Server

いよいよWiFiManagerを組み込み、理想のIoT-Cloud-Mobile Study Kit (IoT実験キット)の形ができた。

今回の実験はWeMosにhttpサーバを立ち上げて、ブラウザーから接続を待機；接続するとBMP280センサー情報を返送する。

つまり、スマートフォンまたはPCから直接接続して利用する。この場合ローカル環境の利用に限られ、出かける時でも利用するため、クラウド（例えばTinyWebDB API）が必要だ。

WiFiManagerを組み込みだ、Home IoT Server。

#include <Wire.h>

#include <Adafruit_BMP280.h>

#include <Adafruit_GFX.h>

#include <Adafruit_SSD1306.h>

#define OLED_RESET 0 // GPIO0

Adafruit_SSD1306 OLED(OLED_RESET);

#define BMP_SCK 13

#define BMP_MISO 12

#define BMP_MOSI 11

#define BMP_CS 10

Adafruit_BMP280 bmp; // I2C

//Adafruit_BMP280 bmp(BMP_CS); // hardware SPI

//Adafruit_BMP280 bmp(BMP_CS, BMP_MOSI, BMP_MISO, BMP_SCK);

#include <ESP8266WiFi.h>

#include <DNSServer.h>

#include <ESP8266WebServer.h>

#include <WiFiManager.h>

int ledPin = BUILTIN_LED;

WiFiServer server(80);

void setup() {

OLED.begin();

OLED.clearDisplay();

//Add stuff into the 'display buffer'

OLED.setTextWrap(false);

OLED.setTextSize(1);

OLED.setTextColor(WHITE);

OLED.setCursor(0,0);

delay(10);

pinMode(ledPin, OUTPUT);

digitalWrite(ledPin, HIGH);

// Connect to WiFi network

OLED.println("wifiManager autoConnect...");

OLED.display(); //output 'display buffer' to screen

WiFiManager wifiManager;

wifiManager.autoConnect();

OLED.println("WiFi connected");

OLED.display(); //output 'display buffer' to screen

// Start the server

server.begin();

OLED.println("Server started");

// Print the IP address

OLED.print("http://");

OLED.print(WiFi.localIP());

OLED.println("/");

OLED.display(); //output 'display buffer' to screen

// OLED.startscrollleft(0x00, 0x0F); //make display scroll

if (!bmp.begin(0x76))

{

OLED.println("Could not find BMP180 or BMP085 sensor at 0x77");

OLED.display(); //output 'display buffer' to screen

while (1) {}

}

void OLED_show()

{

OLED.clearDisplay();

OLED.setCursor(0,0);

// Print the IP address

OLED.print("http://");

OLED.print(WiFi.localIP());

OLED.println("/");

OLED.setCursor(0,8);

OLED.print("Temp = ");

OLED.print(bmp.readTemperature());

OLED.println(" Celsius");

// set the cursor to column 0, line 1

// (note: line 1 is the second row, since counting begins with 0):

OLED.setCursor(0,16);

OLED.print("Pres = ");

OLED.print(bmp.readPressure());

OLED.println(" Pascal ");

// print the number of seconds since reset:

OLED.setCursor(0,24);

OLED.print(millis() / 1000);

OLED.display(); //output 'display buffer' to screen

}

void loop() {

delay(500);

// Check if a client has connected

WiFiClient client = server.available();

if (!client) {

OLED_show();

delay(1);

return;

}

// Wait until the client sends some data

OLED.println("new client");

// while(!client.available()){

// delay(1);

// }

// Read the first line of the request

String request = client.readStringUntil('\r');

OLED.println(request);

OLED.display(); //output 'display buffer' to screen

client.flush();

// Match the request

int value = LOW;

if (request.indexOf("/LED=ON") != -1) {

digitalWrite(ledPin, LOW);

value = HIGH;

}

if (request.indexOf("/LED=OFF") != -1){

digitalWrite(ledPin, HIGH);

value = LOW;

}

// Return the response

client.println("HTTP/1.1 200 OK");

client.println("Content-Type: text/html");

client.println(""); // do not forget this one

client.println("<!DOCTYPE HTML>");

client.println("<html>");

client.print("Temp = ");

client.print(bmp.readTemperature());

client.println(" Celsius ");

client.print("Pres = ");

client.print(bmp.readPressure());

client.println(" Pascal ");

client.print("Led pin is now: ");

if(value == HIGH) {

client.print("On");

} else {

client.print("Off");

}

client.println(" ");

client.println("Click <a href=\"/LED=ON\">here</a> turn the LED ON ");

client.println("Click <a href=\"/LED=OFF\">here</a> turn the LED OFF ");

client.println("</html>");

delay(1);

OLED.println("Client disconnected");

OLED.println("");

OLED.display(); //output 'display buffer' to screen

}

/* * */ #include <Wire.h> #include <Adafruit_BMP280.h> #include <Adafruit_GFX.h> #include <Adafruit_SSD1306.h> #define OLED_RESET 0 // GPIO0 Adafruit_SSD1306 OLED(OLED_RESET); #define BMP_SCK 13 #define BMP_MISO 12 #define BMP_MOSI 11 #define BMP_CS 10 Adafruit_BMP280 bmp; // I2C //Adafruit_BMP280 bmp(BMP_CS); // hardware SPI //Adafruit_BMP280 bmp(BMP_CS, BMP_MOSI, BMP_MISO, BMP_SCK); #include <ESP8266WiFi.h> #include <DNSServer.h> #include <ESP8266WebServer.h> #include <WiFiManager.h> int ledPin = BUILTIN_LED; WiFiServer server(80); void setup() { OLED.begin(); OLED.clearDisplay(); //Add stuff into the 'display buffer' OLED.setTextWrap(false); OLED.setTextSize(1); OLED.setTextColor(WHITE); OLED.setCursor(0,0); delay(10); pinMode(ledPin, OUTPUT); digitalWrite(ledPin, HIGH); // Connect to WiFi network OLED.println("wifiManager autoConnect..."); OLED.display(); //output 'display buffer' to screen WiFiManager wifiManager; wifiManager.autoConnect(); OLED.println("WiFi connected"); OLED.display(); //output 'display buffer' to screen // Start the server server.begin(); OLED.println("Server started"); // Print the IP address OLED.print("http://"); OLED.print(WiFi.localIP()); OLED.println("/"); OLED.display(); //output 'display buffer' to screen // OLED.startscrollleft(0x00, 0x0F); //make display scroll if (!bmp.begin(0x76)) { OLED.println("Could not find BMP180 or BMP085 sensor at 0x77"); OLED.display(); //output 'display buffer' to screen while (1) {} } } void OLED_show() { OLED.clearDisplay(); OLED.setCursor(0,0); // Print the IP address OLED.print("http://"); OLED.print(WiFi.localIP()); OLED.println("/"); OLED.setCursor(0,8); OLED.print("Temp = "); OLED.print(bmp.readTemperature()); OLED.println(" Celsius"); // set the cursor to column 0, line 1 // (note: line 1 is the second row, since counting begins with 0): OLED.setCursor(0,16); OLED.print("Pres = "); OLED.print(bmp.readPressure()); OLED.println(" Pascal "); // print the number of seconds since reset: OLED.setCursor(0,24); OLED.print(millis() / 1000); OLED.display(); //output 'display buffer' to screen } void loop() { delay(500); // Check if a client has connected WiFiClient client = server.available(); if (!client) { OLED_show(); delay(1); return; } // Wait until the client sends some data OLED.println("new client"); // while(!client.available()){ // delay(1); // } // Read the first line of the request String request = client.readStringUntil('\r'); OLED.println(request); OLED.display(); //output 'display buffer' to screen client.flush(); // Match the request int value = LOW; if (request.indexOf("/LED=ON") != -1) { digitalWrite(ledPin, LOW); value = HIGH; } if (request.indexOf("/LED=OFF") != -1){ digitalWrite(ledPin, HIGH); value = LOW; } // Return the response client.println("HTTP/1.1 200 OK"); client.println("Content-Type: text/html"); client.println(""); // do not forget this one client.println("<!DOCTYPE HTML>"); client.println("<html>"); client.print("Temp = "); client.print(bmp.readTemperature()); client.println(" Celsius "); client.print("Pres = "); client.print(bmp.readPressure()); client.println(" Pascal "); client.print("Led pin is now: "); if(value == HIGH) { client.print("On"); } else { client.print("Off"); } client.println(" "); client.println("Click <a href=\"/LED=ON\">here</a> turn the LED ON "); client.println("Click <a href=\"/LED=OFF\">here</a> turn the LED OFF "); client.println("</html>"); delay(1); OLED.println("Client disconnected"); OLED.println(""); OLED.display(); //output 'display buffer' to screen }

/*
 * 
 */
#include <Wire.h> 
#include <Adafruit_BMP280.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
 
#define OLED_RESET 0  // GPIO0
Adafruit_SSD1306 OLED(OLED_RESET);

#define BMP_SCK 13
#define BMP_MISO 12
#define BMP_MOSI 11 
#define BMP_CS 10

Adafruit_BMP280 bmp; // I2C
//Adafruit_BMP280 bmp(BMP_CS); // hardware SPI
//Adafruit_BMP280 bmp(BMP_CS, BMP_MOSI, BMP_MISO,  BMP_SCK);

#include <ESP8266WiFi.h>
#include <DNSServer.h>
#include <ESP8266WebServer.h>
#include <WiFiManager.h> 
 
int ledPin = BUILTIN_LED;
WiFiServer server(80);
 
void setup() {
  OLED.begin();
  OLED.clearDisplay();
 
  //Add stuff into the 'display buffer'
  OLED.setTextWrap(false);
  OLED.setTextSize(1);
  OLED.setTextColor(WHITE);
  OLED.setCursor(0,0);
  delay(10);
 
 
  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, HIGH);
 
  // Connect to WiFi network
  OLED.println("wifiManager autoConnect...");
  OLED.display(); //output 'display buffer' to screen  
 
  WiFiManager wifiManager;
  wifiManager.autoConnect();

  OLED.println("WiFi connected");
  OLED.display(); //output 'display buffer' to screen  
 
  // Start the server
  server.begin();
  OLED.println("Server started");
  
  // Print the IP address
  OLED.print("http://");
  OLED.print(WiFi.localIP());
  OLED.println("/");
 
  OLED.display(); //output 'display buffer' to screen  
  // OLED.startscrollleft(0x00, 0x0F); //make display scroll 

  if (!bmp.begin(0x76)) 
  {
    OLED.println("Could not find BMP180 or BMP085 sensor at 0x77");
    OLED.display(); //output 'display buffer' to screen  
    while (1) {}
  }
}

void OLED_show()
{

  OLED.clearDisplay();
  OLED.setCursor(0,0);
  // Print the IP address
  OLED.print("http://");
  OLED.print(WiFi.localIP());
  OLED.println("/");
  OLED.setCursor(0,8);
  OLED.print("Temp = ");
  OLED.print(bmp.readTemperature());
  OLED.println(" Celsius");
  // set the cursor to column 0, line 1
  // (note: line 1 is the second row, since counting begins with 0):
  OLED.setCursor(0,16);
  OLED.print("Pres = ");
  OLED.print(bmp.readPressure());
  OLED.println(" Pascal ");
  // print the number of seconds since reset:
  OLED.setCursor(0,24);
  OLED.print(millis() / 1000);

  OLED.display(); //output 'display buffer' to screen  
}

void loop() {
  delay(500);
  // Check if a client has connected
  WiFiClient client = server.available();
  if (!client) {
    OLED_show();
    delay(1);
    return;
  }
 
  // Wait until the client sends some data
  OLED.println("new client");
  // while(!client.available()){
  //   delay(1);
  // }
 
  // Read the first line of the request
  String request = client.readStringUntil('\r');
  OLED.println(request);
  OLED.display(); //output 'display buffer' to screen  
  client.flush();
 
  // Match the request
 
  int value = LOW;
  if (request.indexOf("/LED=ON") != -1) {
    digitalWrite(ledPin, LOW);
    value = HIGH;
  } 
  if (request.indexOf("/LED=OFF") != -1){
    digitalWrite(ledPin, HIGH);
    value = LOW;
  }
 
 
 
  // Return the response
  client.println("HTTP/1.1 200 OK");
  client.println("Content-Type: text/html");
  client.println(""); //  do not forget this one
  client.println("<!DOCTYPE HTML>");
  client.println("<html>");
 
  client.print("Temp = ");
  client.print(bmp.readTemperature());
  client.println(" Celsius <br>");
  client.print("Pres = ");
  client.print(bmp.readPressure());
  client.println(" Pascal <br>");

  client.print("Led pin is now: ");
 
  if(value == HIGH) {
    client.print("On");  
  } else {
    client.print("Off");
  }
  client.println("<br><br>");
  client.println("Click <a href=\"/LED=ON\">here</a> turn the LED ON<br>");
  client.println("Click <a href=\"/LED=OFF\">here</a> turn the LED OFF<br>");
  client.println("</html>");
 
  delay(1);
  OLED.println("Client disconnected");
  OLED.println("");
  OLED.display(); //output 'display buffer' to screen  
 
}

実験方法：

プログラム検証
WeMosにプログラムアップロード
WeMosのWiFiManeger で接続、AP設定
WeMosのOLEDでIP確認
自動的にhttpサーバを立ち上げ、ブラウザーから接続を待機
接続するとBMP280センサー情報を返送する。

Filed under: IoT Study Kit,WeMos D1 Mini (c) web - @ 8:29 PM

Tags: featured

Arduino (ESP8266)

Create IoT with ESP8266 Develop Board

Top Posts & Pages

Categories

Meta

WeMos (c3) Home IoT Server

Related

Top Posts & Pages

Categories

Meta

共有:

Related